数码率

低数码率视频压缩编码及全软件H.263视频通信系统研究

Low Bitrate Image Sequence Coding and Full Software H.263 Communication System

一种新的基于H.263图象压缩协议的数码率控制策略

A New Control Tactics of the Data Coding Rate Based on H-263

高清晰度数字电视（HDTV）对PAL彩色全电视信号采用4fsc抽样，其数码率425.6274Mbit/s。

In the high definition digital television ( HDTV ), PAL TV signal is sampled with 4 f sc . The code rate is 425.627 4 Mbit / s.

128kb／s电视电话系统中数码率缓存器的控制策略研究

The Studies of Buffer Control Strategy of 128 kb / s Videophone System

与PARCOR参数相比，要得到同等音质的语音，用LSP参数可减少25%左右的数码率。

It has been reported that LSP coding can maintain the same speech quality as the lattice filter synthesizer , with a 25 % bit rate reduction .

729是一种低数码率、高话音质量的语音压缩编码标准。

729 is a low bit rate and high-quality speech compression coding standard .

语音压缩的实质就是在保证语音质量的情况下，降低数字化语音的数码率，从而减少数字化语音信号所占用的带宽。

The essence of speech compression is to reduce the rate of digital voice in the case of assuring the quality of voice , therefore reducing the bandwidth occupied by speech signal .

在电话信号低数码率传输时，若使用数字式压伸增量调制器，由于脉冲调幅器控制电平和信号电平的非线性特性，调制器的动态范围受到一定限制。

The dynamic range of a digital companded delta codec for transmitting voice signals in a lower bit rate is confined within the limit of linearity between the control level of the pulse amplitude modulator and the signal level .

一个能实时工作的2400b/s数字化声码器已研制成功。该声码器具有较好的语言质量，适用于低数码率的语言通信。

A real time digital vocoder which has 2400 b / s data transmission rate , has been developed The speech quality of the vocoder is excellent , and it can be used in low bit rate speech communications .

抗电磁干扰，保密性强等等。传输同样速率与信息的装备，光通信的性价比最高，很适合卫星与卫星、卫星与航天飞机等空间站之间高数码率信息的传输。

Because of its high function-price ratio , under the condition of transmitting same information and same data rate , it is very fit for high data transmission ratio between satellite and satellite , satellite and space shuttle , and so on .

然而数字图像占用的存贮空间相当大，一路数字化的高清晰度电视信号，其数码率高达1.3Gb／s，显然要实时存贮或传送这样大的数据量，是非常困难和不经济的。

But a digital image need occupy considerable store units , for example , the numeral rate of a trenchant television signal amounts to 1.3Gb/s . It is apparently difficult and uneconomic to store in real time or transfer so much data capacity .

数字语音通信中，语音信号直接数字化所需的数码率太高，为了提高传输和存储的效率，充分利用信道容量，必须对数字语音信号进行压缩编码。

Directly digitizing of speech signals needs too much high bit rate in digital speech communication , thus compression and coding of the speech signals is essential in the process to increase the efficiency of transmission and storage , as well as the channel capacity .

OCDMA中的正交码和素数码的误码率分析

BER Analysis of OCDMA with OOC and Prime Codes

经过线性区分变换优化后的汉语数码识别模型，孤立汉语数码语音识别率可以达到9932%。

The recognition accuracy of isolated Mandarin digits is over 99.32 % after using optimal linear discriminative transformation .

另外，有些国家也同样正在进入数码时代，它们对数码设备的采用率甚至比美国还快。

Furthermore , some countries are now heading into the digital age with even faster adoption rates than the US .