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Free Lossless Audio Codec (FLAC) format is getting more and more popular through the Internet; however, up to now, it is hard to find a decoder chip supporting this kind of format in the market and most of the FLAC decoding systems in software are based on personal computer (PC). In this paper, an embedded FLAC decoder system was designed, and the embedded development platform of ARM920T was built...
A VLSI design of complex Quadrature Mirror Filterbank (QMF) for MPEG-4 High Efficiency Advanced Audio Coding (MPEG-4 HE-AAC) decoder using resource-sharing technique is proposed. The algorithm that uses conventional discrete cosine transform of type IV(DCT-IV) to optimize complex-QMF is derived in this paper. By using the proposed algorithm, the VLSI design of complex valued analysis quadrature mirror...
Increasing demand for high quality audio/video content put a great pressure on A/V codec complexity. On the other side, low-end devices demands low cost platforms. In this paper we present methodology for optimization of lossless audio decoders on a dual core DSP-s. In addition to the common techniques such as: instruction parallelization and buffer reusability, we describe generalized splitting algorithm...
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