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New Directions in Subband Coding
Abstract
Two very different subband coders are described. The first is a modified dynamic bit-allocation-subband coder (D-SBC) designed for variable rate coding situations and easily adaptable to noisy channel environments. It can operate at rates as low as 12 kb/s and still give good quality speech. The second coder is a 16-kb/s waveform coder, based on a combination of subband coding and vector quantization (VQ-SBC). The key feature of this coder is its short coding delay, which makes it suitable for real-time communication networks. The speech quality of both coders has been enhanced by adaptive postfiltering. The coders have been implemented on a single AT&T DSP32 signal processo- text
- AT&T
- DSP32 Signal Processor
- Adaptive Postfiltering
- Coding Delay
- Digital Filters
- Encoding
- Filtering and Prediction Theory
- Modified Dynamic Bit-Allocation-Subband Coder
- Noise
- Noisy Channel Environments
- Real-Time Communication Networks
- Speech Analysis and Processing
- Speech Quality
- Subband Coding
- Vector Quantization
- Vocoders
- Voice Equipment
- Waveform Coder
- Electrical and Computer Engineering
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Last time updated on 17/10/2019
This paper was published in Missouri University of Science and Technology (Missouri S&T): Scholars' Mine.
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