A Hardware/Software Co-Design of High Efficiency AAC Audio Decoder
| Autor: | De-ming Chen, 陳德銘 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 This paper presents an implementation of hardware/software co-design for high efficiency advanced-audio-coding (HE-AAC) audio decoder. Based on our computation analysis, the decoder system is partitioned into software part and hardware part respectively. We allocate the lower complexity part and bitstream parser with the software solution, and the higher complexity part with the hardware solution. We design the hardware part as an intellectual property (IP) in VLSI design domain. As in this dedicated hardware, four units are developed to cope with the IMDCT, analysis quadrature mirror filterbank (AQMF), synthesis quadrature mirror filterbank (SQMF). For these versatile transformation functi ons, the common radix-2 FFT is decomposed to manipulate it. In an overall system, IP-based implementation is constructed including the wrapper design and some system-level implementation. This design is using TSMC 90 nm library with about 150K gates. Alternatively it can execute at a very low operation frequency with 1.75 MHz. Besides, the power consumption is only 7.69 mW. We further port our design on an ARM Integrator platform to make a real playable system. Over 91.26% ARM performance loading can be saved and substituted by this HE-AAC intelligent property (IP). |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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