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1. CN101677405 - Method and system for transcoding based robust streaming of compressed video

Office Chine
Numéro de la demande 200910173445.9
Date de la demande 16.09.2009
Numéro de publication 101677405
Date de publication 24.03.2010
Numéro de délivrance 101677405
Date de délivrance 16.10.2013
Type de publication B
CIB
H04N 7/50
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
7Systèmes de télévision
24Systèmes pour la transmission de signaux de télévision utilisant la modulation par impulsions codées
26utilisant la réduction de la largeur de bande
50comportant un codage par transformation et par prédiction
H04N 7/26
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
7Systèmes de télévision
24Systèmes pour la transmission de signaux de télévision utilisant la modulation par impulsions codées
26utilisant la réduction de la largeur de bande
CPC
H04N 19/577
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
503involving temporal prediction
51Motion estimation or motion compensation
577Motion compensation with bidirectional frame interpolation, i.e. using B-pictures
H04N 19/40
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
40using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
H04N 19/51
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
50using predictive coding
503involving temporal prediction
51Motion estimation or motion compensation
H04N 19/89
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
19Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
85using pre-processing or post-processing specially adapted for video compression
89involving methods or arrangements for detection of transmission errors at the decoder
Déposants 香港科技大学
Inventeurs 区子廉
范晓鹏
Mandataires 北京天昊联合知识产权代理有限公司 11112
北京天昊联合知识产权代理有限公司 11112
Données relatives à la priorité 61/136,621 19.09.2008 US
Titre
(EN) Method and system for transcoding based robust streaming of compressed video
(ZH) 针对压缩视频的基于转码的鲁棒性流媒体技术和系统
Abrégé
(EN)
Described herein is a novel transcoding technique called lossless inter frame transcoding (LIFT) for improving the error resilience of video streaming. According to various embodiments, conventional coded blocks are selectively transcoded into new transcoded block. At the decoder, the transcoded block can be transcoded back to the conventional coded block when the prediction is available and can also be robustly decoded independently when the prediction is unavailable. According to another embodiment, an offline transcoding and online composing technique is provided for generating a compositeframe using the transcoded and conventional coded blocks and adjusting the ratio of the transcoded blocks, thereby achieving error robustness scalability.

(ZH)

本发明描述了一种用于提高视频传输的抗误码能力的被称为无损帧间转码技术(LIFT)的新型转码技术。根据多个实施例,传统编码块被有选择地转码为新的转码块。在解码端,当能获得预测图像时,转码块可被转码回传统编码块。当不能获得预测图像时,转码块仍然可以独立地被鲁棒性的解码。根据另一实施例,提供了一种离线转码在线合成技术。该技术用转码块和传统编码块生成出一个复合帧,并且可调节转码块的比例,以此获得可伸缩的抗误码能力。