| CCITT G.721 ADPCM编解码器软件实现 |
| |
| 引用本文： | 张星,齐立心. CCITT G.721 ADPCM编解码器软件实现[J]. 北京交通大学学报(自然科学版), 1992, 0(Z1) |
| |
| 作者姓名： | 张星 齐立心 |
| |
| 作者单位： | 北方交通大学通信与控制工程系，北方交通大学通信与控制工程系 |
| |
| 摘 要： | 本文论述了 CCITT 1986年10月提出的32kb/s ADPCM 语音压缩编码 G.721建议的基本结构,自适应量化和自适应预测算法基本原理,并利用数字信号处理器 TMS 32010的各种运算技巧,尽量压缩指令执行时间,用计算机模拟标准算法作为调试手段,完成了 G.721标准的编码器和解码器全部功能,达到运算精度与 G.721完全一致,并全部通过了数据测试序列.
|
| 关 键 词： | 差分脉码调制 信源编码 信源译码 |
CCITT G.721 ADPCM Transcoder Software Realization |
| |
| Zhang Xing Qi Lixin. CCITT G.721 ADPCM Transcoder Software Realization[J]. JOURNAL OF BEIJING JIAOTONG UNIVERSITY, 1992, 0(Z1) |
| |
| Authors: | Zhang Xing Qi Lixin |
| |
| Affiliation: | Department of communication and Control |
| |
| Abstract: | This paper briefly discusses the standard algorithm configuration of the 32 kbit/s ADPCM speech compression encoding recommended by CCITT in 1986,together with the principles of adaptive quantization and prediction algori- thm.A DSP TMS32010 chip is used to realize the whole encoding and decoding processes.The software is designed to make the operation time as short as possible.The system has passed the data testing sequence,and the experiment by means of computer simulation shows that the operation accuracy is satisfied to CCITT G.721 standard. |
| |
| Keywords: | differential pulse modulation source coding source deccding |
| 本文献已被 CNKI 等数据库收录！ |
