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.
标签： certification certificates certificate starting
上传时间： 2017-07-31
上传用户：清风冷雨
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.
标签： frequency-domain interpolation performance Design kbit_s speech coder based and of
上传时间： 2018-04-08
上传用户：kilohorse
HUAWEI MH5000-31 5G模块AT命令手册，用于开发华为MH5000-31模块使用。本文根据终端设备的需求，实现了国际标准（如 3GPP 和 ITU-T）中的部分 AT 命 令。本文还描述了终端设备实现的私有 AT 命令接口，私有 AT 命令接口是为了更好 或更方便地实现某种功能。 本文不描述标准已经定义或 MT 已实现，但华为终端产品需求涉及不到的接口。对于 AT 命令接口的描述，仅限于接口数据包本身，以及 TE 和 MT 对接口的使用方法和 使用流程，不包括与接口不直接相关的内容。本文也仅限于描述 TE 和 MT 之间 Rm 接口范围内的 AT 命令接口，而不描述 MT 与 IWF 之间 Um 接口范围内的 AT 命 令接口。 AT 命令是 TE 和 MT 之间的通信命令协议。如果有新款 MT 产品需要和现有 TE 对接，而现有 TE 是按照本 AT 规范实现的，则新款 MT 必须遵守此规范才能保证 两者成功对接。比如新款模块和现有 PC 统一后台对接，那么新款模块必须遵守此规 范；反之亦然，比如新开发某 PC 后台或 PC 工具，也要遵守此规范，才能和现有的 终端产品对接。若 TE 和 MT 不用 AT 命令通信，则不受本规范限制。
上传时间： 2022-03-22
上传用户：1208020161
ITU-T的H.323标准[1规定了如何在没有QoS保证的分组网上实现多媒体通信的具体技术要求和规程，它为在IP网络上进行声音、视频和数据通信建立了基础。因为，目前IP网络不能完全满足会议系统所要求的多点对多点通信控制功能，需要有多点控制单元MCU处理多点视听信号的分配、切换和管理。在Internet迅速发展和PC极为普及且性能较高的背景下，基于PC和IP网络的桌面型视频会议将有较好的应用前景。整个系统包括：终端、网关、网守和MCU，都是基于PC和Windows系统用VC+ +实现的。1 MCU的总体设计MCU支持同时举行多个会议，会议的个数没有限制，每个会议可以接入多个终端。MCU可接入终端的数量理论上只限制于Windows操作系统下可使用的SOCKET端口的数量，实际上主要的限制在于MCU接入的网络带宽和MCU主机的处理能力如CPU、内存等。
标签： mcu
上传时间： 2022-06-26
上传用户：wangshoupeng199
H.264ITU-T 标准源码JM98 ITU推荐的免费解码器
上传时间： 2014-01-24
上传用户：lhc9102
ITU 的T.30标准文档.T.30标准定义了三类传真机的传输标准。
上传时间： 2014-10-27
上传用户：linlin
ITU标准T.4-199303协议.rar
上传时间： 2013-12-21
上传用户：zl5712176
ITU 标准T.4-200011协议.pdf
上传时间： 2016-02-02
上传用户：waizhang
ITU-R BT.656数据协议
上传时间： 2013-05-22
上传用户：eeworm
GB／T 4728.10-2008 电气简图用图形符号 第10部分：电信：传输.PDF
上传时间： 2013-08-04
上传用户：eeworm
