A low bit-rate video coding algorithm based on blocking regional wavelet transform with border processing

A novel video coding scheme based on blocking regional wavelet transform and overlapped motion compensation is researched in this paper. Several new or improved algorithms are proposed. (a)The high energy legions of interframe predicted difference are first detected using hierarchical sliding-window region forming algorithm. The regional border is processed to reduce ringing-effects. Wavelet decomposition and quantization are carried out only for these regions. (b)A quantization model based on HVS spatiality-frequency and time-frequency feature is used in coding algorithm. (c)An improved single-pass scanned zero-tree is employed to represent quantized wavelet coefficients. This scheme reduce bit rate about 36%-51% or get distinct improvement in decoding video quality with cutting down ringing-effects at the same bit rate compared with traditional wavelet-based coding algorithms; Simulation results show acceptable image quality for CIF resolution at low bit-rate and very-low bit-rate.