Abstract
A single-chip decoder LSI is developed for ISO/IEC MPEG (the International Organisation for Standardisation/the International Electrotechnical Commission, Moving Pictures Expert Group) audio. The applicable layers are Layer I and II of MPEG-1 and MPEG-2/Lower-Sampling-Frequency Mode. A fast calculation algorithm, which is also effective for on-chip memory reduction, is incorporated in audio signal synthesis. The reliability in bitstream synchronization is improved by including bitstream inconsistency detection. Bitstream error concealment by repeating previous audio data is supported. The decoding delay is adjustable when an optional external memory is connected to the LSI.
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References
ISO/IEC 11172, “Coding of moving pictures and associated audio for digital storage media at about 1.5 Mb/s,” Aug. 1993.
ISO/IEC 13818, “Information technology-Generic coding of moving pictures and associated audio information-,” Nov. 1994.
M. Iwadare and T. Nishitani, “A fast subband analysis/synthesis algorithm for MPEG/audio,” 1992 IEICE Spring Nat'l Conv. Rec., Vol. A-194, pp. 1-194, March 1992.
M. Iwadare et al., “An MPEG/audio layer I/II CODEC,” 1992 IEICE Autumn Nat'l Conv. Rec., Vol. SA-9-2, pp. 2-294, March 1992.
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Iwadare, M., Takano, H., Shibuya, Y. et al. A Single-Chip MPEG/Audio Decoder LSI Based on a Compact Decoding Algorithm. The Journal of VLSI Signal Processing-Systems for Signal, Image, and Video Technology 16, 25–30 (1997). https://doi.org/10.1023/A:1007952032305
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DOI: https://doi.org/10.1023/A:1007952032305