Digital video signal recording/reproducing method and apparatus

Abstract

An object of the present invention is to provide a digital signal recording method and a digital signal recording apparatus, capable of readily producing a signal used to reproduce in a trick play mode from a digital compression video signal. The above-described object of the present invention may be achieved by such a digital video signal recording method for recording a first compression frame signal compressed without using a correlation between frames, and a digital compression video signal having preselected bytes of a packet format constituted by a second compression frame signal compressed with using the correlation between the frames, in which a third signal made of a packet containing the first compression frame signal is produced, and then is recorded in combination with the packet of the digital compression signal.

What is claimed is:  
     
         1 . A digital video signal recording method for recording a first compression frame signal compressed without using a correlation between frames, and a digital compression video signal having preselected bytes of a packet format constituted by a second compression frame signal compressed with using the correlation between the frames, wherein: 
 a third signal made of a packet containing the first compression frame signal is produced, and then is recorded in combination with the packet of the digital compression signal.    
     
     
         2 . A digital video signal recording method as claimed in  claim 1  wherein: 
 header information indicative of a head of said first compression frame signal and/or said second compression frame signal is added to said digital compression video signal; and  
 said third signal is extracted in unit of a packet from the packet of said digital compression video signal by using said header information as a reference to thereby be generated.  
 
     
     
         3 . A digital video signal recording method as claimed in  claim 1  wherein: 
 said digital compression video signal forms a single sequence by said first compression frame signal and said second compression frame signal having a predetermined number of frames, and header information indicative of a head of said sequence is added to said digital compression video signal; and  
 said third signal is extracted in unit of a packet from the packet of said digital compression video signal by using said header information as a reference to thereby be generated.  
 
     
     
         4 . A digital video signal recording method as claimed in  claim 3  wherein: 
 said third signal is arranged by a series of packets defined from a packet containing said header information up to a packet containing a head of said second compression frame signal.  
 
     
     
         5 . A digital video signal recording method as claimed in  claim 4  wherein: 
 at least the header information indicative of the head of said second compression frame signal is replaced by other different information within the packet containing the header information indicative of the head of said second compression frame signal.  
 
     
     
         6 . A digital video signal recording method as claimed in  claim 3  wherein: 
 said third signal is arranged by a series of packets defined from a packet containing said header information up to a packet containing the head of said second compression frame signal.  
 
     
     
         7 . A digital video signal recording method as claimed in  claim 1  wherein: 
 said third signal is produced by deleting a portion of the packets from a series of packets for constituting said first compression frame signal.  
 
     
     
         8 . A digital video signal recording apparatus for recording on a recording medium, a first compression frame signal compressed without using a correlation between frames, and a digital compression video signal having preselected bytes of a packet format constituted by a second compression frame signal compressed with using the correlation between the frames, comprising: 
 a signal producing unit for producing a third signal made of a packet containing the first compression frame signal;    a recording circuit for recording both a packet of said digital compression video signal and a packet of said third signal as a recording signal having a predetermined format on said recording medium.    
     
     
         9 . A digital video signal recording apparatus as claimed in  claim 8  wherein: 
 said signal producing circuit extracts the packet of said digital compression video signal based upon information about the packet of said digital compression video signal in unit of the packet to thereby produce said third signal.  
 
     
     
         10 . A digital video signal recording apparatus as claimed in  claim 9  wherein: 
 said signal producing circuit includes a demultiplex circuit for discriminating the packet of said digital compression video signal based upon header information of the packet of said digital compression video signal to thereby demultiplex a packet used to produce said third signal.  
 
     
     
         11 . A digital video signal recording apparatus as claimed in  claim 9  wherein: 
 said signal producing circuit includes a detecting circuit for discriminating said digital compression video signal based upon header information of said digital compression video signal to thereby extract a packet used to produce said third signal.  
 
     
     
         12 . A digital video signal recording apparatus as claimed in  claim 11  wherein: 
 header information indicative of a head of said first compression frame signal and/or said second compression frame signal is added to said digital compression video signal; and  
 said detecting circuit extracts the packet of said digital compression video signal in unit of the packet on the basis of the header information indicative of the head of said frame signal to thereby produce said third signal.  
 
     
     
         13 . A digital video signal recording apparatus as claimed in  claim 11  wherein: 
 said digital compression video signal forms a single sequence by said first compression frame signal and said second compression frame signal having a predetermined number of frames, and second header information indicative of a head of said sequence; and  
 said detecting circuit extracts the packet of said digital compression video signal in unit of the packet on the basis of the header information indicative of the head of said frame signal to thereby produce said third signal.  
 
     
     
         14 . A digital video signal recording apparatus as claimed in  claim 8  wherein: 
 said signal producing circuit deletes a portion of packets from a series of packets for constituting said first compression frame signal to thereby produce said third signal.  
 
     
     
         15 . A digital video signal recording method for recording on a magnetic recording medium by using a rotary head, a first compression frame signal constructed of a picture compressed without using a correlation between frames; a digital compression video signal having a preselected bytes of a packet format constituted by a second compression frame signal made of a picture compressed with using the correlation between the frames; and a third signal made of a packet containing said first compression frame signal; wherein: 
 information indicative of an arrangement condition of signals is added to the third signal, and the resultant third signal is recorded on a predetermined region of a track on the recording medium.    
     
     
         16 . A digital video signal recording method as claimed in  claim 15  wherein: 
 information indicative of a signal arrangement condition of said arrangement condition of said third signal contains at least information representative of a sequence of said tracks within said predetermined region.  
 
     
     
         17 . A digital video signal recording method as claimed in  claim 16  wherein: 
 said track is constituted by blocks having a preselected number of bytes; and said sequence of the tracks within said predetermined region is such information indicative of a sequence of the blocks within said predetermine region of said track.  
 
     
     
         18 . A digital video signal recording method as claimed in  claim 15  wherein: 
 information indicative of a signal arrangement condition of said third signal contains at least information representative of a sequence of said tracks.  
 
     
     
         19 . A digital video signal recording method as claimed in  claim 18  wherein: 
 said third signal is formed in such a manner that the same signals are multiplexed to be arranged on n tracks; and  
 the information indicative of the order of said tracks is such information representative of a track order in unit of said n tracks.  
 
     
     
         20 . A digital video signal recording method as claimed in  claim 15  wherein: 
 information indicative of a signal arrangement condition of said third signal contains at least information representative of a sequence in unit of said picture.  
 
     
     
         21 . A digital video signal recording method as claimed in  claim 20  wherein: 
 said picture is constituted by said third signals of different numbers of said tracks; and  
 said information indicative of the sequence in unit of said pictures is such information representative of a sequence every plural tracks for constituting said pictures.  
 
     
     
         22 . A digital video signal recording apparatus for recording on a magnetic recording medium by using a rotary head, a first compression frame signal constructed of a picture compressed without using a correlation between frames; a digital compression video signal having a preselected bytes of a packet format constituted by a second compression frame signal made of a picture compressed with using the correlation between the frames; and a third signal made of a packet containing said first compression frame signal; wherein: 
 said digital video signal recording apparatus is comprised of:    signal producing means for producing said third signal; and    information adding means for adding information indicative of a signal arrangement condition to said third signal.    
     
     
         23 . A digital video signal recording apparatus as claimed in  claim 22  wherein: 
 said information adding means produces information indicative of at least a sequence of said tracks within a predetermined region and adds said information to said third signal.  
 
     
     
         24 . A digital video signal recording apparatus as claimed in  claim 22  wherein: 
 said information adding means produces information indicative of at least a sequence of said tracks and adds said information to said third signal.  
 
     
     
         25 . A digital video signal recording apparatus as claimed in  claim 22  wherein: 
 said information adding means produces information indicative of at least a sequence in unit of said pictures and adds said information to said third signal.  
 
     
     
         26 . A digital video signal recording method for recording on a recording medium, a first compression frame signal compressed without using a correlation between frames; a digital compression video signal having a preselected bytes of a packet format constituted by a second compression frame signal compressed with using the correlation between the frames; and a third signal made of a packet containing said first compression frame signal; wherein: 
 1 frame of said first compression frame signal is constituted by m packets; and    in the case that a region for recording thereon said third signal on said recording medium is equal to n packets per 1 track, while said first compression frame signal constituted by said m packets is used as said third signal, a 1 frame signal is arranged in a region for recording thereon said third signal of k tracks being equal to k≧m/n and then is recorded on said recording medium.    
     
     
         27 . A digital video signal recording method as claimed in  claim 26  wherein: 
 said first compression frame signal constituted by said m packets is arranged as said third signal in a region for recording thereon said third signal of the k tracks being equal to m/n+1≧k >m/n, and then is recorded on said recording medium.  
 
     
     
         28 . A digital video signal recording method as claimed in  claim 27  wherein: 
 in the case of k>m/n, said third signal is not arranged in a final block (k×n−m) of the region for recording said third signal of a k-th track.  
 
     
     
         29 . A digital video signal recording method as claimed in  claim 26  wherein: 
 packet numbers “m” of 1 frame of said first compression frame signal are different from each other every frame.  
 
     
     
         30 . A digital video signal recording method as claimed in  claim 26  wherein: 
 in the case that the packet numbers “m” of 1 frame of said first compression frame signal are larger than a preselected number (k′×n), only (k′×n) packets among the packets of 1 frame of said first compression frame signal are arranged as the third signal in a region for recording thereon said third signal of k′ tracks, and then are recorded in said recording medium.  
 
     
     
         31 . A digital video signal recording method as claimed in  claim 1  wherein: 
 information indicative of a head of said first compression frame signal or said second compression frame signal is added to said digital compression video signal; and  
 said third signal is extracted in unit of a packet from the packet of said digital compression video signal by using said information indicative of said head as a reference to thereby be generated.  
 
     
     
         32 . A digital video signal recording method as claimed in  claim 31  wherein: 
 said digital compression video signal forms a single sequence by said first compression frame signal and said second compression frame signal having a predetermined number of frames, and second information indicative of a head of said sequence is added to said digital compression video signal; and  
 said third signal is extracted in unit of a packet from the packet of said digital compression video signal by using said second information as a reference to thereby be generated.  
 
     
     
         33 . A digital video signal recording method as claimed in  claim 32  wherein: 
 said third signal is arranged by a series of packets defined from a packet containing said second information up to a packet prior to such a packet containing header information for indicating a head of said second compression frame signal.  
 
     
     
         34 . A digital video signal recording method as claimed in  claim 26  wherein: 
 said third signal is recorded in such a manner that the same signals are arranged in a region for recording thereon the third signals of i tracks.  
 
     
     
         35 . A digital video signal recording method as claimed in  claim 34  wherein: 
 said third signal is recorded in such a manner that the same signals are arranged in a region for recording thereon the third signals of continued “i” tracks, and a signal of 1 frame is arranged in a region for recording thereon said third signals of (k×i) tracks.  
 
     
     
         36 . A digital video signal recording method as claimed in  claim 26  wherein: 
 said third signal is arranged by a compression frame signal selected from a series of said first compression frame signal.  
 
     
     
         37 . A digital video signal recording method as claimed in  claim 36  wherein: 
 in the case that an a-th frame of said first compression frame signal is arranged as said third signal in j (j≧k) tracks to be recorded thereon, an a′-th frame of said first compression signal is selected as a third signal subsequent to said third signal, said a′-th frame being present after a time period used to record substantially j tracks from the a-th frame.  
 
     
     
         38 . A digital video signal recording apparatus for recording on a recording medium, a first compression frame signal compressed without using a correlation between frames, and a digital compression video signal having preselected bytes of a packet format constituted by a second compression frame signal compressed with using the correlation between the frames, wherein: 
 1 frame of said first compression frame signal is constituted by m packets;    said digital video signal recording apparatus is comprised of: a signal producing circuit, in the case that a region for recording thereon said third signal on said recording medium is equal to n packets per 1 track, for producing said first compression frame signal constituted by said m packets as said third signal, and for arranging in a region for recording thereon said third signal of k tracks being equal to k≧m/n; and    a recording circuit for recording a packet of said digital compression video signal and a packet of said third signal as a recording signal having a predetermined format on said recording medium.    
     
     
         39 . A digital video signal recording apparatus as claimed in  claim 38  wherein: 
 information indicative of a head of said first compression frame signal, or said second compression frame signal is added to said digital compression video signal; and  
 said signal producing circuit includes a detecting means for detecting the information indicative of said head.  
 
     
     
         40 . A digital video signal recording apparatus as claimed in  claim 39  wherein: 
 said digital compression video signal forms a single sequence by said first compression frame signal and said second compression frame signal having a predetermined number of frames, and second information indicative of a head of said sequence is added to said digital compression video signal; and  
 said signal producing circuit includes a detecting means for detecting said second information.  
 
     
     
         41 . A digital video signal recording apparatus for recording on a recording medium, an inputted digital compression video signal having predetermined bytes of a packet format; plural sorts of packets made of information related to said digital compression video signal; and a second signal produced from said digital compression video signal; wherein: 
 said digital video signal recording apparatus is comprised of: 
 filtering means for filtering a specific packet from said digital compression video signal based upon discrimination information used to discriminate the sort of said inputted packet; and  
 signal producing means for producing said second signal based on the filtered packet by said filtering circuit.  
   
     
     
         42 . A digital video signal outputting apparatus comprising; 
 output means for outputting a digital compression video signal having predetermined bytes of a packet format, plural sorts of packets made of information related to said digital compression video signal, and packet discrimination information used to discriminate information used to discriminate a sort of said packet.    
     
     
         43 . A digital video signal outputting apparatus as claimed in  claim 42  wherein: 
 said output means outputs packet discrimination information used to discriminate a packet of said digital compression video signal.  
 
     
     
         44 . A digital video signal reproducing method for reproducing a first digital video signal constituted by a picture signal which has been recorded on a recording medium and compressed without using a correlation between frames and by another picture signal compressed by using the correlation between the frames; and a second signal produced from a picture signal compressed without using the correlation between the frames contained in the first digital video signal, wherein: 
 the digital video signal reproducing method contains a first mode for reproducing the first digital video signal and a second mode for reproducing the second signal; in the first mode, the reproduced first digital video signal is outputted at the same timing during the recording operation; and in the second mode, the reproduced second signal is outputted at predetermined timing different from that of the recording operation.    
     
     
         45 . A digital video signal reproducing method as claimed in  claim 44  wherein: 
 said first mode is such a mode that said recording medium is traveled at a speed equal to the speed of the recording operation; and  
 said second mode is such a mode that said recording medium is traveled at a speed different from the speed of the recording operation.  
 
     
     
         46 . A digital video signal reproducing method as claimed in  claim 44  wherein: 
 in said first mode, said first reproduced digital video signal is outputted at the same timing as in the recording operation based on a time stamp used in the recording operation and added to said first digital video signal.  
 
     
     
         47 . A digital video signal reproducing method as claimed in  claim 44  wherein: 
 in said second mode, said second reproduced signal is outputted in unit of the picture.  
 
     
     
         48 . A digital video signal reproducing method as claimed in  claim 47  wherein: 
 in said second mode, said second reproduced signal is outputted in unit of the picture at a time instant when data of 1 picture is reproduced.  
 
     
     
         49 . A digital video signal reproducing method as claimed in  claim 47  wherein: 
 in said second mode in which said recording medium is traveled along a direction reversed to the direction during the recording operation, said second signals reproduced according to the reverse order with respect to that of the recording operation are rearranged in unit of the picture along the same order as in the recording operation, and then the rearranged second signals are outputted.  
 
     
     
         50 . A digital video signal reproducing apparatus for reproducing a first digital video signal constituted by a picture signal which has been recorded on a recording medium and compressed without using a correlation between frames and by another picture signal compressed by using the correlation between the frames; and a second signal produced from a picture signal compressed without using the correlation between the frames contained in the first digital video signal, wherein: 
 the digital video signal reproducing apparatus is comprised of: reproducing means containing a first mode for reproducing the first digital video signal and a second mode for reproducing the second signal; and output means for, in the first mode, outputting the reproduced first digital video signal at the same timing during the recording operation; and in the second mode, outputting the reproduced second signal at predetermined timing different from that of the recording operation.    
     
     
         51 . A digital video signal reproducing apparatus as claimed in  claim 50  wherein: 
 said first mode is such a mode that said recording medium is traveled at a speed equal to the speed of the recording operation; and  
 said second mode is such a mode that said recording medium is traveled at a speed different from the speed of the recording operation.  
 
     
     
         52 . A digital video signal reproducing apparatus as claimed in  claim 50  wherein: 
 in said first mode, said output means outputs said first reproduced digital video signal at the same timing as in the recording operation based on a time stamp used in the recording operation and added to said first digital video signal.  
 
     
     
         53 . A digital video signal reproducing apparatus as claimed in  claim 50  wherein: 
 in said second mode, said output means outputs said second reproduced signal in unit of the picture.  
 
     
     
         54 . A digital video signal reproducing apparatus as claimed in  claim 53  wherein: 
 in said second mode, said output means outputs said second reproduced signal in unit of the picture at a time instant when data of 1 picture is reproduced.  
 
     
     
         55 . A digital video signal reproducing apparatus as claimed in  claim 53  wherein: 
 in said second mode in which said recording medium is traveled along a direction reversed to the direction during the recording operation, said second signals reproduced according to the reverse order with respect to that of the recording operation are rearranged in unit of the picture along the same order as in the recording operation, and then the rearranged second signals are outputted.  
 
     
     
         56 . A digital video signal reproducing method for reproducing a first digital video signal constituted by a picture signal which has been recorded on a recording medium and compressed without using a correlation between frames and by another picture signal compressed by using the correlation between the frames; and a second signal produced from a picture signal compressed without using the correlation between the frames contained in the first digital video signal, in which; 
 the digital video signal reproducing method contains a reproduction mode for reproducing at least the second signal at a speed different from a speed during a recording operation while traveling said recording medium; and    after the signal reproducing operation in said reproduction mode is accomplished, said recording medium is returned by a constant amount along a direction opposite to the reproduction direction.    
     
     
         57 . A digital video signal reproducing method as claimed in  claim 56  wherein: 
 immediately after the signal reproducing operation in the reproduction mode is ended, said recording medium is returned by a constant amount along the direction opposite to said reproduction direction.  
 
     
     
         58 . A digital video signal reproducing method as claimed in  claim 56  wherein: 
 an amount of returning said recording medium in a first reproduction mode in which said recording medium is traveled along a direction coincident with the travel direction during the recording operation is made different from an amount of returning said recording medium in a second reproduction mode in which said recording medium is traveled along a direction opposite to the travel direction during the recording operation.  
 
     
     
         59 . A digital video signal reproducing method as claimed in  claim 56  wherein: 
 said recording medium is returned after the signal reproducing operation in said reproduction mode is ended by such an amount corresponding to a distance defined from a position of said recording medium at a time instant when the signal reproducing operation is ended in said reproduction mode, up to another position of said recording medium where a picture of said first digital video signal is being recorded, said picture corresponding to such a picture under reproduction when the signal reproducing operation is said reproduction mode is ended.  
 
     
     
         60 . A digital video signal reproducing apparatus for reproducing a first digital video signal constituted by a picture signal which has been recorded on a recording medium and compressed without using a correlation between frames and by another picture signal compressed by using the correlation between the frames; and a second signal produced from a picture signal compressed without using the correlation between the frames contained in the first digital video signal, wherein: 
 the digital video signal reproducing apparatus contains a reproduction mode in which at least said second signal is reproduced by traveling said recording medium at a speed different from a travel speed during a recording operation; and    control means for returning said recording medium by a constant amount along a direction opposite to a reproducing direction after the signal reproducing operation in the reproduction mode is ended.    
     
     
         61 . A digital video signal reproducing apparatus as claimed in  claim 60  wherein: 
 immediately after the signal reproducing operation in the reproduction mode is ended, said control means returns said recording medium by a constant amount along the direction opposite to said reproduction direction.  
 
     
     
         62 . A digital video signal reproducing apparatus as claimed in  claim 60  wherein: 
 an amount of returning said recording medium in a first reproduction mode in which said recording medium is traveled along a direction coincident with the travel direction during the recording operation is made different from an amount of returning said recording medium in a second reproduction mode in which said recording medium is traveled along a direction opposite to the travel direction during the recording operation by said control means.  
 
     
     
         63 . A digital video signal reproducing apparatus as claimed in  claim 60  wherein: 
 said control mens returns said recording medium after the signal reproducing operation in said reproduction mode is ended by such an amount corresponding to a distance defined from a position of said recording medium at a time instant when the signal reproducing operation is ended in said reproduction mode, up to another position of said recording medium where a picture of said first digital video signal is being recorded, said picture corresponding to such a picture under reproduction when the signal reproducing operation is said reproduction mode is ended.  
 
     
     
         64 . A digital video signal decoding apparatus for decoding an inputted/compressed digital video signal, comprising: 
 selecting means containing a first mode in which said digital video signal and a compressed digital audio signal inputted together with said digital video signal are selected, and also a second mode in which only said digital video signal is selected; and    decoding means for decoding both said digital video signal and said digital audio signal selected in said first mode, and also for decoding said digital video signal selected in said second mode.    
     
     
         65 . A digital video signal decoding apparatus as claimed in  claim 64  wherein: 
 in said second mode, said selecting means recognizes all of entered signals as said digital video signal, and then outputs all of said recognized signals to said decoding means.  
 
     
     
         66 . A digital video signal decoding apparatus as claimed in  claim 64 , further comprising; 
 clock generating means for generating a reference clock in synchronism with said digital video signal based upon a time stamp contained in the inputted signal to output said reference clock to said decoding means in said first mode; and for outputting a preselected reference clock not synchronized with said digital video signal to said decoding means in said second mode.