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Unformatted text preview: IEEE TRANSACTIONS ON BROADCASTING, VOL. 51, NO. 4, DECEMBER 2005 439 Joint Encoding and Decoding Methods for Digital Audio Broadcasting of Multiple Programs Nivedita Naik, Deepen Sinha , Member, IEEE , Carl-Erik W. Sundberg , Fellow, IEEE , and James Tracey Abstract We introduce new methods for increasing the perfor- mance of multiprogram digital audio broadcast systems, e.g., satel- lite digital audio broadcasting. Joint multiprogram encoding is an attractive possibility for parallel broadcasting of a large number of programs. Joint coding extended over multiple audio frames in time give further improvements. The benefits of this kind of statis- tical multiplexing yield improved audio quality and/or higher ca- pacity in terms of number of programs. We describe the new Joint Multiple Program Encoding Technique in the context of the per- ceptual audio coding (PAC) type of algorithms. We also describe methods for multi-program transmission including Equal Error Protection (EEP) as well as Unequal Error Protection (UEP) and improved error concealment for multiple program transmission. Some of the techniques described in this paper, are currently being used in satellite digital audio broadcasting in the United States. Index Terms Digital audio, digital audio broadcasting, source coding, statistical multiplexing. I. INTRODUCTION D IGITAL audio encoding techniques such as Perceptual Audio Coder (PAC)  family of codecs have been proposed for use in a number of digital broadcasting applica- tions. Examples of such applications are terrestrial systems such as hybrid in band on channel (HIBOC) and all digital in band on channel (IBOC), whereby one stereo program is encoded and transmitted in either the AM or FM band, . Certain other existing systems involve the transmission of multiple pro- grams which are individually encoded; e.g., the terrestrial audio broadcasting standard for Europe, the so called EUREKA 147 system , , and satellite based audio broadcasting systems such as the Sirius and XM satellite broadcast systems. In these systems multiple stereo programs are transmitted. Systems of this type are potential applications of coordinated encoding and transmission of multiple programs. Broadcasting a large number of audio programs on one and the same carrier frequency, e.g., in a TDM (Time Division Mul- tiplexing) arrangement facilitates the introduction of a number of new ideas compared to single program broadcasting tech- niques. These ideas will be introduced and described in this paper. Manuscript received August 26, 2003; revised April 25, 2005.This paper was presented in part at the Audio Engineering Society (AES) Convention, Paris, France, February 1922, 2000....
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This note was uploaded on 01/31/2012 for the course EE 4002 taught by Professor Scalzo during the Fall '06 term at LSU.
- Fall '06