在UNIX下用C编写的雷卡（RACAL）加密机与SCO-UNIX、TANDEM、HP9000三种平台的连接测试程序
标签： SCO-UNIX TANDEM RACAL UNIX
上传时间： 2013-12-25
上传用户：13681659100
在内存中的ADO记录集与DataBinding 建立ADO连接 ADO Update concurrency的测试 TANDEM Unstructured File 转入Access资料库 如何将其他资料汇入MDB档 如同XBase的Macro Evaluation (&) 数据库的锁定 XBase与VB用法对照 RDO之Informix与VB的连线 RDO 的建立结果集(一) RDO 的建立结果集(二) RDO 结果集之Isolation Level RDO 之Addnew/Update/Delete RDO Stored Procedure的呼叫 RDO rdoConnection物件的Events RDO之MultiResultset RDO之Blob资料的存取 RDO 放资料进入MSFlexGrid VB5在处理数据库时的几个“BUG” 用VB5访问具有用户级安全的Access97数据库 与数据库有关的问答集
标签： ADO Unstructured DataBinding concurrency
上传时间： 2016-09-23
上传用户：bruce
The 4.0 kbit/s speech codec described in this paper is based on a Frequency Domain Interpolative (FDI) coding technique, which belongs to the class of prototype waveform Interpolation (PWI) coding techniques. The codec also has an integrated voice activity detector (VAD) and a noise reduction capability. The input signal is subjected to LPC analysis and the prediction residual is separated into a slowly evolving waveform (SEW) and a rapidly evolving waveform (REW) components. The SEW magnitude component is quantized using a hierarchical predictive vector quantization approach. The REW magnitude is quantized using a gain and a sub-band based shape. SEW and REW phases are derived at the decoder using a phase model, based on a transmitted measure of voice periodicity. The spectral (LSP) parameters are quantized using a combination of scalar and vector quantizers. The 4.0 kbits/s coder has an algorithmic delay of 60 ms and an estimated floating point complexity of 21.5 MIPS. The performance of this coder has been evaluated using in-house MOS tests under various conditions such as background noise. channel errors, self-TANDEM. and DTX mode of operation, and has been shown to be statistically equivalent to ITU-T (3.729 8 kbps codec across all conditions tested.
标签： frequency-domain interpolation performance Design kbit_s speech coder based and of
上传时间： 2018-04-08
上传用户：kilohorse
