Method of Processing Fields of Images and Related Device for Data Lines Similarity Detection

Abstract

A method for processing image fields is provided. The method includes determining similarities of first data lines of a first plurality of couples of fields among a plurality of fields by detecting similarities of pixels of the first data lines of the first plurality of couples of fields, and generating television image signals relative to the first data lines of a plurality of couples of adjacent fields among the plurality of fields by utilizing the first data lines of the plurality of couples of adjacent fields according to a predetermined rule when a first predetermined pattern is detected from said similarities of said first data lines of the first plurality of couples of fields.

1 . A method of generating a television image signal according to data lines similarity comprising: 
 determining similarities of first data lines of a first plurality of couples of fields among a plurality of fields by detecting similarities of pixels of the first data lines of the first plurality of couples of fields; and    generating data of the television image signal by utilizing the first data lines of the plurality of couples of adjacent fields according to a predetermined rule when a first predetermined pattern is detected from said similarities of said first data lines of the first plurality of couples of fields;    wherein the data of the television signal is relative to the first data lines of a plurality of couples of adjacent fields among the plurality of fields.    
     
     
         2 . The method of  claim 1 , wherein in the step of detecting similarities, each couple of fields among the plurality of couples of fields comprises two odd fields or two even fields, and in the step of generating the television image signal, each plurality couple of adjacent fields comprises an odd field and an even field.  
     
     
         3 . The method of  claim 2 , wherein in the step of generating the television image signal, the first predetermined pattern indicates that, among a plurality of couples of adjacent fields, in every five successive fields, a first data line of the first field is similar to a first data line of the third field, and the predetermined rule then utilizes the first data lines of a first couple of adjacent fields among the plurality of successive fields to generate two data lines of a frame corresponding to the first couple of adjacent fields in the television image signal, utilizes the first data lines of a second couple of adjacent fields among the plurality of successive fields to generate two data lines of a frame corresponding to the second couple of adjacent fields in the television image signal, and utilizes the first data lines of a fourth couple of adjacent fields among the plurality of successive fields to generate two data lines of a frame corresponding to the fourth couple of adjacent fields in the television image signal.  
     
     
         4 . The method of  claim 1 , wherein in the detecting step, each couple of fields among the plurality of couples of fields comprises one odd field and an adjacent even field; and in the step of generating the television image signal, each couple of adjacent fields among the plurality of adjacent fields comprises an odd field and an even field.  
     
     
         5 . The method of  claim 4 , wherein in the step of generating the television image signal, the first predetermined pattern indicates that among the plurality of successive fields, in every five successive fields, a first data line of the first field is similar to two corresponding data lines of the second field, and a first data line of the fourth field is similar to two corresponding data lines of the fifth field; and the predetermined rule then utilizes first data lines of the first couple of adjacent fields among the plurality of successive fields to generate two data lines of a frame corresponding to the first couple of adjacent fields in the television image signal, utilizes first data lines of the second couple of adjacent fields among the plurality of successive fields to generate two data lines of a frame corresponding to the second couple of adjacent fields in the television image signal, and utilizes first data lines of the fourth couple of adjacent fields among the plurality of successive fields to generate two data lines of a frame corresponding to the fourth couple of adjacent fields in the television image signal.  
     
     
         6 . The method of  claim 1 , wherein the detecting step compares gray level variation between a target pixel of a first data line of a target field and corresponding pixels of corresponding data lines of a corresponding field in order to determine a similarity of the said target pixel of the first data line of the said target field; in which the target pixel and the corresponding pixels are located on a same horizontal coordinate.  
     
     
         7 . The method of  claim 6  determining the said target pixel of the first data line of the said target field is similar to the corresponding pixels of the said corresponding field when the gray level variation between the target pixel of the first data line of the target field and the corresponding pixels of the corresponding data lines of the corresponding field is less than a first predetermined value.  
     
     
         8 . The method of  claim 7  wherein the detecting step further comprises: 
 in the first data line of the target field, accumulating the amount of pixels of which the gray level variation from the corresponding pixels of the corresponding field is less than a predetermined value; and    determining the similarity of the first data line of the target field according to the amount of pixels of which the gray level variation is less than the predetermined value.    
     
     
         9 . The method of  claim 8  determining the first data line of the target field is similar to the first data line of the corresponding field when the amount of pixels of the first data line of the target field that is similar to the corresponding pixels of corresponding data lines of the corresponding field is more than a second predetermined value.  
     
     
         10 . The method of  claim 6  determining the target pixel is similar to the corresponding pixels of the two corresponding data lines of the corresponding field when the gray level variation between the target pixel of the first data line of the target field and a corresponding pixel of a first corresponding data line of the corresponding field is less than a first predetermined value, and the gray level variation between the target pixel of the first data line of the target field and a corresponding pixel of a second corresponding data line of the corresponding field is less than a second predetermined value.  
     
     
         11 . The method of  claim 10  wherein the detecting step further comprises: 
 in the first data line of the target field, accumulating the amount of pixels which is similar to the corresponding pixels of the two corresponding data lines of the corresponding field in order to get a statistic; and    determining the similarity of the first data line of the target field according to the statistic.    
     
     
         12 . The method of  claim 11  determining the first data line of the target field is similar to the two corresponding data lines of the corresponding field when the statistic is greater than a third predetermined value.  
     
     
         13 . The method of  claim 1  further comprising: 
 generating data relative to the first data lines of the plurality of fields in the television image signal according to the first data lines of the plurality of fields when the similarities of the said first data lines do not conform to the first predetermined pattern.    
     
     
         14 . The method of  claim 13  directly utilizing the target field to generate two adjacent data lines of a frame corresponding to the target field in the television image signal when the similarities of the first data lines do not conform to the first predetermined pattern.  
     
     
         15 . The method of  claim 1  wherein the plurality of fields is originated from an interlaced scanning television image signal formed from movie image data.  
     
     
         16 . The method of  claim 1  further comprising: 
 detecting similarities of a second plurality of fields;    wherein the step of detecting similarities of pixels of the first data lines of the first plurality of couples of fields is performed when the similarities of the second plurality of fields conform to a second predetermined pattern.    
     
     
         17 . The method of  claim 16  wherein the second predetermined pattern indicates that among the second plurality of fields, a first field of every five successive fields is similar to a third field of the five successive fields.  
     
     
         18 . The method of  claim 16  wherein the second predetermined pattern indicates that among the second plurality of fields, in every five successive fields, a first field is similar to a second field, a second field is similar to a third field, and a fourth field is similar to a fifth field.  
     
     
         19 . The method of  claim 1  further comprising: 
 accumulating the amount of pairs of data lines that are similar to each other in a couple of fields among the first plurality of couples of fields.    
     
     
         20 . The method of  claim 1  wherein the television image signal is a progressive scan television image signal.  
     
     
         21 . A display controller capable of detecting data line similarity comprising: 
 a buffer for temporarily storing a plurality of data lines of a target field;    a data line similarity detector, coupled to the buffer, for detecting a similarity of each data line of the target field;    a data line state recorder for recording the similarity of each data line of the target field;    a de-interlacer coupled to the buffer; and    a scaler coupled to the de-interlacer;    wherein the de-interlacer selectively de-interlaces the target field according to the content stored in the data line state recorder in order to generate a de-interlaced output, and the scaler generates a scaling output according to the de-interlaced output.    
     
     
         22 . The display controller of  claim 21 , wherein the data line state recorder is 525*5 bits.  
     
     
         23 . The display controller of  claim 21 , wherein the data line state recorder is 625*5 bits.  
     
     
         24 . The display controller of  claim 21  further comprising a field state flag for storing a field state of the target field.  
     
     
         25 . The display controller of  claim 24 , wherein the field state flag comprises a running text flag, a still text flag, and an image bad editing flag for respectively representing a state of a running text, a state of a still text, and a state of an image bad editing.  
     
     
         26 . A method for generating a scaling output according to similarities of data lines, the method comprising: 
 analyzing and recording similarities of a plurality of data lines of a target field;    selectively de-interlacing the target field according to the similarities of the plurality of data lines in order to generate a de-interlaced output; and    scaling the de-interlaced output to generate the scaling output.    
     
     
         27 . The method of  claim 26 , wherein the selectively de-interlacing step deinterlaces a main area of the target field with reference to an adjacent field, successive to the target field according to the similarities of the data lines.  
     
     
         28 . The method of  claim 27 , wherein the selectively de-interlacing step performs the interpolation with reference to the target field in reponse to the similarities of the data lines.  
     
     
         29 . The method of  claim 26 , wherein the similarities of a plurality of the data lines of the target field are determined by comparing each data line of the target field with each corresponding data line of a successive field.  
     
     
         30 . The method of  claim 29 , wherein the target field and the successive field are respectively an add field and an even field, which are successive to each other in time domain.  
     
     
         31 . The method of  claim 29 , wherein the target field and the successive field are two fields, which have one field between them.  
     
     
         32 . The method of  claim 31 , wherein the target field and the successive field are two odd fields or two even fields.