Title :
Joint optimization of scale factors and Huffman code books for MPEG-4 AAC
Author :
Bauer, Claus ; Vinton, Mark
Author_Institution :
Dolby Laboratories, San Francisco, CA, USA
fDate :
29 Sept.-1 Oct. 2004
Abstract :
The MPEG-4 AAC audio encoder achieves low bit rates by appropriately choosing the two encoding parameters Huffman code books and scale factors. Existing AAC implementations solve the implied optimization problem using an heuristic two loop search. This paper presents two novel optimization techniques that for the first time find optimal solutions for the AAC optimization problem.
Keywords :
Huffman codes; audio coding; dynamic programming; Huffman code book; MPEG-4 AAC; audio coding; dynamic programming; optimization technique; scale factor; two loop search; Bit rate; Books; Costs; Decoding; Dynamic programming; Encoding; Lagrangian functions; MPEG 4 Standard; Mathematical model; Signal to noise ratio;
Conference_Titel :
Multimedia Signal Processing, 2004 IEEE 6th Workshop on
Print_ISBN :
0-7803-8578-0
DOI :
10.1109/MMSP.2004.1436432
