公开(公告)号：DE69233411D1

公开(公告)日：2004-10-21

申请号：DE69233411

申请日：1992-10-23

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  VISCITO ERIC

IPC: H04N7/32 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/50

Abstract: A system and methods are disclosed for implementing an encoder suitable for use with the proposed ISO/IEC MPEG standards including three cooperating components or subsystems that operate to variously adaptively pre-process the incoming digital motion video sequences, allocate bits to the pictures in a sequence, and adaptively quantize transform coefficients in different regions of a picture in a video sequence so as to provide optimal visual quality given the number of bits allocated to that picture.

公开(公告)号：DE69226749D1

公开(公告)日：1998-10-01

申请号：DE69226749

申请日：1992-10-19

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  RAMM DOV ,  VISCITO ERIC

IPC: H04N7/30 ,  G06T9/00 ,  H04N7/26 ,  H04N7/50 ,  H04N7/24

Abstract: A system and methods for processing a stream of video image data so as to create a video representation that multiplexes data corresponding to resolution or bitstream scales. This representation is such that the identity of the basic MacroBlock (MB) structure of the MPEG-1 ISO standard is preserved across all resolution and bitstream scales, e.g., by scaling across four levels of resolution. An MB is associated with a series of attributes which contribute to the amount of overhead data incorporated in an MPEG-1 compressed data stream, so that by preserving the MB identity across multiple resolutions and bitstream scales, these scales can share this overhead, thus requiring it to be included only once in the data stream. Preserving the MB identity also simplifies significantly the derivation of motion estimation vector data for all resolution scales other than the highest resolution. Essentially the motion vector data corresponding to any resolution scale can be derived from the highest resolution motion vector data by appropriately scaling it down.

公开(公告)号：DE69230704D1

公开(公告)日：2000-03-30

申请号：DE69230704

申请日：1992-10-23

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  VISCITO ERIC

IPC: H04N7/32 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/50 ,  H04N7/24

Abstract: A system and methods are disclosed for implementing an encoder suitable for use with the proposed ISO/IEC MPEG standards including three cooperating components or subsystems that operate to variously adaptively pre-process the incoming digital motion video sequences, allocate bits to the pictures in a sequence, and adaptively quantize transform coefficients in different regions of a picture in a video sequence so as to provide optimal visual quality given the number of bits allocated to that picture.

公开(公告)号：DE69026896D1

公开(公告)日：1996-06-13

申请号：DE69026896

申请日：1990-09-13

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  MCCARTHY THOMAS

IPC: G06T9/00 ,  H03M7/30 ,  H04N1/41 ,  H04N1/415 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/50 ,  H04N9/77 ,  H04N11/02 ,  H04N11/04

Abstract: A system and method for improving the quality of decoded images, without any cost to compression efficiency, in both progressive still frame and motion video applications wherein the images are coded with intraframe transform based coding techniques, such as Discrete Cosine Transform (DCT) coding. Prediction of the AC components is utilized and operations are performed on the AC coefficient prediction in the decoder portions of the system in combination with a thresholding technique. Input images are subdivided into blocks of pixels, which are changed into blocks of coefficients by forward transform coding resulting in DC coefficients, representative of the average value in a block of pixels, and AC coefficients, representative of harmonic frequencies in a block of pixels. AC coefficient prediction is performed using both DC and AC coefficients from the block, whereupon the predicted coefficient values are thresholded and the thresholded coefficient values are added to their corresponding transform coefficient values for the given block. These steps are repeated for all of the blocks of the image and the image representation is recovered by applying an inverse transform operation to the results of all of the additions for all of the blocks of the image.

公开(公告)号：DE69233411T2

公开(公告)日：2005-09-22

申请号：DE69233411

申请日：1992-10-23

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  VISCITO ERIC

IPC: H04N7/32 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/50

Abstract: A system and methods are disclosed for implementing an encoder suitable for use with the proposed ISO/IEC MPEG standards including three cooperating components or subsystems that operate to variously adaptively pre-process the incoming digital motion video sequences, allocate bits to the pictures in a sequence, and adaptively quantize transform coefficients in different regions of a picture in a video sequence so as to provide optimal visual quality given the number of bits allocated to that picture.

公开(公告)号：SG43737A1

公开(公告)日：1997-11-14

申请号：SG1996000346

申请日：1993-03-05

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  HORVATH THOMAS AKOS ,  KREITZER NORMAN HENRY ,  LEAN ANDY GENG-CHYUN ,  MCCARTHY THOMAS

IPC: G06F17/14 ,  G06T1/20 ,  G06F9/38 ,  G06T1/60 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/32 ,  H04N7/50 ,  H04N7/54 ,  G06F15/66 ,  G06F15/64

Abstract: A sequential process-pipeline (12) has a first processing stage (30) coupled to a CODEC (24) through a plurality of buffers, including an image data input buffer (28), an image data output buffer (26), and an address buffer (34). The address buffer stores addresses, each of which identifies an initial address of a block of addresses within an image memory (22). Each block of addresses in the image memory stores a block of decompressed image data. A local controller (18) is responsive to the writing of an address into the address buffer to initiate the operation of the CODEC to execute a Discrete Cosine Transformation Process and a Discrete Cosine Transformation Quantization Process.

公开(公告)号：DE69230704T2

公开(公告)日：2000-08-31

申请号：DE69230704

申请日：1992-10-23

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  VISCITO ERIC

IPC: H04N7/32 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/50 ,  H04N7/24

Abstract: A system and methods are disclosed for implementing an encoder suitable for use with the proposed ISO/IEC MPEG standards including three cooperating components or subsystems that operate to variously adaptively pre-process the incoming digital motion video sequences, allocate bits to the pictures in a sequence, and adaptively quantize transform coefficients in different regions of a picture in a video sequence so as to provide optimal visual quality given the number of bits allocated to that picture.

公开(公告)号：DE69226749T2

公开(公告)日：1999-04-15

申请号：DE69226749

申请日：1992-10-19

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  RAMM DOV ,  VISCITO ERIC

IPC: H04N7/30 ,  G06T9/00 ,  H04N7/26 ,  H04N7/50 ,  H04N7/24

Abstract: A system and methods for processing a stream of video image data so as to create a video representation that multiplexes data corresponding to resolution or bitstream scales. This representation is such that the identity of the basic MacroBlock (MB) structure of the MPEG-1 ISO standard is preserved across all resolution and bitstream scales, e.g., by scaling across four levels of resolution. An MB is associated with a series of attributes which contribute to the amount of overhead data incorporated in an MPEG-1 compressed data stream, so that by preserving the MB identity across multiple resolutions and bitstream scales, these scales can share this overhead, thus requiring it to be included only once in the data stream. Preserving the MB identity also simplifies significantly the derivation of motion estimation vector data for all resolution scales other than the highest resolution. Essentially the motion vector data corresponding to any resolution scale can be derived from the highest resolution motion vector data by appropriately scaling it down.

公开(公告)号：SG43716A1

公开(公告)日：1997-11-14

申请号：SG1996000128

申请日：1992-10-19

Applicant: IBM

Inventor： GONZALES CESAR AUGUSTO ,  RAMM DOV ,  VISCITO ERIC

IPC: G06T9/00 ,  H04N7/30 ,  H04N7/26 ,  H04N7/50 ,  H04N7/24

Abstract: A system and methods for processing a stream of video image data so as to create a video representation that multiplexes data corresponding to resolution or bitstream scales. This representation is such that the identity of the basic MacroBlock (MB) structure of the MPEG-1 ISO standard is preserved across all resolution and bitstream scales, e.g., by scaling across four levels of resolution. An MB is associated with a series of attributes which contribute to the amount of overhead data incorporated in an MPEG-1 compressed data stream, so that by preserving the MB identity across multiple resolutions and bitstream scales, these scales can share this overhead, thus requiring it to be included only once in the data stream. Preserving the MB identity also simplifies significantly the derivation of motion estimation vector data for all resolution scales other than the highest resolution. Essentially the motion vector data corresponding to any resolution scale can be derived from the highest resolution motion vector data by appropriately scaling it down.