公开(公告)号：CA2481902A1

公开(公告)日：2003-10-23

申请号：CA2481902

申请日：2003-04-09

Applicant: QUALCOMM INC

Inventor： RATZEL JOHN ,  IRVINE ANN C ,  GOVINDASWAMY SENTHIL

IPC: G06T9/00 ,  H04N19/89 ,  H04N7/12

Abstract: An apparatus and method for the detection of errors in compressed digital image is disclosed (Fig.2). In one embodiment, a signature is generated usin g a multiple input shift register and added to the compressed information (210 ). The signature is verified at the decoder to detect an error in the compresse d information. Other information such as the frame number and/or color compone nt type of the compressed image can also be verified to detect errors in the compressed information. In other embodiments, the decoder detects errors if there are bits remaining after decompression and/or if there are invalid cod es at decompression (215). Once an error is detected, the compressed informatio n can be discarded or re-sent and processed. Therefore, the detection of error s can significantly enhance at least the reliance of systems such as digital cinema that require compression of large amounts of data.

公开(公告)号：AU2004220878B2

公开(公告)日：2010-01-21

申请号：AU2004220878

申请日：2004-03-17

Applicant: QUALCOMM INC

Inventor： IRVINE ANN C ,  RAVEENDRAN VIJAYALAKSHMI R

IPC: G06T5/00 ,  H04N7/26

Abstract: Embodiments describe a method, apparatus and system for processing images using block based compression. In one embodiment, a method comprises determining whether two blocks are neighboring blocks, determining whether the two neighboring blocks are both subdivided, if the two blocks are neighboring blocks; performing deblocking filtering on one or more edge pixels of the two neighboring blocks, if it is determined that both of the two neighboring blocks are not subdivided.

公开(公告)号：UA87660C2

公开(公告)日：2009-08-10

申请号：UA2005009654

申请日：2004-03-17

Applicant: QUALCOMM INC

Inventor： RAVEENDRAN VIJAYALAKSHMI R ,  IRVINE ANN C

IPC: G06K9/40 ,  H04N1/409

Abstract: Описаныспособ, устройствои системадляобработкиизображений, сиспользованиемоснованногонаблокахсжатия. Способвключаетопределениетого, являютсялидваблокасоседнимиблоками, определениетого, являютсялиобасоседнихблокаразделенными, еслидваблокаявляютсясоседнимиблоками, выполнениефильтрацииблочногосглаживаниянаодномилибольшемколичествекраевыхпикселейдвухсоседнихблоков, еслиопределено, чтообасоседнихблокаявляютсянеразделенными.

公开(公告)号：ZA200507507B

公开(公告)日：2007-06-27

申请号：ZA200507507

申请日：2005-09-16

Applicant: QUALCOMM INC

Inventor： RAVEENDRAN VIJAYALAKSHMI R ,  IRVINE ANN C

IPC: G06K20090101

公开(公告)号：AR043643A1

公开(公告)日：2005-08-03

申请号：ARP040100894

申请日：2004-03-17

Applicant: QUALCOMM INC

Inventor： IRVINE ANN C ,  RAVEENDRAN VIJAYALAKSHMI

IPC: H04N1/58 ,  H04N1/415

Abstract: Un método, aparato y sistema para procesar imágenes en base a la compresión basada en bloques. En una forma de realización, un método comprende determinar si dos bloques son bloques vecinos, determinar si ambos bloques vecinos están ambos subdivididos, si ambos bloques son bloques vecinos, llevar a cabo el filtrado de desbloqueo en uno o más pixeles de borde de ambos bloques vecinos, si de determina que ambos bloques vecinos están sin subdividir

公开(公告)号：HK1067953A1

公开(公告)日：2005-04-22

申请号：HK05100204

申请日：2005-01-11

Applicant: QUALCOMM INC

Inventor： THYAGARAJAN KADAYAM ,  IRVINE ANN C

IPC: H04N7/30 ,  G06F20100101 ,  H03M7/30 ,  H04N1/41 ,  H04N7/26 ,  H04N7/50

Abstract: A method of losslessly decoding signals representing an image is claimed. A lossy compressed data file and a residual compressed data file are received. The lossy compressed data file is separated into DC coefficients and AC coefficients, and decoded, separately, to the determine DC values and the AC values. The DC values and the AC values are inverse quantized to produce lossy, decompressed data. The residual compressed data file is decoded to produce a residual decompressed data. The lossy decompressed frequency data is combined with the residual decompressed data to produce a lossless data file, wherein the lossless data file is substantially the same as the original image.

公开(公告)号：AU2004220878A1

公开(公告)日：2004-09-30

申请号：AU2004220878

申请日：2004-03-17

Applicant: QUALCOMM INC

Inventor： IRVINE ANN C ,  RAVEENDRAN VIJAYALAKSHMI R

IPC: G06T5/00 ,  H04N7/26 ,  G06K9/40

Abstract: Embodiments describe a method, apparatus and system for processing images using block based compression. In one embodiment, a method comprises determining whether two blocks are neighboring blocks, determining whether the two neighboring blocks are both subdivided, if the two blocks are neighboring blocks; performing deblocking filtering on one or more edge pixels of the two neighboring blocks, if it is determined that both of the two neighboring blocks are not subdivided.

公开(公告)号：AU2003291058A1

公开(公告)日：2004-06-15

申请号：AU2003291058

申请日：2003-11-17

Applicant: QUALCOMM INC

Inventor： IRVINE ANN C ,  RAVEENDRAN VIJAYALAKSHMI R

IPC: G06T9/00 ,  H04N7/12 ,  H04N7/26 ,  H04N7/30

Abstract: Apparatus and method for generating multiple descriptions of compressed data is disclosed. In the apparatus and method, transform coefficients are generated from input data and quantized. An energy distribution of the quantized transform coefficients is generated. Based on the energy distribution, the transform coefficients are grouped into layers. By entropy coding different number of layers, multiple descriptions of compressed data are generated.

公开(公告)号：AU2003257045A1

公开(公告)日：2004-02-16

申请号：AU2003257045

申请日：2003-07-29

Applicant: QUALCOMM INC

Inventor： GOVINDASWAMY SENTHIL ,  FUDGE BRIAN T ,  IRVINE ANN C ,  THYAGARAJAN KADAYAM S

IPC: H04N7/30 ,  G06K9/36 ,  G06T9/00 ,  H03M7/30 ,  H04N1/41 ,  H04N1/413 ,  H04N7/26 ,  H04N7/50 ,  H04B1/66 ,  H04N7/12

Abstract: An apparatus and method for limiting bit rate of compressed data is disclosed. The apparatus and method allows the generation of parameters for encoding digital image data based on the data bit rate resulting from the use of different parameters. In one embodiment, a statistical analysis is performed to determine the different parameters. The use of parameters results in a bit rate that would prevent a decoder to stall during decompression while allowing the encoder compress without affecting the quality. Therefore, a more efficient encoding and decoding can be achieved.

公开(公告)号：WO2004046879A3

公开(公告)日：2005-08-25

申请号：PCT/US0336828

申请日：2003-11-17

Applicant: QUALCOMM INC

Inventor： IRVINE ANN C ,  RAVEENDRAN VIJAYALAKSHMI R

IPC: G06T9/00 ,  H04N7/12 ,  H04N7/26 ,  H04N7/30 ,  H03M7/00

CPC classification number: G06T9/005 ,  H04N19/122 ,  H04N19/124 ,  H04N19/129 ,  H04N19/15 ,  H04N19/176 ,  H04N19/18 ,  H04N19/187 ,  H04N19/39 ,  H04N19/40 ,  H04N19/60 ,  H04N19/63

Abstract: Apparatus and method for generating multiple descriptions of compressed data is disclosed. In the apparatus and method, transform coefficients are generated from input data and quantized. An energy distribution of the quantized transform coefficients is generated. Based on the energy distribution, the transform coefficients are grouped into layers. By entropy coding different number of layers, multiple descriptions of compressed data are generated.

Abstract translation: 公开了用于产生压缩数据的多个描述的装置和方法。 在装置和方法中，从输入数据生成变换系数并进行量化。 产生量化变换系数的能量分布。 基于能量分布，变换系数被分组成层。 通过熵编码不同层数，生成压缩数据的多个描述。