This paper presents a simple differential speech signal codingalgorithm, based on backward adaptation. The considered algorithm is executed in frame by frame manner, by implementing predictive and adaptive quantizati...
详细信息
This paper presents a simple differential speech signal codingalgorithm, based on backward adaptation. The considered algorithm is executed in frame by frame manner, by implementing predictive and adaptive quantization techniques. Both prediction and adaptation are performed backward, based on the previously quantized input signal frame. This enables us to obtain high quality output signal, without increasing the bit rate. This research puts emphasis on the quantizer design, with the optimal support limit determination, and theoretical performance evaluation. Objective quality of the output signal is evaluated through signal to quantization noise ratio (SQNR). We perform theoretical and experimental analysis of the algorithm performance and provide comparative results of implementing speech signal coding techniques with similar complexity. Experimental results show that our simple differential speech coding algorithm satisfies the G. 712 Recommendation for high-quality speechcoding at the bit rate of 6 bits per sample. This indicates that the algorithm can be successfully implemented in high quality speech signal coding.
This paper presents a simple differential speech signal codingalgorithm, based on backward adaptation. The considered algorithm is executed in frame by frame manner, by implementing predictive and adaptive quantizati...
详细信息
This paper presents a simple differential speech signal codingalgorithm, based on backward adaptation. The considered algorithm is executed in frame by frame manner, by implementing predictive and adaptive quantization techniques. Both prediction and adaptation are performed backward, based on thepreviously quantized input signal frame. This enables us to obtain high quality output signal, without increasing the bit rate. This research puts emphasis on the quantizer design, with the optimal support limit determination, and theoretical performance evaluation. Objective quality of the output signal is evaluated through signal to quantization noise ratio (SQNR). We perform theoretical and experimental analysis of the algorithm performance and provide comparative results of implementing speech signal coding techniques with similar complexity. Experimental results show that our simple differential speech coding algorithm satisfies the G.712 Recommendation for high-quality speechcoding at the bit rate of 6 bits per sample. This indicates that the algorithm can be successfully implemented in high quality speech signal coding.
The function of a speech coding algorithm is to convert an analogue speech signal into a digital form for efficient transmission over a digital path, or efficient storage on a digital storage medium, and to perform th...
详细信息
The function of a speech coding algorithm is to convert an analogue speech signal into a digital form for efficient transmission over a digital path, or efficient storage on a digital storage medium, and to perform the complementary function of converting a received digital signal back to analogue form. The article reviews those speechcoding techniques which are already being extensively used in telecommunications applications. As well as explaining the basic principles employed by these speech coding algorithms to achieve efficient digital encoding, examples of telecommunications services which use these algorithms are presented.
暂无评论