-
公开(公告)号：JP2002077916A
公开(公告)日：2002-03-15
申请号：JP2001211091
申请日：2001-07-11
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FARYAR ALIREZA FARID , SEN MOUSHUMI , YANG KYEONG HO
Abstract: PROBLEM TO BE SOLVED: To provide a transform-based coding technique capable of reducing the coding loss introduced during repetitive coding/decoding processing. SOLUTION: The chain type N level transform coding provides a transform- based coding method without loss using an original restrained quantization and inverse quantization processes. This greatly reduces the coding loss introduced during chained coding (repetition of coding and decoding) of video/picture signals. The transform is an appropriate inversely-transformable block transform e.g. Hadamard transform 408. The restrained quantization and inverse quantization method 410 is used in a decoder to thereby perform an approximately chained coding without loss. The quantization operation applied to block transform coefficients is a conditioning i.e., the quantization operation result depends on quantization coefficient values inputted to the coder.
-
公开(公告)号：JP2001204031A
公开(公告)日：2001-07-27
申请号：JP2000366551
申请日：2000-12-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SEN MOUSHUMI , FARYAR ALIREZA FARID , HO YANG KYEONG
IPC: H03M7/30 , H04N7/26 , H04N7/30 , H04N19/593
Abstract: PROBLEM TO BE SOLVED: To enhance a compression technology for block conversion coding, which does not give information relating to a coding parameter to a decoder. SOLUTION: The method used for a coding system on a block conversion basis that processes a block conversion coefficient relating to visual data of at least one block, includes a step where the block conversion coefficient reconfigured before relating to the visual data is specified and a step where a context selection value used to process the block conversion coefficient relating to at least one block is calculated on the basis of the block conversion coefficient reconfigured before.
-
公开(公告)号：JP2002152741A
公开(公告)日：2002-05-24
申请号：JP2001223870
申请日：2001-07-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ALIREZA FARID FARYAR , SEN MOUSHUMI , AN YAN , KYEONG HO YANG
Abstract: PROBLEM TO BE SOLVED: To provide an efficient sharing of a hardware processing stage in processing samples from a plurality of independent input sequences that are grouped prior to application to the processing arrangement by an efficient hardware architecture and processing method. SOLUTION: By applying a signal sequence Yi: j=0, 1, 2,..., MN-1} obtained by interleaving M-sets of signal sequences Xi,j: J-0, 1, 2,..., N-1; i=1, 2,..., M}, a sophisticated processing engine efficiency and/or reduction in the delay to receive the new input sample is achieved. Thus, the processing of the sample Yj is immediately started when the processing of the sample Yj-M is finished. Accordingly, a pipeline stage delay Dp can efficiently by reduced to 1/M (from Dmax to Dmax/M) and the number (or an equivalently required time) of required engines can similarly be reduced to 1/M).
-
公开(公告)号：JP2001028756A
公开(公告)日：2001-01-30
申请号：JP2000169846
申请日：2000-06-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FARYAR ALIREZA FARID , SEN MOUSHUMI , YANG KYEONG HO
Abstract: PROBLEM TO BE SOLVED: To provide a method for selecting a coding mode for a video sequence by deciding whether inter-frame coding is executed or intra-frame coding is executed on the present part of a video sequence, based on only a sample reproduced before it is associated with the video sequence. SOLUTION: The coding mode selector 112 of an encoder is connected to a present frame memory 118. For selecting a coding mode, only a previously reproduced value (sample) from the present frame memory 118 and a previously reproduced value (sample) from a reference frame memory 122 are received. The coding mode selector 112 forms templates from the present frame memory 118 and the reference frame memory 122 and compares pixel intensity values associated with the pixels in the respective templates. For selecting the mode, the value of the reproduced sample is used.
-
公开(公告)号：CA2348238A1
公开(公告)日：2002-01-13
申请号：CA2348238
申请日：2001-05-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FARYAR ALIREZA FARID , YANG KYEONG HO , SEN MOUSHUMI
Abstract: Methods and apparatus for performing near lossless-concatenated N-level constrained quantization Hadamard transform decoding are provided. Accordingly, the present invention provides a transform-based coding technique, where the coding loss introduced during repeated encoding and decoding is reduced to a substantial ly insignificant level. This is accomplished by employing a constrained quantization and inverse quantization operation in each level of encoding/decoding in the decoder. In this manner, the concatenation error between each level of a decoder is reduced to a substantially minimum level and the quantization error introduced during quantization operations, i.e., originally at the encoder and in each level of the decoder, is substantially reduced. Thus, the decoded bit stream that is output at the N-th level of the decoder is substantially the same as the original bit stream provided to the input of the encoder.
-
Patent Agency Ranking
公开(公告)号：CA2310341A1
公开(公告)日：2000-12-07
申请号：CA2310341
申请日：2000-05-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SEN MOUSHUMI , YANG KYEONG HO , FARYAR ALIREZA FARID
Abstract: A method is provided for use in a video processing system for selecting between an inter-frame coding mode and an intra-frame coding mode when processing a current portion of a video sequence. The method includes identifying previously reconstructed samples associated with the current portion from a current frame and a reference frame of the video sequence. Then, a selection is made whether to implement the inter-frame coding technique or the intra-frame coding technique on the current portion based on comparisons associated with the previously reconstructed samples. The method may be implemented in both a video encoder and a video decoder. As a result, the encoder does not need to transmit coding mode-related overhead information to a corresponding decoder. By way of example, the invention may be implemented in a pixel-based coding system or a block transform-based coding system.
-
公开(公告)号：DE60027955T2
公开(公告)日：2007-01-25
申请号：DE60027955
申请日：2000-05-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FARYAR ALIREZA FARID , SEN MOUSHUMI , YANG KYEONG HO
Abstract: A method is provided for use in a video processing system for selecting between an inter-frame coding mode and an intra-frame coding mode when processing a current portion of a video sequence. The method includes identifying previously reconstructed samples associated with the current portion from a current frame and a reference frame of the video sequence. Then, a selection is made whether to implement the inter-frame coding technique or the intra-frame coding technique on the current portion based on comparisons associated with the previously reconstructed samples. The method may be implemented in both a video encoder and a video decoder. As a result, the encoder does not need to transmit coding mode-related overhead information to a corresponding decoder. By way of example, the invention may be implemented in a pixel-based coding system or a block transform-based coding system.
-
公开(公告)号：DE60100026D1
公开(公告)日：2002-10-24
申请号：DE60100026
申请日：2001-05-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FARYAR ALIREZA FARID , SEN MOUSHUMI , YANG KYEONG HO
Abstract: Methods and apparatus for performing near lossless-concatenated N-level constrained quantization Hadamard transform decoding are provided. Accordingly, the present invention provides a transform-based coding technique, where the coding loss introduced during repeated encoding and decoding is reduced to a substantially insignificant level. This is accomplished by employing a constrained quantization and inverse quantization operation in each level of encoding/decoding in the decoder. In this manner, the concatenation error between each level of a decoder is reduced to a substantially minimum level and the quantization error introduced during quantization operations, i.e., originally at the encoder and in each level of the decoder, is substantially reduced. Thus, the decoded bit stream that is output at the N-th level of the decoder is substantially the same as the original bit stream provided to the input of the encoder.
-
公开(公告)号：DE60027955D1
公开(公告)日：2006-06-22
申请号：DE60027955
申请日：2000-05-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FARYAR ALIREZA FARID , SEN MOUSHUMI , YANG KYEONG HO
Abstract: A method is provided for use in a video processing system for selecting between an inter-frame coding mode and an intra-frame coding mode when processing a current portion of a video sequence. The method includes identifying previously reconstructed samples associated with the current portion from a current frame and a reference frame of the video sequence. Then, a selection is made whether to implement the inter-frame coding technique or the intra-frame coding technique on the current portion based on comparisons associated with the previously reconstructed samples. The method may be implemented in both a video encoder and a video decoder. As a result, the encoder does not need to transmit coding mode-related overhead information to a corresponding decoder. By way of example, the invention may be implemented in a pixel-based coding system or a block transform-based coding system.
-
公开(公告)号：CA2348306A1
公开(公告)日：2002-01-25
申请号：CA2348306
申请日：2001-05-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FARYAR ALIREZA FARID , SEN MOUSHUMI , YAN AN , YANG KYEONG HO
Abstract: An efficient hardware architecture and processing method permit pipelined processing stages to be shared in processing samples from a plurality of independent input sequences that are grouped prior to application to the processing arrangement. A high degree of processing engine efficiency and/or reduced delay for accepting new input samples are achieved by applying the signal sequence, {Y j: j=0,1,2,...,MN 1}, obtained by interleaving M signal sequences {Xij: j=0,1,2,...,N-1}, i=1,2,...M}. Thus, processing of sample Yj can start as soon as processing o f sample Yj-M is finished. Accordingly, effective pipeline stage delay, Dp, can be reduced by a factor of M (from D max to D max /M) and the number of required engines (or, equivalently, required time) can be reduced by the same factor M.
-
-
-
-
-
-
-
-
-
Search Results
13
records
(took 0.021 seconds)
