| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of adaptive variable length coding in which a set of data symbols comprising a certain first number of data symbols having a first value and a certain second number of data symbols having values other than the first value are represented by variable length codewords.SOLUTION: A video encoder 600 generates INTRA-coded and INTER-coded compressed video frames. A discrete cosine transform is performed in a transform block 104, and both coefficients thus produced are subsequently passed to a quantizer 106 and quantized there. A video multiplex coder 670 represents non-zero-valued coefficients as (run, level) pairs. The video multiplex coder 670 then applies variable length coding to the run and level values such that a single VLC codeword is assigned to each pair, and transmits the codeword to a decoder in a bit-stream 635.SELECTED DRAWING: Figure 6 |
