Title :
A new algorithm and its implementation for frame recompression
Author_Institution :
Hynix Semicond. Inc, Seoul, South Korea
fDate :
11/1/2001 12:00:00 AM
Abstract :
An algorithm and its implementation to recompress video frame data, which is to be stored into external memory, are proposed, thereby enabling reduction of memory requirements and bandwidth. To support random access capability, frames are organized as 1×8-pixel arrays, which are then compressed into 32-bit segments. The compression ratio is fixed at 50%. For both compression efficiency and low complexity, the modified Hadamard transform (MHT) and Golomb-Rice (GR) coding are utilized. Objective and subjective video quality assessments are performed. Efficient hardware designs including Golomb-Rice encoding/decoding and packing/unpacking are also proposed to reduce the total compression/decompression latency cycles. The proposed hardware designs are suitable for the integration with MPEG-2 decoders thanks to fast operation and simple interface logic
Keywords :
CMOS digital integrated circuits; Hadamard transforms; data compression; digital signal processing chips; entropy codes; integrated circuit design; video coding; 32 bit; CMOS IC; GR coding; Golomb-Rice coding; Golomb-Rice encoding/decoding; MHT; MPEG-2 decoders; bandwidth; compression efflciency; compression ratio; compression/decompression latency cycles; hardware designs; interface logic; memory requirements; modified Hadamard transform; packing/unpacking; random access capability; video frame data; video quality assessments; Bandwidth; Decoding; Delay; Encoding; Error correction; Error correction codes; Hardware; Quality assessment; Transform coding; Video compression;
Journal_Title :
Consumer Electronics, IEEE Transactions on
