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A Design of TwinVQ Audio-Codec for Personal Communication Systems

机译:用于个人通信系统的TwinVQ音频编解码器的设计

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摘要

An improved design for a transform-domain weighted interleave vector quantization (TwinVQ) audio-codec is proposed that is applicable to personal communication systems. TwinVQ is a low-bit-rate audio-coding method that achieves high-quality under error-free conditions, at less than 64 kbit/s. To make this method applicable to wireless systems, which have a higher bit-error rate due to inferior transfer conditions, the TwinVQ coding algorithm has been improved. About 90% of TwinVQ encoded bits were found to be insensitive to channel errors, so using the BS-FEC method, error protection is weighted to the sensitive bits. Subjective evaluation tests showed that TwinVQ with BS-FEC maintains good quality over high bit-error-rate channels.
机译:提出了一种适用于个人通信系统的变换域加权交织矢量量化(TwinVQ)音频编解码器的改进设计。 TwinVQ是一种低比特率音频编码方法,可在无错误条件下以低于64 kbit / s的速度实现高质量。为了使该方法适用于由于传输条件较差而具有较高误码率的无线系统,对TwinVQ编码算法进行了改进。发现大约90%的TwinVQ编码位对通道错误不敏感,因此使用BS-FEC方法,将错误保护权重于敏感位。主观评估测试表明,带有BS-FEC的TwinVQ在高误码率信道上保持良好的质量。

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