arith_test.m

压缩包中的内容用matlab语言对算术码进行描述

prob=[70, 30, 20]

OpenOutputBitFile('test.cmp');
initialize_arithmetic_encoder;

[output_bits] = encode_symbol(2, prob, 3)
[output_bits] = encode_symbol(1, prob, 3)
[output_bits] = encode_symbol(3, prob, 3)
[output_bits] = encode_symbol(1, prob, 3)
[output_bits] = encode_symbol(3, prob, 3)
[output_bits] = encode_symbol(1, prob, 3)
[output_bits] = encode_symbol(2, prob, 3)
[output_bits] = encode_symbol(1, prob, 3)
[output_bits] = encode_symbol(2, prob, 3)

[output_bits] = flush_arithmetic_encoder
CloseOutputBitFile;


OpenInputBitFile('test.cmp');
[input_bits] = initialize_arithmetic_decoder

[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)
[symbol, input_bits] = decode_symbol( prob, 3)

CloseInputBitFile;