幀誤碼率 的英文怎麼說
中文拼音 [zhèngwùmǎlǜ]
幀誤碼率
英文
bit error rate ber-
According to the information that reflected the condition of channel, this thesis classified acm into heuristic acm and snr - estimation acm. the system that using the first one of acm decide the scheme of modulation and coding according to the frame error ratio that reflected indirectly the condition of channel, while it using the another of acm decide the scheme according to the snr estimation
根據反映通道狀態的信息不同,本文將自適應編碼調制技術分為基於探索的自適應編碼調制技術和基於通道信噪比預測的自適應編碼調制技術,前者根據間接反映通道條件的誤幀率和重傳次數信息來決定編碼調制方式,而後者根據通道信噪比預測的結果調節編碼調制方案。Taking frame error rate as an evaluation standard of communication performance, the dynamic coding protocol was designed which assures the reliability of communication
把誤幀率作為通信性能的評價標準,設計了動態編碼協議,保證了系統通信的可靠性。The analysis of physical layer performance is mainly about harq and amc. first discuss the implemention of physical layer. then in front to simulation results, we can find their advantages in cell throughput and ber or fer
本文的物理層性能分析圍繞harq和amc技術展開,在分析物理層實現方案后給出模擬結果,分析harq和amc技術分別對系統吞吐量的貢獻,以及對誤碼率和誤幀率的優化,發現他們的優勢。Motion compensated prediction error image has significant amplitudes mainly along the boundaries of moving objects, correspondingly its wavelet coefficients contain large energy in high frequency bands. this greatly reduces the coding efficiency of ezw. it is first provided that the correspondence between the significant amplitudes area of the mcp error image and the wavelet coefficient significant map, then encode the significant map efficiently using quadtree approach, followed by bit - plane coding the significant coefficients to produce an embedded data stream. experiment result shows that compared to ezw and zte, the proposed algorithm is more efficient and has better performance
演算法對于運動補償余量誤差幀首先進行小波變換,並選取適當的閾值,用重要圖表示大於該閾值的重要系數。根據殘差幀小波系數的統計特性,用四叉樹方法編碼重要圖,並對重要系數作位面編碼,生成嵌入式碼流。實驗表明,與ezw , zte等演算法相比較,該演算法編碼效率高,復現圖像質量好。The standard is designed to give a new technical solution for a broad range of applications, such as very low bit rate conversational services and entertainment quality broadcast, interactive video - on - demand services etc. for the enhancement of the coding efficiencies, the new standard adopts new tools as following : multiple reference pictures, variable block - size with seven block sizes in motion prediction, quarter - pixel accuracy for motion vector, short word - length integer transform, context - adaptive entropy coding and loop filter deblocking
H . 264 / avc標準支持從低帶寬、高誤碼率的無線移動視頻通信到高帶寬、低誤碼率的有線視頻廣播等多種應用,因此,日益受到業界的關注。為了實現更高的編碼效率, h . 264 / avc標準採用了很多新的編碼技術,如多參考幀預測、多尺寸編碼塊模式、 1 / 4像素精度運動矢量、整數變換量化、基於內容的熵編碼、新型幀內預測、去除方塊效應的濾波器等。Considering the stability and continuity of face region, and the error propagation effect due to the high error rate in wireless channels, the intra - refresh method is used. the redundant data is not too much owing to the continuity, and the error propagation effect can be stopped accordingly
由於視頻中出現的人臉具有穩定性,連續性等特點,同時考慮到無線移動通道由於誤碼率高而引起差錯傳播問題,所以採用幀內編碼宏塊刷新的方法。Abstract : some problems about overall design of a small unmanned air vehicle telemetry system are presented in this paper. the construction and fundamental principle of the telemetry system is simply introduced. according to the telemetry task requirement, the key problems which should be solved at first are demonstrated mainly by system " s capacity design and channel design. the needed data transmission rate is carefully calculated with the telemetry parameter table provided by user and on this basis the frame structure is decided. the bit error rate in factual telemetry channel is grossly estimated in theory and a channel encoding scheme is provided to improve data transmission quality to meet with the requirement for extremely low bit error rate
文摘:論述了某型號無人機遙測系統中的容量和通道設計問題.文中對該遙測系統的組成和原理進行了介紹.結合具體的遙測任務需求,在容量設計中確定了數據傳輸率和使用的幀格式,在通道設計中,通過計算實際通道中的誤碼率,提出了相應的通道編碼方案以確保數據傳輸的低誤碼率要求分享友人