Video Compression Encoding and Decoding Mechanism of H.264 Based on FPGA
Abstract: In distributed-type
video encoding, temporal correlation between key frames is not utilized. Based on
this, selection method of encoding mode of key frames is put forward, which is
based on band allocation. First, divide coefficient tape gained by key frames
after FPGA conversion into low-frequencyband and high-frequency band. Part of
low-frequency band adopts H.264 encoding and decoding. Then make further
selection to encoding mode of high-frequency band. H.264 encoding and decoding
andtraditional intra-frame encoding and decoding are carried out respectively.
Finish selection of encodingmode at decoding end. At last transmit selection of
encoding mode to encoding end through feedback channel. Simulation result shows
that under the circumstance that complexity at encoding end is notadded, method
put forward has improved quality of video after decoding, enhancing peak signal
to noise ratio (PSNR) of system by about 1-5bB.
Author: Yanyu Wang, Shirin
Malekpour
Journal Code: jptkomputergg160078
