| Paper: | AE-P3.10 | ||
| Session: | Broadband Coding, Perceptual Coding, and Auditory Modeling | ||
| Time: | Thursday, May 20, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Audio and Electroacoustics: Broadband and Perceptual Coding | ||
| Title: | TOWARDS OPTIMAL QUANTIZATION IN MULTISTAGE AUDIO CODING | ||
| Authors: | Renat Vafin; Royal Institute of Technology (KTH) | ||
| W. Bastiaan Kleijn; Royal Institute of Technology (KTH) | |||
| Abstract: | In this work, we develop a new method for quantization in multistage audio coding. We consider the case of a two-stage sinusoidal/waveform coder. Given a distortion measure and a bit-rate constraint, we analytically derive the optimal rate distribution between subcoders (stages) and the corresponding optimal quantizers, which allows the coder to easily adapt to changes in bit-rate requirements. We verify that the performance, both in terms of signal-to-noise ratio (SNR) and perceptual quality, is higher if the input to the second stage is obtained by subtracting the quantized first-stage reconstruction from the original signal, as opposed to subtracting the unquantized reconstruction. | ||
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