Back to Search
Start Over
Ultra-low delay lossy audio coding using DPCM and block companded quantization
- Source :
- AusCTW
- Publication Year :
- 2013
- Publisher :
- IEEE, 2013.
-
Abstract
- Real-time audio transmission requires good quality for a restricted channel capacity and minimum latency. An ultra-low delay audio coding scheme based on differential pulse code modulation (DPCM) and block companded quantization is presented. The prediction filter of the base backward DPCM codec is attained as a FIR filter in lattice structure. The proposed block based audio coding introduces an algorithmic latency below one millisecond and an overhead of less than a half bit per sample. The advantage of the block companded quantization with DPCM is the capability to follow rapid changes in the signal. Therefore, it significantly improves the perceptual audio quality compared to a plain DPCM coding scheme with an adaptive quantizer.
- Subjects :
- Computer science
Speech recognition
Quantization (signal processing)
Speech coding
Data_CODINGANDINFORMATIONTHEORY
computer.file_format
Sub-band coding
Channel capacity
Adaptive Multi-Rate audio codec
Computer Science::Sound
Computer Science::Multimedia
Codec
Sound quality
Pulse-code modulation
computer
Algorithm
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2013 Australian Communications Theory Workshop (AusCTW)
- Accession number :
- edsair.doi...........7ff3f2192abacf95183c49fd3a7ac1c2