Recording and reproducing apparatus

Abstract

In a recording and reproducing apparatus having an image sensor which had photoelectric conversion elements arranged in a two-dimensional offset manner and a signal processing part which is arranged to include a two-dimensional filter and a frame memory, a circuit is arranged to enable the two-dimensional filter which forms a luminance signal in recording to be used also for reproduction; and a sampling action for a reproducing operation is arranged t be performed in the form of sub-sampling for every field.

What is claimed is:  
     
         1 . A recording and reproducing apparatus having an image sensor which has photoelectric conversion elements arranged in a two-dimensionally offset manner and a signal processing part which is arranged to include a two-dimensional filter and a frame memory, comprising: 
 a) a circuit arranged to enable said two-dimensional filter which is arranged to form a luminance signal in recording to be used also for reproduction; and    b) sampling means arranged to perform sub-sampling for every field during a reproducing operation.    
     
     
         2 . An apparatus according to    claim 1   , wherein said two-dimensional filter includes a vertical low-pass filter and a horizontal low-pass filter.  
     
     
         3 . A recording and reproducing apparatus comprising: 
 a) image sensing means having a plurality of photoelectric conversion elements which are in a two-dimensionally offset structural arrangement;    b) recording and reproducing means for recording and reproducing an electrical video signal on and from a recording medium;    c) sampling means for sampling a reproduced output of said recording and reproducing means;    d) memory means for selectively storing a video signal output from said image sensing means or a video signal output from said sampling means; and    e) a two-dimensional filter arranged to form at least a luminance signal from an output of said memory means.    
     
     
         4 . An apparatus according to    claim 3   , wherein said image sensing means has light receiving elements which are in a hexagonal or rhombic shape, the centroid of each of said light receiving elements being arranged to be offset from that of another between lines.  
     
     
         5 . An apparatus according to    claim 3   , wherein said two-dimensional filter includes a vertical low-pass filter and a horizontal low-pass filter.  
     
     
         6 . An apparatus according to    claim 3   , wherein said memory means includes a frame memory which has a storage capacity for at least one frame amount of sampled signals.  
     
     
         7 . An apparatus according to    claim 3   , wherein said video signal to be recorded or reproduced by said recording and reproducing means includes a luminance signal and color-difference signals.  
     
     
         8 . A recording and reproducing apparatus comprising: 
 a) image sensing means having a plurality of photoelectric conversion elements which are in a two-dimensionally offset structural arrangement;    b) recording and reproducing means for recording and reproducing a sampled video signal on and from a recording medium;    c) memory means for selectively storing a video signal output from said image sensing means, a video signal output from said recording and reproducing means or a video signal output from a two-dimensional filter;    d) said two-dimensional filter arranged to perform a filtering process at least on an output of said memory means; and    e) sampling means arranged to sample an output of said two-dimensional filter and to supply the sampled output to said recording and reproducing means or to said memory means.    
     
     
         9 . An apparatus according to    claim 8   , wherein said image sensing means has light receiving elements which are in a hexagonal or rhombic shape, the centroid of each of said light receiving elements being arranged to be offset from that of another between lines.  
     
     
         10 . An apparatus according to    claim 8   , wherein said two-dimensional filter includes a vertical low-pass filter and a horizontal low-pass filter.  
     
     
         11 . An apparatus according to    claim 8   , wherein said memory means includes a frame memory which has a storage capacity for at least one frame amount of sampled signals.  
     
     
         12 . An apparatus according to    claim 3    or    8   , wherein said sampling means includes a switch circuit.  
     
     
         13 . An apparatus according to    claim 3    or    8   , wherein said recording and reproducing means is arranged to record and reproduce analog signals.  
     
     
         14 . An apparatus according to    claim 3    or    8   , wherein said recording and reproducing means is arranged to record a sampled digital signal.  
     
     
         15 . A reproducing apparatus comprising: 
 a) reproducing means for reproducing a recorded video signal;    b) means for sub-sampling the video signal reproduced by said reproducing means; and    c) signal processing means for processing the reproduced video signal sub-sampled by said sub-sampling means.    
     
     
         16 . An apparatus according to    claim 15   , wherein said signal processing means includes memory means.  
     
     
         17 . An apparatus according to    claim 15   , wherein said signal processing means includes memory means and a two-dimensional filter.  
     
     
         18 . An apparatus according to    claim 15   , wherein said sub-sampling means includes a switch circuit.  
     
     
         19 . An apparatus according to    claim 16    or    17   , wherein said memory means is arranged to have a storage capacity for one field amount or one frame amount of signals.  
     
     
         20 . An apparatus according to    claim 15   , wherein said reproducing means includes recording means for recording a video signal on a magnetic recording medium.