coding decoding 中文意思是什麼
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The hardware of the ip phone codec to be designed is based on the fixed point digital signal processor ( ti ' s tms320vc5410 ) while the compression and decompression core in the software of dsp is based on the itu - t vg. 729a. ip phone codec carryout the task of collecting / playing - back. coding / decoding of speech signal and communication with embedded cpu. etc
該語音編解碼器的硬體基於tms320vc5410 ，編解碼演算法遵循itu - tg . 729a協議，能夠實現語音信號的採集/回放、編碼/解碼以及同嵌入式cpu通信等功能，在8kbit / s的碼率下能夠提供獲得良好的語音質量。 -
Firstly, chromatism analysis and wavelet transform are used for color image compression coding. in this method, one of the three color components of a color image ( for example the g component of a rgb color image ) is coded using wavelet transform, and the chromatism between g and other two color components rg = r - g, bg = b - g is coded respectively using chromatism analysis. during decoding, g ~ is first reconstructed using wavelet inverse transform and inverse quantisation, and rg, bg are reconstructed using chromatism analysis inverse transform ; then r, b are calculated by r = g + rg and b = g + bg respectively
其一是應用色差分析和小波變換對彩色圖象進行壓縮編碼，該方法是對彩色圖象的三個色彩分量之一，如rgb圖象的g進行小波變換編碼，而對g與另兩個色彩分量的差值（即rg = r - g和bg = b - g ）進行色差分析編碼，解碼則是通過反量化和小波逆變換得到g ^ ，通過色差分析的逆變換得到兩個重構的色差rg ^和bg ^ ，再算出r ^ = g ^ + rg ^ 、 b ^ = g ^ + bg ^ ，最後由r ^ 、 g ^ 、 b ^重構圖象。 -
Chapter 3 discusses the modules used in the fh - mpsk and fh - / 4dqpsk systems. these modules include : duc / ddc ( digital up converter / digital down converter ), nyquist flitter, burst start detection, interpolation module, pll ( phase locked loop ), pll error extraction, initial phase correction and the coding and decoding for tcm
第三章主要討論了跳頻模式下fh - mpsk和fh - 4dqpsk系統中各個模塊的設計，這些模塊包括：上下變頻器、奈奎斯特濾波器、信號到達檢測、插值模塊、通用環路、各環路誤差提取方法、初始相位校正和tcm編譯碼。 -
It is aimed, from the perspectives of both speaker and hearer, to analyze and discuss the four cognitive and pragmatic factors influencing the coding and decoding of bridging reference : accessibility, givenness hierarch, shared knowledge, and optimal relevance as well as their roles in the coding and decoding of the special reference
從話語交際雙方出發，分析影響確定性橋接參照構建與解讀的若干認知語用因素可及性、已知性、共識性和最佳關聯性，以及它們在橋接參照構建和指稱確認過程中各自的作用。 -
In order to enhance coding / decoding speed, we have rewritten image wavelet decomposition and composition program with c6701 assembly language in which we made use of parallel instructions and pipeline optimizing skill to lessen calculating time
為了提高編解碼速度，圖像小波分解與合成程序完全用c6701匯編指令編寫，其中大量使用并行指令和流水線優化，使運算時間大大減少。 -
Our object is an intermediate frequency modem of a software defined radio transmitter - receiver of multi - service, multi - modulationmode and multi - processdatarate. first, related software defined radio theory is introduced ; later, channels of transmitter - receiver are designed with consideration of data format, modulation, fec, interwaving. and scrambling ; emphasis is placed on theory and implementation of an audio compression algorithm cvsd ( continuous variable slope delta modulation ) and a fec technique convolutional coding - decoding
本文首先介紹了相關的軟體無線電理論；然後完成了包括數據格式，調制方式，糾錯碼方式，交織器和擾碼器等部分的中頻數據機通道設計；接著著重介紹了系統中使用的音頻壓縮演算法cvsd （連續可變斜率增量調制）的原理和實現，以及作為前向糾錯碼的卷積碼編碼理論和編解碼的高效實現。 -
It is accounted to the important signal technology in the ngn. sip is an application - layer control ( signaling ) protocol proposed by ietf for creating, modify and terminating session. the structure of the voip system and the relative technologies including audio coding / decoding and signal control technologies are discussed in this article
現有的ip電話信令控制協議h . 323協議由於自身的限制無法很好的滿足這種新要求，而sip協議以其所具有的結構簡潔、易於擴展和適于internet接入等良好的特性使它可以有效的控制媒體網關，控制pc呼叫，從而使其在ngn的控制協議中具有重要的地位。 -
Realization of pcm coding - decoding system with software
編解碼器的軟體實現 -
The goal of this thesis is to accomplish base - band channel coding / decoding, fh framing / de - framing and fh synchronization, and also to control the modulator and demodulator in the prototype system. all these functions are implemented with a tms320vc5409 dsp
作為項目的一個重要組成部分，本文採用dsptms320vc5409實現了基帶處理部分的通道編解碼、跳頻意義的組拆幀和跳頻同步、並對調制解調晶元讀寫寄存器進行了配置。 -
Research on the several generations of coding - decoding image without quality degradation
圖像多次無降質編解碼的研究 -
The communication core with a set of logic implemented the functions of coding, decoding, data buffering, message testing and command judging and performing
數據通訊內核及其外圍邏輯完成了曼徹斯特編/解碼、數據緩沖、消息格式檢驗以及命令的解析、判斷和執行等功能。 -
Embedded system is the popular research subjects of the computer, which is the platform of the vedio coding & decoding system
嵌入式系統是當前計算機技術的熱門研究領域，是視頻編解碼的承載平臺。 -
At last, aim at the vidio transmission problem in uncertainty network, a scheme of channel error correction coding / decoding based on mpeg - 2 vidio transmission and its fpga hardware realization are proposed
另外，針對視頻在不可靠網路中的傳輸問題，提出了一種基於mpeg - 2視頻傳輸中的通道糾錯編解碼方案並給出了具體的fpga硬體實現方法。 -
This paper have introduced a kind of the design principle of wireless manage control system, the system have solved the technical baffling problem on making coding, decoding and identity identification in wireless communication and have remedied the shortcomings of traditional wireless manage system by using micro controller ( at89c2051 ) and dtmf baffling
介紹了一種無線調度控制系統的設計原理，使用單片機（ at89c2051 ）和dtmf信令解決了無線通信中的信令編碼、解碼及身份識別等技術問題，彌補了傳統的無線調度系統的不足。 -
In the fourth part, some key technologies about fine granular scalable video coding, decoding and rate shaping are surveyed, including how to shape the stream to get a better psnr, and how to allocate the rate of base and enhancement layer. a comparison study on the rate shaping analytic model of normal layered coding and fgs coding is presented
另外，本文在對現有的fgs編解碼技術深入研究的基礎上，改進了精細分層編碼中的截取演算法，並討論了碼率分配演算法，通過實驗得到了碼率分配的重要結論，且提出和對比了一般分層編碼和精細分層編碼的碼流截取演算法解析模型。 -
The system realization mainly includes the realization of recording, playing, coding - decoding, compressing and rtp of the audio as well as video capturing, replaying, etc. those problems of audio - compressing technology, audio - delaying, audio - jitter, echoing and voice activity detection which influence the audio quality have also been discussed and dealt with
其中系統實現主要包括語音的錄制、播放、編解碼、壓縮、實時傳輸協議等的實現以及視頻採集、回放等。對影響語音質量的語音壓縮技術、語音時延、語音抖動性、回聲以及靜音等問題進行了探討和處理。 -
Not only has accfast technology developed taiwan s first system - on - a - chip mp3 coding decoding controller, in the second half of 2002 the company will be launching an asymmetric digital subscriber line adsl chipset which will break the monopoly which foreign companies currently hold on adsl chipset products
許副總在美國英代爾dec等公司的cpu設計部門工作18年以上，以其在dsp與cpu方面的設計專才回國發展，在其擁有的設計基礎上，充分應用該技術設計產品。 -
" numeral monitor and control system " is introduced on top of that. coding, storing and decoding processes of numeral information are introduced in emphases. which information comes into being after picture taken from camera has been gathered, estimated and coding decoding by gathering card
本文首先介紹數字視頻的軟體壓縮標準，然後詳細地介紹了mpeg - 4編解碼過程，緊接著對數字錄像監控系統進行介紹，重點介紹了監控系統中攝像頭錄入的視頻圖像經視頻採集卡採集、量化后形成的數字信息的編碼存儲以及解碼輸出的過程。 -
Firstly, this thesis reviews the evolution of image coding / decoding theory, summarizes the technology framework of several image / video coding / decoding standards, designs a contrasting research to these standards, interoperates the origin of the h. 264 ' s advantages, and investigates the principal structure and the key modules of h. 264, as establishing necessary theory basis for the practical application
首先，本文回顧了圖像編解碼理論的發展歷程，總結了多種靜態圖像和視頻的編解碼標準的技術框架，對各種標準進行了比較研究，然後分析了h . 264的優勢來源，接著研究了h . 264的主體結構和關鍵模塊，為實際應用奠定了必要的理論基礎。 -
Space - time block codes ( stbc ) based on orthogonal design has attracts enough attentions in its applications in mimo - ofdm systems for its full diversity exploiting and low coding / decoding complexity. these applications include not only system performance improvement, but also reduction of the peak to average power ratio in mimo - ofdm systems. under these backgrounds, this paper first studies space - time block codes under the single carrier, flat fading situation, discusses the encoding / decoding principle and its performance under different channels. then, the author focused on the performance of space - time codes under time selective and frequency selective channels, uncovered the fundamental cause of how maximum doppler shift and power delay profile influences the performance of space - time codes through deduction and simulation
在上述背景下，本文以單載波，平坦衰落通道下的空時分組碼為切入點，深入分析了其編譯碼原理和在不同通道情況下的性能;以此為基礎，後文展開了對空時分組碼在多載波，時間選擇性和頻率選擇性衰落通道下的性能研究，通過理論推導和充分的模擬，揭示了空時/頻分組碼在時頻選擇性衰落通道中的性能變化的根本原因;在以上對多載波系統中空時分組碼的研究的過程中，作者發現了空時分組碼在降低系統峰平比方面應用的可行性，提出了一種降低峰平比的新方法。
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