A low latency coding scheme for compressing reference frame in video codec

摘要

Designing ultra-low latency coding algorithms has been the key concern for the development of live video system. In the current video coding standards, the capacities of frame memory and bus bandwidth are the major aspects that affect the performance of encoder and decoder. To address this issue, this paper proposes a low-latency reference frame compression algorithm, which utilizes spatial correlation of frame to improve the throughput of frame memory. The proposed approach makes effective use of spatial correlation between pixels through special compression's order, and employs Golomb-Rice coding approach to encode the magnitude of pixel difference optimally according to its occurring frequency.