Bit rate estimation in data or video compression

摘要

To reduce the complexity of rate-distortion cost computation in AVC (MPEG4 Part2/H.264), a bit rate estimation method is used to avoid entropy coding during Intra and Inter mode decision. The bit rate estimation method predicts the number of entropy coded bits based on the quantized transform coefficients, thus avoiding the need to entropy code the quantized transform coefficients at each decision iteration.

主权项

1. A method of transmitting compressed data at a minimized bit rate over a network, the method comprising:
estimating a minimized bit rate required for compressing the data using an encoding scheme comprising
predicting bit rates of each of a plurality of symbols of the encoding scheme, without compressing the data to be compressed, based on characteristics of the data and codes of the encoding scheme, andcomputing a computed bit rate required for compressing the data by summing the bit rates predicted for each of the symbols; compressing the data using the computed bit rate to produce compressed data; and transmitting the compressed data to a network.