Audio Coding: Theory and Applications
Audio Coding: Theory and Applications provides succinct coverage of audio coding technologies that are widely used in modern audio coding standards. Delivered from the perspective of an engineer, this book articulates how signal processing is used in the context of audio coding. It presents a detailed treatment of contemporary audio coding technologies and then uses the DRA audio coding standard as a practical example to illustrate how numerous technologies are integrated into a fully-fledged audio coding algorithm. Drawing upon years of practical experience and using numerous examples and illustrations Dr. Yuli You, gives a description of practical audio coding technologies including: • Designing high-performance algorithms that can be readily implemented on fixed-point or integer microprocessors. • How to properly implement an audio decoder on various microprocessors. Transient detection and adaptation of time-frequency resolution of subband filters. • Psychoacoustic models and optimal bit allocation. Audio Coding: Theory and Applications will be a valuable reference book for engineers in the consumer electronics industry, as well as students and researchers in electrical engineering.
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application scope audio coding algorithm audio signal auditory filters average codeword length basilar membrane bit rate bit stream coder coding gain companding compression critical band Critical Upper Edge decimated decision boundaries DPCM Edge Upper Edge encoder energy compaction equation filter bank frame header Huffman code Huffman codebook human ear Hz sample rate implementation input integer joint intensity coding log2 long MDCT long window M1X kD0 masked threshold masker matrix MDCT coefficients modulated MSQE number of bits perceptual irrelevance polyphase components pre-echo prefix-free code prototype filter quantization error quantization indexes quantization noise quantization step quantization unit quantized values rate Critical Upper represent sample rate sample values Sect short window shown in Fig sound source signal Springer Science+Business Media subband filters subband samples sum/difference coding symbol set Table transform coefficients transient segment unary code uniform quantizer Unpack Upper Edge Bands Upper Edge Upper vector window function window sequencing zero