Implementation of Context Adaptive Variable Length Coder for H.264 Video Encoder

This paper proposes the implementation of context adaptive variable length coder for H.264 video encoder. The implementation is capable of bringing about compression of video sequences as per user specification and is capable of processing high resolution pictures of sizes of up to 1024 x 768 pixels, encoding at a real time frame rate of 25 fps. The variable length coder has been realized using Verilog RTL coding. The compression achieved by the implementation is over 10 and the reconstructed picture quality is better than 35 dB. The quantized coefficient inputs to the context adaptive variable length coder is generated by the integer transform and quantization processor coded in Verilog reported in an earlier work. In order to get the reconstructed picture, context adaptive variable length decoder, inverse quantization and inverse integer transform have been realized using Matlab.