文中提出应用数字信号处理器和微控制处理器ARM9核的MPEG-4视频简易框架和高级音频编码解码器的实时嵌入式设计。
A real-time embedded design of MPEG-4 visual simple profile and advanced audio coding decoder using Digital Signal Processor and ARM9 core are presented in this paper.
为了压缩数据，LZ 77算法使用对匹配数据的引用来取代数据部分。匹配数据已经通过编码器和解码器传递。
To compress data, the LZ77 algorithm replaces portions of the data with references to matching data that has already passed through both the encoder and the decoder.
只要预测到符号是独特的，就不需要对其进行编码，因为解码器从DTD生成相同的模型，从而可以生成独特的预期符号。
Whenever the predicted symbol is unique, there is no need to encode it as the decoder generates the same model from the DTD and thus can generate the unique expected symbol.
如果开始出现的是0 ，那么这个规则需要改变，但效果是一样的，因为编码器和解码器都遵循这一规则。
This rule can be inverted to store a 0 if the run begins with a 0 bit, but the effect is the same as long as both the encoder and the decoder of the inversion list agree on this detail.
本论文研究了MPEG - 4标准，在实现MPEG - 4视频编解码器软件原型的基础上，重点研究了编码过程中的两项关键技术：运动估计和码率控制。
This paper research the MPEG-4 standard and realize the software prototype of the MPEG-4 video codec. The paper emphasize two key techniques in MPEG-4 encoder: Motion Estimation and Bit Rate Control.
试验结果表明：该算法在获得与级联解码器-下采样-编码器几乎一致的视频质量情况下，大大地降低了计算复杂度。
Experimental results show that the complexity of our proposed algorithm is much less than that of the cascaded decode-encoder scheme, while the quality of video almost keeps the same.
三值光编码、解码器和三值逻辑运算器是三值光计算机关键部件，是实现三值光计算机其它部件的基础。
Ternary optical coder , decoder and ternary logical calculus belong to key components of ternary optical computer, and they are the base of implementing other components of the optical computer.
在尽量减少时钟消耗的前提下，此解码器可以解码每个变换块中变换系数的熵编码码流，并将结果按照块扫描顺序并行输出。
While minimizing the use of clock cycles, it could decode the coded stream of transform coefficients in each block and output the decoded coefficients in zigzag scanning order.
随后，本文在PC机上采用VC编写了改进后的MPEG - 4视频编码器和解码器的软件，验证了对算法改进的可行性。
Later this paper implements the software of modified video encoder and decoder of MPEG-4 using VC on PC platform, which verifies feasibility of modified algorithms.
因此如何准确估算出差错环境下从编码器到解码器端的失真度，并由此来决定编码模式就成为率失真优化的关键问题。
Therefore, how to estimate precisely the distortion between the codec in error prone environments in order to choose the coding mode is the key problem of rate-distortion.
设计选用PCI多媒体接口芯片SAA7146A，方便的实现了与视频编码器、视频解码器和音频编解码器的连接。
It USES the PCI interface chip SAA7146A special for media processing produced by Philips, and connects simply with video encoder, video decoder, audio encoder and decoder.
本课题的主要工作就是对人眼部分特性进行研究，并建立相应的模型，应用于视频编解码器中，指导编码器完成更加高效的编码。
The kernel work of this thesis is to research on vision characteristics, establish perceptual coding models, and use them to accomplish effective coding.
这些公共运动参数用于在不需要将相关的运动参数从编码器传输至解码器的情况下，生成默认时间预测。
These common motion parameters are used for generating a default temporal prediction without the need to transmit related motion vectors from the encoder to the decoder.
实验表明，视觉压缩模型的引入有效降低了编码端码率，而主观重构质量同标准解码器的输出一致。
Experiment results show, the two proposed visual models can help to reduce the encoder output bit rate efficiently while guaranteeing the quality of decoded video.
理论分析和实验结果表明，在编码效率和检错能力变化不大的情况下，本算法提高了编解码器运算速度，具有实际意义。
Theoretic analysis as well as experiments show that this coding and decoding algorithm may work well with a faster speed compared with previously proposed schemes, being applicable in practice.
例如，对于编码器或解码器异常回退，不使用回退缓冲区，因为这种回退将引发异常而不是产生输出。
For example, the fallback buffer for an encoder or decoder exception fallback is not used because the fallback throws an exception instead of producing output.
例如，对于编码器或解码器异常回退，从不使用回退缓冲区，因为这种回退将引发异常而不是产生输出。
For example, the fallback buffer for an encoder or decoder exception fallback is never used because the fallback throws an exception instead of producing output.
运动估计和补偿在MPEG - 4编码器和解码器中占用资源最多，人们直寻求较有竞争力的运动估计和补偿的算法。
Motion estimation and compensation costs the most resource in MPEG-4 encoder and decoder, and people are always seeking the emulative algorithm of motion estimation and compensation.
解码器实质上是编码器的逆向结构和方法，产生一个听觉上不能与原始信号区分开的被还原的音频信号。
The decoder is essentially an inverse of the structure and methods of the encoder, and results in a reproduced audio signal that cannot be audibly distinguished from the original signal.
FPGA实现MV B控制器功能，分为曼彻斯特编码器、解码器、缓冲区、中央控制单元、内部存储器和单片机接口等几部分。
The FPGA is designed as a MVB controller which consists of Manchester encoder, Manchester decoder, buffer, center control unit, internal memory, MCU interface and so on.
这个标准中只定义解码模型，因此编码端的复用器的设计有很大的自由度，只要能够被MPEG-2解码器所解码就符合要求。
The standard only defined the decoding model, then the multiplex designing was very free, because it was demonstrated good if the output of it could be decoded by the MPEG-2 decoder.
本文将语音增强的算法和低信噪比下的端点检测算法应用到CELP编解码器中，提出了EV - CELP编码模型。
In this paper, the speech enhancement algorithm and the new endpoint detection algorithm are applied to CELP encoder, and EV-CELP model is presented.
在声表面波传感器中，特殊叉指换能器构造了无源无线编码器和解码器，它能对众多传感器单元编码。
In the SAW sensor, special Inter-Digital transducer (IDT) on a piezoelectric substrate constructs passive SAW encoding and decoding element. The sensor elements are available to be embe...
在声表面波传感器中，特殊叉指换能器构造了无源无线编码器和解码器，它能对众多传感器单元编码。
In the SAW sensor, special Inter-Digital transducer (IDT) on a piezoelectric substrate constructs passive SAW encoding and decoding element. The sensor elements are available to be embe...
应用推荐