Low-Cost Low-Power ASIC Solution for Both DAB+ and DAB Audio Decoding

DAB+ is the upgraded version of digital audio broadcasting (DAB). DAB and DAB+ coexist in many countries, so receivers are required to be compatible with both standards. In this paper, a solution integrating an MPEG1-LayerII (MP2) decoder and an advanced audio coding (AAC) low-complexity (AAC LC) decoder is proposed to provide basic audio decoding for both DAB and DAB+. It also utilizes simple methods to improve high frequencies and stereo quality instead of complicated spectrum band replication and parametric stereo. A highly integrated low-power audio decoder design compatible with DAB/DAB+ and using a purely ASIC approach is presented. As a result of the system structure optimization and hardware sharing, the audio decoder is fabricated in 1P4M 0.18- μm CMOS technology using only 3.2 mm2 silicon area (including 147 456 bits RAM and 170 496 bits ROM). The power consumption of the audio decoder is 10.4 mW for DAB audio decoding and 8.5 mW for DAB+ audio decoding. Laboratory and field tests show that the function is correct and the audio quality is good for receiving both DAB and DAB+. The audio decoder is thus proven to be a low-cost low-power solution for the two existing DAB standards.

[1]  Guoyu Wang,et al.  An ASIC implementation of MPEG audio decoders , 2007, 2007 7th International Conference on ASIC.

[2]  Tsung-Han Tsai,et al.  Low-Power System Design for MPEG-2/4 AAC Audio Decoder Using Pure ASIC Approach , 2009, IEEE Trans. Circuits Syst. I Regul. Pap..

[3]  Dajiang Zhou,et al.  An SoC based HW/SW co-design architecture for multi-standard audio decoding , 2007, 2007 IEEE Asian Solid-State Circuits Conference.

[4]  Tae-Gyu Chang,et al.  An efficient method of Huffman decoding for MPEG-2 AAC and its performance analysis , 2005, IEEE Transactions on Speech and Audio Processing.

[5]  Jürgen Herre,et al.  Temporal Noise Shaping, Qualtization and Coding Methods in Perceptual Audio Coding: A Tutorial Introduction , 1999 .

[6]  Jürgen Herre,et al.  MPEG-4 High-Efficiency AAC Coding , 2007 .

[7]  Peilin Liu,et al.  VLSI Implementation for Portable Application Oriented MPEG-4 Audio Codec , 2007, 2007 IEEE International Symposium on Circuits and Systems.

[8]  Chen Ke-ming.  Software optimization of MPEG-4 audio decoding based on RISC processor , 2007 .

[9]  M.C. Hans,et al.  A compliant MPEG-1 layer II audio decoder with 16-b arithmetic operations , 1997, IEEE Signal Processing Letters.

[10]  Hyuckjae Lee,et al.  A 159.2mW SoC implementation of T-DMB receiver including stacked memories , 2008, 2008 IEEE Custom Integrated Circuits Conference.

[11]  Renato Coral Sampaio,et al.  Hardware and software co-design for the AAC audio decoder , 2012, 2012 25th Symposium on Integrated Circuits and Systems Design (SBCCI).

[12]  Ming Yan,et al.  Design and Implementation of MPEG-4 AAC Decoder on ARM Embedded System for CMMB Receiver , 2009, 2009 International Conference on Management and Service Science.

[13]  Daniel Schulz.  Improving audio codecs by noise substitution , 1996 .

[14]  M. Dietz,et al.  MPEG-4 high-efficiency AAC coding [Standards in a Nutshell] , 2008 .

[15]  Seong-do Kim,et al.  A CMOS single chip receiver with RF front-end and baseband processor for Band-III T-DMB/DAB applications , 2009, 2009 11th International Conference on Advanced Communication Technology.

[16]  Mingying Lu,et al.  Optimization and Hardware Implementation of the AAC Inverse Quantization Algorithm for Portable DAB plus Receivers , 2012 .

[17]  Tsung-Han Tsai,et al.  A 1.4 MHz 0.21 mW MPEG-2/4 AAC single chip decoder , 2009, 2009 IEEE Custom Integrated Circuits Conference.

[18]  A. Renner,et al.  An MPEG-4 AAC decoder FPGA implementation for the Brazilian digital television , 2012, 2012 VIII Southern Conference on Programmable Logic.

[19]  Albert Tseng,et al.  A low-cost and low-power single-chip DAB+/DAB/FM receiver , 2010, 2010 Proceedings of ESSCIRC.

[20]  Chih-Ying Lin,et al.  FFT and IMDCT circuit sharing in DAB receiver , 2003, IEEE Trans. Broadcast..

[21]  Chang Won Ryu,et al.  Design of Digital Audio DSP Core , 2006, 2006 International Forum on Strategic Technology.

[22]  Mu-Huo Cheng,et al.  Fast IMDCT and MDCT algorithms - a matrix approach , 2003, IEEE Trans. Signal Process..

[23]  Chen Kong Teh,et al.  A 9.7mW AAC-Decoding, 620mW H.264 720p 60fps Decoding, 8-Core Media Processor with Embedded Forward-Body-Biasing and Power-Gating Circuit in 65nm CMOS Technology , 2008, 2008 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.