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	抗阻塞干扰的低速率语音编码传输算法
	张鑫 ; 崔慧娟 ; 唐昆 ; ZHANG Xin ; CUI Huijuan ; TANG Kun
	2010-06-09 ; 2010-06-09
关键词	语音信号处理 阻塞式干扰 滑动窗 低速率语音 speech signal processing rejective interference sliding window low-bit-rate speech coding TN912.3
其他题名	Low-bit-rate speech coding and transmission algorithm for defending the wideband rejective interference
中文摘要	为满足在跳频信道上的语音传输需求,研究了一种抗阻塞干扰的"滑动窗"语音传输算法。将传输码流均匀地分成若干片段,用定长的"滑动窗"在码流上滑动并截取其中的一段连续片段作为某跳频点的数据。接收端比较连续若干跳的重叠部分,判断并恢复出"坏跳"数据。对每个片段进行差错控制保护,通过"联合最大后验概率译码"的方法抵抗更高误码率的影响。测试表明:在有阻塞干扰的跳频信道上,"滑动窗"算法的分段信噪比平均高出传统的连续可变斜率增量调制算法20dB。; A sliding window algorithm was developed for speech communications on Frequency-Hopping (FH) channels with wideband rejective interference. The transmitted bit stream is divided into equal slices with a fixed length "sliding window". Several slices are transmitted as the data in one hop. The overlapped parts of the data of consecutive hops are compared to make a bad hop decision at the receiver. Each slice is error protected using Joint Maximum Posterior Probability decoding. Simulations show that the average segmental signal-to-noise ratio of the sliding window algorithm exceeds that of the continuously variable slope delta algorithm by more than 20 dB for the same channel conditions.; 国家自然科学基金资助项目(60272020)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/54436]
专题	清华大学
推荐引用方式 GB/T 7714	张鑫,崔慧娟,唐昆,等. 抗阻塞干扰的低速率语音编码传输算法[J],2010, 2010.
APA	张鑫,崔慧娟,唐昆,ZHANG Xin,CUI Huijuan,&TANG Kun.(2010).抗阻塞干扰的低速率语音编码传输算法..
MLA	张鑫,et al."抗阻塞干扰的低速率语音编码传输算法".(2010).

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