[특허]SNR scalable video encoding method and corresponding decoding method

[미국특허] SNR scalable video encoding method and corresponding decoding method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-001/66
출원번호	US-0914240 (2000-12-22)
우선권정보	EP-99403308(1999-12-28)
국제출원번호	PCT/EP00/013206 (2000-12-22)
§371/§102 date	20010824 (20010824)
국제공개번호	WO01/049036 (2001-07-05)
발명자 / 주소	Bottreau,Vincent Benetiere,Marion Pesquet Popescu,Beatrice
출원인 / 주소	Koninklijke Philips Electronics N.V.
인용정보	피인용 횟수 : 29 인용 특허 : 4

초록 ▼

The invention relates to scalable video encoders, and, more precisely, to an encoder comprising a base layer and at least an enhancement layer circuit, said circuits being capable of generating enhancement layer video data associated with compressed base layer video data and suitable for transmission to a video decoder. In said encoder, the implemented encoding method, based on a hierarchical triangular mesh representation to which a matching pursuit error coding step is specifically adapted, comprises a base layer encoding step and enhancement layer encoding steps. The invention also relates to a corresponding decoding method.

대표청구항 ▼

What is claimed is: 1. For use in an SNR scalable video encoder comprising, for allowing a progressive transmission of information, a base layer circuit capable of receiving an input stream of video images and generating therefrom compressed base layer video data suitable for transmission to a video decoder and at least an enhancement layer circuit capable of generating therefrom enhancement layer video data associated with the compressed base layer video data and suitable for transmission to the video decoder, an encoding method based on a hierarchical triangular mesh representation to which a matching pursuit error coding step is specifically adapted, said encoding method comprising the following steps: a base layer encoding step, provided for receiving a couple of reference and current images N-1 and N and a coarse mesh and encoding by means of a matching pursuit method the error residual image ε1 between the current image N and an associated motion compensated image Nc1; a first enhancement layer encoding step, provided for receiving said current image and a reconstructed image N'c1 obtained by adding to the motion compensated image Nc1 the motion residual image reconstructed from the coded error residual image ε1, and for generating from the difference between said current image and said reconstructed image Nc'1 a new error residual image ε'1 used to refine the current level mesh "Mesh 1" towards a new mesh "Mesh 2" then taken as input for a further level, the information concerning the mesh distortion being contained in motion vectors MVi containing only new nodes at each level i; and at least another enhancement layer encoding step including similar receiving and generating operations; the matching pursuit method being applied during each encoding step to the error residual image εi in view of the transmission of the image texture information in the form of atoms. 2. An SNR scalable video encoder comprising, for allowing a progressive transmission of information: a base layer circuit capable of receiving an input stream of video images and generating therefrom compressed base layer video data suitable for transmission to a video decoder; and at least an enhancement layer circuit capable of generating therefrom enhancement layer video data associated with the compressed base layer video data and suitable for transmission to the video decoder, said encoder being configured for encoding based on a hierarchical triangular mesh representation to which a matching pursuit error coding step is specifically adapted, said encoding comprising the acts of: receiving a couple of reference and current images N-1 and N and a coarse mesh and encoding by means of a matching pursuit method the error residual image ε1 between the current image N and an associated motion compensated image Nc1, thereby forming a base layer; receiving said current image and a reconstructed image N'c 1 obtained by adding to the motion compensated image Nc1 the motion residual image reconstructed from the coded error residual image ε1, and generating from the difference between said current image and said reconstructed image Nc'1 a new error residual image ε'1 used to refine the current level mesh "Mesh 1" towards a new mesh "Mesh 2" then taken as input for a further level, the information concerning the mesh distortion being contained in motion vectors MVi containing only new nodes at each level i thereby forming a first enhancement layer; and forming at least another enhancement layer by performing respective receiving and generating operations; the matching pursuit method being applied during each of said acts to the error residual image εi in view of the transmission of image texture information in the form of atoms.

이 특허에 인용된 특허 (4) 인용/피인용 타임라인 분석

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[미국특허] SNR scalable video encoding method and corresponding decoding method 원문보기

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[미국특허] SNR scalable video encoding method and corresponding decoding method 원문보기

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