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1.发明专利
公开(公告)号：JP2000165884A
公开(公告)日：2000-06-16
申请号：JP31914499
申请日：1999-11-10
Applicant: ST MICROELECTRONICS SRL
Inventor： PICCINELLI EMILIANO , PEZZONI LUCA , PAU DANILO
Abstract: PROBLEM TO BE SOLVED: To code video data with a more simplified hardware by calculating the complexity index of a single block at present and adding the maximum absolute difference of all blocks for fixing all the complexity indexes of a relative macro block. SOLUTION: First of all, the complexity index of a single block composing of the current macro block is calculated concerning both the styles of 'field' and 'frame'. By adding the maximum value of differences calculated to all the blocks composing of the macro block, entire macro block complexity can be provided. This calculation is repeated twice, namely, concerning the block provided when successive discrete cosine transformations(DCT) are performed in the 'frame' mode, the calculation is performed once on the line of a block corresponding to different semi-fields and the DCT is performed in the 'field' mode. Next, the second calculation is executed.
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Patent Agency Ranking
公开(公告)号：JP2000083257A
公开(公告)日：2000-03-21
申请号：JP22300999
申请日：1999-08-05
Applicant: ST MICROELECTRONICS SRL
Inventor： PAU DANILO , BAGNI DANIELE , PEZZONI LUCA
Abstract: PROBLEM TO BE SOLVED: To obtain the technology for enhancing estimation of a motion in the case of processing a video image for a video compressor and a coder. SOLUTION: In compression and coding of digital data relating to a video sequence consisting of pictures including motion estimation to eliminate temporal redundancy, remarkable advantages of the capability to recognize occurrence of scene changes are obtained, since only estimation of forward motion is used for pictures preceding a scene change and only estimation of backward motion is used for pictures in succession to the scene change of a given sequence to make prediction calculation of pictures. According to this method, a scene change is detected with reliability by checking two separate indices. Thus, accidental detection in the case of pictures with noise, zooming, or other situations that may possibly cause an adverse effect on one or the other index is prevented.
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公开(公告)号：ITVA990006A1
公开(公告)日：2000-09-18
申请号：ITVA990006
申请日：1999-03-18
Applicant: ST MICROELECTRONICS SRL
Inventor： BAGNI DANIELE , GIOVENZANA DAVIDE , PEZZONI LUCA
Abstract: Through a comparison of the values of pixels of a first candidate predictor macroblock having pixels in homologous positions to those of a reference macroblock of identical position on the frame to that of the macroblock being estimated on a reference frame of the present sequence of picture frames, a pre-established cost function is evaluated for each comparison. The best predictor is the one producing the minimum value of cost function. The comparison may even include the summing to each predictor candidate of an update vector of smaller dimensions than the macroblocks, chosen among a plurality of pre-established update vectors, for accelerating the convergence process of the comparison.
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公开(公告)号：DE69937557D1
公开(公告)日：2007-12-27
申请号：DE69937557
申请日：1999-09-03
Applicant: ST MICROELECTRONICS SRL
Inventor： PAU DANILO , PEZZONI LUCA , ROVATI FABRIZIO , SIRTORI DANIELE
Abstract: A method of recognizing a progressive or an interlaced content of video pictures during their processing in a coder, comprises the following operations on at least on one of the components (luminance or chrominance) of the video signal: a) defining a macroblock belonging to a frame of the preceding picture having dimensions R*S pixels, a half of it (R/2)*S being placed on the Top field Tp and the other half on the Bottom field Bp; b) for the chosen component of the video signal, calculating a first pair of coefficients (COEFF_1, COEFF_2) equivalent to the sum, extended to all the columns and to all the even row of said macroblock, of the absolute values of the differences among the values assumed by said component of the video signal in the pixels of the same column and of consecutive rows belonging to the Top semi-frame and Bottom semi-frame, respectively, and the sum, extended to all the columns and to each fourth row of said macroblock, of the absolute values of the differences among the values assumed by said component of the video signal in the pixels of the same column and of consecutive rows of the same parity belonging to the Top semi-frame and Bottom semi-frame respectively; c) verifying whether the first one of the coefficients of said pair is greater than or equal to a prefixed first real positive number of times (a) of the second coefficient, incrementing a first counter (CONT_1) at each positive verification; d) incrementing a second counter (NUM_MACROBLOCK) at each macroblock so tested; e) calculating for each row of each Top semi-frame a second pair of coefficients (COEFF_3, COEFF_4) equivalent to for each row the sum, extended to all the columns of each semi-frame of the absolute values of the differences among the values assumed by said component of the video signal in pixels of the Bottom semi-frame of the preceding picture and of the Bottom semi-frame of the current picture, belonging to the row following the considered row and to the same column, and the sum, extended to all the columns of each semi-frame of the absolute values of the differences among the values assumed by said component of the video signal in pixels of the same column and, respectively, of said row of the Top semi-frame of the preceding picture and the row following the considered row, belonging to the Bottom semi-frame of the current picture, respectively; f) verifying whether the second coefficient of said second pair is grater than or equal to a second prefixed real positive number of times ( beta ) the first coefficient of said second pair, incrementing a third counter (CONT_2) at each positive verification; g) incrementing a fourth counter (NUM_RIGHE) at each row so tested; verifying whether the content of the first counter (CONT_1) is greater than or equal to a third prefixed real positive number of times ( gamma ) the content of second counter (NUM_MACROBLOCK) and whether, at the same time, the content of the third counter (CONT 2) is greater than or equal to a fourth prefixed real positive number of times ( delta ) the content of the fourth counter (NUM_RIGHE): if so, considerating the frame composed of said Top and Bottom semi-frame an interlaced one, if not a progressive one.
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公开(公告)号：IT1313382B1
公开(公告)日：2002-07-23
申请号：ITVA990006
申请日：1999-03-18
Applicant: ST MICROELECTRONICS SRL
Inventor： BAGNI DANIELE , GIOVENZANA DAVIDE , PEZZONI LUCA
Abstract: Through a comparison of the values of pixels of a first candidate predictor macroblock having pixels in homologous positions to those of a reference macroblock of identical position on the frame to that of the macroblock being estimated on a reference frame of the present sequence of picture frames, a pre-established cost function is evaluated for each comparison. The best predictor is the one producing the minimum value of cost function. The comparison may even include the summing to each predictor candidate of an update vector of smaller dimensions than the macroblocks, chosen among a plurality of pre-established update vectors, for accelerating the convergence process of the comparison.
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公开(公告)号：ITVA990006D0
公开(公告)日：1999-03-18
申请号：ITVA990006
申请日：1999-03-18
Applicant: ST MICROELECTRONICS SRL
Inventor： BAGNI DANIELE , GIOVENZANA DAVIDE , PEZZONI LUCA
Abstract: Through a comparison of the values of pixels of a first candidate predictor macroblock having pixels in homologous positions to those of a reference macroblock of identical position on the frame to that of the macroblock being estimated on a reference frame of the present sequence of picture frames, a pre-established cost function is evaluated for each comparison. The best predictor is the one producing the minimum value of cost function. The comparison may even include the summing to each predictor candidate of an update vector of smaller dimensions than the macroblocks, chosen among a plurality of pre-established update vectors, for accelerating the convergence process of the comparison.
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