In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 103, No. 5_Supplement ( 1998-05-01), p. 3027-3027
Abstract:
This paper describes an algorithm for multichannel audio signal compression using the psychoacoustic model, an implementation and the result on quality assessment of real-time operating multichannel audio codec, and a multiplexing technique of synchronization for AV communication. The algorithm which is based on the MPEG-2 audio standard, utilizes psychoacoustic modeling, sub-band analysis and synthesis, and bit allocation for information as key technology. The audio codec was implemented on real-time operation by using a flexible DSP system in which an encoder and a decoder are independently designed for processing a formatted digital audio bit stream, and can compress the multichannel audio data of about 3848 kbits/s into 384 kbits/s. A subjective test for quality assessment of multichannel audio codec was performed using double blind and triple stimuli with hidden reference method. In the test condition with 17 subjects and ten test materials, the test result with 95% confidence intervalshows that all test materials except one (pitch pipe sound) are awarded mean difference grades better than −0.6 and this audio codec is acceptable for AV communication or broadcasting. Finally, a multiplexing method to control time stamp for synchronization of AV communication is, in this paper, introduced from the implementation of HDTV system using this codec.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1998
detail.hit.zdb_id:
1461063-2
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