conversation compression system for encoding and decoding frames of a conversation signal to generate synthesized conversation

摘要

"conversation compression system, excitation processing module, and bit stream representing a frame of a conversation signal". A conversation compression system (10) capable of encoding a conversation signal (18) into a bit stream for subsequent decoding to generate synthesized conversation (20) is disclosed. The conversation compression system 10 optimizes the bandwidth consumed by the bit stream by balancing the desired average bit rate with the perceptual quality of the reconstructed conversation. conversation compression system (10) comprises a full speed codec (22), a half speed codec 24, a quarter speed codec (26) and an eighth speed codec (28) the codecs ( 22, 24-9 26 and 28) are selectively activated based on a speed selection. In addition, full-speed and half-speed codecs (22 and 24) are selectively activated based on a type rating. each codec (22, 24, 26 and 28) is selectively activated to encode and decode the talk signal (18) and different bit rates emphasizing different aspects of the talk signal (18) to enhance the overall quality of the synthesized talk (20). ).