摘要
栅格编码调制（ＴＣＭ）作为一种有效的数字调制技术，已经得到了广泛的应用。其在信源编码中的对偶———栅格编码量化（ＴＣＱ），也正在研究之中。ＴＣＱ方法利用有限字母表的率失真理论，采用信号的集合扩展、分划及支路标注等概念，结合信号本身的特点，得到了一种均方误差性能很好且计算量不复杂的压缩编码器。本文将ＴＣＱ量化编码方法用于语音编码，设计了ＴＣＱ编码模拟系统，模拟结果表明重建语音具有较高的主、客观质量。
rellis coded modulation (TCM) has been applied widely as a useful digtal modulation technique. Trellis coded quantization (TCQ)—the dual of TCM in source coding is also in study. On the basis of alphebet constrained rate distortion theory, we adopt the notions of signal set expansion, set partitioning and branch labeling of TCM to design TCQ coders of low complexity. Reconstructed speech from this system has a high subjective and objective quality.
关键词
栅格编码量化
语音编码
集合分划
speech coding, trellis coded quantization,set partitioning
