A Fast Algorithm for Reference Consumed Bits Calculating for MPEG-4 AAC
Xiaojun Qiu · Audio Engineering · 2007
Rate-distortion control algorithm in MPEG-4 AAC(Advanced Audio Coding) needs to search Huffman code books many times to obtain the reference number of the current consumed bits. Based on the usage probability of different Huffman code books, a fast algorithm for reference consumed bits calculating is proposed from partial searching Huffman code books. Objective tests show that the proposed method can reduce the computational complexity effectively without significant degradation to the audio quality.