Variable bit rate ( VBR) and constant bit rate ( CBR). 可变比特率(VBR)和恒定比特率(CBR)。
This bit rate can be approximately constant to support constant bit rate traffic or it can be highly variable to support variable bit-rate traffic. 比特率可以近似不变以支持恒定比特率业务或者高度变化以支持可变比特率业务。
For voice service which require constant bit rate, the power adaptation is used. While for data service, the rate adaptation is used, since data service can tolerate some delay. 对于要求恒定比特速率的话音业务,可以采用功率自适应,而对数据业务采用速率自适应,因为数据业务能够容忍一定的时延。
The small-signal gain is higher than 46 dB and the input dynamic range is about 40 dB with a constant single-ended output voltage swing of 400 mV. Satisfactory eye-diagrams are obtained at the bit rate of 12 Gbit/ s limited by the test set-up. 小信号增益大于46dB,输入信号比特率为12Gbit/s时,在输出电压幅度保持恒定(单端峰峰值400mV)的条件下,输入动态范围约为40dB。眼图性能良好。
As a conclusion, keeping the length of watermark bits and PSNR constant, the choice of orthogonal spreading code does not influence the bit error rate of watermark. 得出如下结论:在水印比特数、PSNR值不变的情况下,正交码码长的选择不影响水印检测误码率。
On the APON systems with global FIFO principle based media access control ( MAC) protocol, the cell delay property of constant bit rate cell stream is theoretically analyzed. The probability distribution of cell delay is obtained. 针对基于全局逻辑队列先进先出的介质访问控制(MAC)协议,分析了APON系统中一路为固定比特率的信元流的时延特性,得到了信元时延的概率分布结果。
This paper proposes a new rate control algorithm which can achieve a constant bit rate when coding asynchronous video objects. 针对异步视频对象编码,提出了一种速率控制算法,以达到恒定目标比特率。
Adaptive DCT coding of images at a constant bit rate 给定码率的DCT自适应图像编码
An analog video was compressed to digital stream with constant bit rate ( 4-8Mbit/ s) using MPEG-2 standard. The stream was transported to decompressed side to recovery the original picture by multiple E1 inverse multiplexing. 该方案中视频图像经过MPEG2标准压缩生成恒定速率(4~8Mbit/s)的数字码流,采用多E1反向复用技术将其传送到视频解码端还原。
It is possible to setup integrated streams defined perfectly and can be led to pipe with constant bandwidth, if DiffServ authenticates and classifies data streams of constant bit rate using the RSVP parameters or according to the types of special application. 如果DiffServ使用RSVP参数或根据专门应用类型对恒定比特率(CBR)数据流进行鉴别和分类,就可能建立完全定义的综合流,它能够被引导成为固定带宽的管道。
The coder has the desired embedded feature for progressive transmission and precise rate control for constant bit-rate traffic application. 263.同时,该编码器也具有渐近式传输所期望的嵌入特性,可以实现比特率精确控制,满足定速率传输视频应用的需要。
The proposed protocol is capable of supporting various types of the traffic, such as constant bit rate ( CBR), variable bit rate ( VBR), available bit rate ( ABR), unspecified bit rate ( UBR). 该协议支持不同类型信息传输,比如恒定比特率(CBR),可变比特率(VBR),可用比特率(ABR),未指定比特率(UBR)。
Bit-rate control is a key topic in the constant bit-rate video compression coding system. 码率控制是恒定码率视频压缩编码系统的一个关键研究课题。
This paper introduced an algorithm which can achieve a constant bit rate when encoding video with JPEG LS standard. 针对JPEG-LS算法的编码比特率特性提出了一套编码比特率控制算法,通过此算法可实现固定比特率的码流传送。
When the communication range is constant, usually the bit rate of the communication system can be raised by more than 40%. 通常,在通讯距离给定的情况下,通讯系统的比特率可提高40%以上。
The problems of CBR ( constant bit rate) traffic in ATM ( Asynchronous Transfer Mode) networks are analyzed, and simple methods to calculate the cell loss ratio ( CLR) and mean cell delay are derived. 分析了ATM网络中CBR业务排队性能,给出了一种简单的计算信元丢失率和信元平均时延的表达式。
The coding scheme of Constant Bit Rate ( CBR) which is used in most of cooperative transmission project misfits wireless systems, because of the statistics of wireless channel has its temporal spatial variability. 由于无线信道的统计特征随着时间和空间变化,现有的协作通信方案中大多采用的固定码率的编码方案并不适合无线系统。
The result shows that this algorithm is better than that of constant bit rate distribution on the performance of error rate in the addition of reducing the transmission power of system. 结果表明,该算法在误码率性能上明显优于等比特分配算法,也减少了系统的传输功率。