On Bit Rate Reduction of Inter-Channel Communication for a Binaural Hearing Assistance System

Yoshifumi CHISAKI  Ryouji KAWANO  Tsuyoshi USAGAWA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E91-A   No.8   pp.2041-2044
Publication Date: 2008/08/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e91-a.8.2041
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Signal Processing)
frequency domain binaural model,  hearing assistance system,  inter-channel communication,  

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A binaural hearing assistance system based on the frequency domain binaural model has been previously proposed. The system can enhance a signal coming from a specific direction. Since the system utilizes a binaural signal, an inter-channel communication between left and right subsystems is required. The bit rate reduction in inter-channel communication is essential for the detachment of the headset from the processing system. In this paper, the performance of a system which uses a differential pulse code modulation codec is examined and the relationship between the bit rate and sound quality is discussed.