A certification path is an ordered list of certificates starting with a certificate issued by the relying party s trust root, and ending with the target certificate that needs to be validated. Certification path validation procedures are based on the algorithm supplied in ITU-t Recommendation X.509 and further defined in Internet Engineering Task Force (IETF) Request for Comments (RFC) 3280. Certification path processing verifies the binding between the subject distinguished name and/or subject alternative name and the subject public key defined in the target certificate. The binding is limited by constraints, which are specified in the certificates that comprise the path, and inputs that are specified by the relying party. To ensure secure interoperation of PKI-enabled applications, the path validation must be done in accordance with the X.509 and RFC 3280 specifications. This document provides the test assertions and the test cases for testing path validation software against these specifications.
標簽： certification certificates certificate starting
上傳時間： 2017-07-31
上傳用戶：清風冷雨
The 4.0 kbit/s speech codec described in this paper is based on a Frequency Domain Interpolative (FDI) coding technique, which belongs to the class of prototype waveform Interpolation (PWI) coding techniques. The codec also has an integrated voice activity detector (VAD) and a noise reduction capability. The input signal is subjected to LPC analysis and the prediction residual is separated into a slowly evolving waveform (SEW) and a rapidly evolving waveform (REW) components. The SEW magnitude component is quantized using a hierarchical predictive vector quantization approach. The REW magnitude is quantized using a gain and a sub-band based shape. SEW and REW phases are derived at the decoder using a phase model, based on a transmitted measure of voice periodicity. The spectral (LSP) parameters are quantized using a combination of scalar and vector quantizers. The 4.0 kbits/s coder has an algorithmic delay of 60 ms and an estimated floating point complexity of 21.5 MIPS. The performance of this coder has been evaluated using in-house MOS tests under various conditions such as background noise. channel errors, self-tandem. and DTX mode of operation, and has been shown to be statistically equivalent to ITU-t (3.729 8 kbps codec across all conditions tested.
標簽： frequency-domain interpolation performance Design kbit_s speech coder based and of
上傳時間： 2018-04-08
上傳用戶：kilohorse
HUAWEI MH5000-31 5G模塊AT命令手冊，用于開發(fā)華為MH5000-31模塊使用。本文根據(jù)終端設備的需求，實現(xiàn)了國際標準（如 3GPP 和 ITU-t）中的部分 AT 命 令。本文還描述了終端設備實現(xiàn)的私有 AT 命令接口，私有 AT 命令接口是為了更好 或更方便地實現(xiàn)某種功能。 本文不描述標準已經(jīng)定義或 MT 已實現(xiàn)，但華為終端產品需求涉及不到的接口。對于 AT 命令接口的描述，僅限于接口數(shù)據(jù)包本身，以及 TE 和 MT 對接口的使用方法和 使用流程，不包括與接口不直接相關的內容。本文也僅限于描述 TE 和 MT 之間 Rm 接口范圍內的 AT 命令接口，而不描述 MT 與 IWF 之間 Um 接口范圍內的 AT 命 令接口。 AT 命令是 TE 和 MT 之間的通信命令協(xié)議。如果有新款 MT 產品需要和現(xiàn)有 TE 對接，而現(xiàn)有 TE 是按照本 AT 規(guī)范實現(xiàn)的，則新款 MT 必須遵守此規(guī)范才能保證 兩者成功對接。比如新款模塊和現(xiàn)有 PC 統(tǒng)一后臺對接，那么新款模塊必須遵守此規(guī) 范；反之亦然，比如新開發(fā)某 PC 后臺或 PC 工具，也要遵守此規(guī)范，才能和現(xiàn)有的 終端產品對接。若 TE 和 MT 不用 AT 命令通信，則不受本規(guī)范限制。
上傳時間： 2022-03-22
上傳用戶：1208020161
ITU-t的H.323標準[1規(guī)定了如何在沒有QoS保證的分組網(wǎng)上實現(xiàn)多媒體通信的具體技術要求和規(guī)程，它為在IP網(wǎng)絡上進行聲音、視頻和數(shù)據(jù)通信建立了基礎。因為，目前IP網(wǎng)絡不能完全滿足會議系統(tǒng)所要求的多點對多點通信控制功能，需要有多點控制單元MCU處理多點視聽信號的分配、切換和管理。在Internet迅速發(fā)展和PC極為普及且性能較高的背景下，基于PC和IP網(wǎng)絡的桌面型視頻會議將有較好的應用前景。整個系統(tǒng)包括：終端、網(wǎng)關、網(wǎng)守和MCU，都是基于PC和Windows系統(tǒng)用VC+ +實現(xiàn)的。1 MCU的總體設計MCU支持同時舉行多個會議，會議的個數(shù)沒有限制，每個會議可以接入多個終端。MCU可接入終端的數(shù)量理論上只限制于Windows操作系統(tǒng)下可使用的SOCKET端口的數(shù)量，實際上主要的限制在于MCU接入的網(wǎng)絡帶寬和MCU主機的處理能力如CPU、內存等。
標簽： mcu
上傳時間： 2022-06-26
上傳用戶：wangshoupeng199
H.264ITU-t 標準源碼JM98 ITU推薦的免費解碼器
上傳時間： 2014-01-24
上傳用戶：lhc9102
ITU 的T.30標準文檔.T.30標準定義了三類傳真機的傳輸標準。
上傳時間： 2014-10-27
上傳用戶：linlin
ITU標準T.4-199303協(xié)議.rar
上傳時間： 2013-12-21
上傳用戶：zl5712176
ITU 標準T.4-200011協(xié)議.pdf
上傳時間： 2016-02-02
上傳用戶：waizhang
ITU-R BT.656數(shù)據(jù)協(xié)議
標簽： ITU-R 656 BT 數(shù)據(jù)協(xié)議
上傳時間： 2013-05-22
上傳用戶：eeworm
GB／T 4728.10-2008 電氣簡圖用圖形符號 第10部分：電信：傳輸.PDF
上傳時間： 2013-08-04
上傳用戶：eeworm
