Video Compression using Wyner-Ziv Codes

Predictive coding is posed as a variant of the Wyner-Ziv coding, and problems in source and channel coding of video are addressed in this framework.

Predictive Multiple Description Coding using Wyner-Ziv Codes

Two-channel predictive multiple description coding is posed as a variant of the Wyner-Ziv coding problem. Practical code constructions are proposed within this framework, and the performance of the proposed codes is compared with conventional approaches, for communication of a first-order Gauss-Markov source over erasure channels with independent failure probabilities.Multiple Description (MD) coding of predictively coded sources is of practical interest in several multimedia applications such as redundant storage of video/audio data, and real-time video/audio telephony. A key problem associated with predictive MD coding is the occurrence of predictive mismatch. In the present paper, we pose the problem of predictive MD coding as a variant of the Wyner-Ziv decoder side-in formation problem. We propose an approach based on the use of coset codes for predictive MD coding, which avoids predictive mismatch without requiring restrictive channel assumptions or high latency. We specifically consider two-channel predictive MD coding of a first-order Gauss-Markov process.

Related Publications:

• A. Jagmohan, A. Sehgal, N. Ahuja, WYZE-PMD based Multiple Description Video Codec, Proc. IEEE Int. Conf. Multimedia Expo, 2003.
• A. Jagmohan, N. Ahuja, Wyner-Ziv Encoded Predictive Multiple Descriptions, Proc. Data Compression Conference, p. 213 2003.
• A. Jagmohan, A. Sehgal, N. Ahuja, Predictive Encoding using Coset Codes, Proc. IEEE Int. Conf. Image Processing, pp. I-29-32, 2002.