A comparison of layering and stream replication video multicast schemes
NOSSDAV '01 Proceedings of the 11th international workshop on Network and operating systems support for digital audio and video
A novel unbalanced multiple description scheme for video transmission over WLAN
Proceedings of the 3rd ACM international workshop on Wireless mobile applications and services on WLAN hotspots
Unbalanced multiple-description video coding with rate-distortion optimization
EURASIP Journal on Applied Signal Processing
Efficient motion vector recovery algorithm for H.264 based on a polynomial model
IEEE Transactions on Multimedia
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
Balanced multiple description video coding using optimal partitioning of the DCT coefficients
IEEE Transactions on Circuits and Systems for Video Technology
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This paper describes a technique based on Unbalanced Multiple Description Coding to improve the robustness of video transmission. The proposed system relies on two descriptions, HR (High-Resolution) and LR (Low-Resolution) where LR is primarily used as redundancy. HR and LR are produced by using different encoding parameters. HR has constant frame rate and is encoded in such a way to optimize video quality. LR, on the other hand, uses only intra frames and its frame rate is dynamically adapted to the amount of motion. Using only intra frames in LR allows fast encoding/decoding time and provides resilience to bursts of packet losses. This technique produces acceptable quality even if redundancy percentage is less than packet loss rate. Therefore this approach is suitable for multicast video distribution over wireless links where estimating packet loss can be a difficult task because different receivers experience different loss patterns.