Hybrid variable length coding for video compression

Abstract From the Canadian patent

A method for variable length coding an ordered series of digital signals e.g. of quantized , transform coefficients of a block of image data with a most likely-to-occur amplitude, e.g. 0, and at least one other amplitude e.g. 1, to form a set of codewords. The method includes , establishing a breakpoint along the ordering to define a first contiguous region and a second , contiguous region such that clusters of consecutive signals of any value other than the most , likely-to-occur value occur mostly in the first contiguous region. The method includes , encoding the signals in the first region using a first region encoding method suitable for , encoding clusters; and encoding the …