M73 视频、脉冲系统设备 标准查询与下载

SJ/T 10203-1991 CCD彩色单板应用电视摄像机测量方法（报批稿）

本标准规定了CCD彩色单板应用电视摄像机电性能参数的测量方法。 本标准适用于符合GB 12647《通用型应用电视制式》规定的CCD彩色单板应用电视摄像机。

Measuring methods for CCD single-chip colour non-broadcast TV cameras

ITU-T G.726 SPANISH-1990 40,32,24,16 kbit/s的自适应差分脉冲编码调制(ADPCM)(15号研究组)60pp

The characteristics below are recommended for the conversion of a 64 kbit/s A-law or p-law pulse code modulation (PCM) channel to and from a 40, 32, 24 or 16 kbit/s channel. The conversion is applied to the PCM bit stream using an ADPCM transcoding technique. The relationship between the voice frequency signals and the PCM encoding/decoding laws is fully specified in Recommendation G.711.

403224 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) (Study Group XV) 60 pp

ITU-T G.727 SPANISH-1990 5,4,3和2 Bits的自适应差分脉冲编码调制(ADPCM)的嵌入式样本(15号研究组)58pp

This Recommendation contains the specification of an embedded Adaptive Differential Pulse Code Modulation (ADPCM) algorithms with 5-, 4-, 3- and 2-bits per sample (Le., at rates of 40, 32, 24 and 16 kbit/s). The characteristics below are recommended for the conversion of 64 kbit/s. A-law or p-law PCM channels to/ from variable rate-embedded ADPCM channels.

5- 4- 3- and 2-Bits Sample Embedded Adaptive Differential Pulse Code Modulation (ADPCM) (Study Group XV) 58 pp

ITU-T G.727 FRENCH-1990 5-,4-,3-和2-Bits抽样嵌入式自适应差分脉冲编码调制(ADPCM).15号研究组;58pp

This Recommendation contains the specification of an embedded Adaptive Differential Pulse Code Modulation (ADPCM) algorithms with 5-, 4-, 3- and 2-bits per sample (Le.,at rates of 40, 32, 24 and 16 kbit/s). The characteristics below are recommended for the conversion of 64 kbit/s. A-law or p-law PCM channels to/ from variable rate-embedded ADPCM channels. The Recommendation defines the transcoding law when the source signal is a pulse-code modulation signal at a pulse rate of 64 kbit/s developed from voice frequency analog signals as fully specified by Blue Book Volume, Recommendation G.711. Applications where the encoder is aware and the decoder is not aware of the way in which the ADPCM codeword bits have been altered, or when both the encoder and decoder are aware of the ways the codewords are altered, or where neither the encoder nor the decoder are aware of the ways in which the bits have been altered can benefit from other embedded ADPCM algorithms.

5-, 4-, 3- and 2-Bits Sample Embedded Adaptive Differential Pulse Code Modulation (ADPCM)

ITU-T G.726 FRENCH-1990 40,32,24,16 kbit/s的自适应差分脉冲编码调制(ADPCM)(15号研究组)60pp

The characteristics below are recommended for the conversion of a 64 kbit/s A-law or p-law pulse code modulation (PCM) channel to and from a 40, 32, 24 or 16 kbit/s channel. The conversion is applied to the PCM bit stream using an ADPCM transcoding technique. The relationship between the voice frequency signals and the PCM encoding/decoding laws is fully specified in Recommendation G.711.

403224 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) (Study Group XV) 60 pp

ITU-T Q.106-1989 脉冲终了信号

On all automatic calls the discriminating digit must be sent over the international circuit or signalling channel by the country of origin of the call, and this country has to arrange for the automatic insertion of the discriminating digit (or information

Sending-Finished Signal - General Recommendations on Telephone Switching and Signalling - Functions and Information Flows for Services in the ISDN - Supplements (Study Group XI) 1 pp

ITU-T Q.20-1989 信令脉冲的绝对功率电平(相对于1mW的功率)最大允许值

The CCITT recommends that, for crosstalk reasons, the absolute power level of each component of a short The values given in this table result from a compromise between the characteristics of various existing duration signal should not exceed the values gi

Maximum Permissible Value for the Absolute Power Level of a Signalling Pulse - General Recommendations on Telephone Switching and Signalling - Functions and Information Flows for Services in the ISDN - Supplements (Study Group XI) 2 pp

ITU-T P.53-1989 噪声电压测量仪

Psophometers (Apparatus for the Objective Measurement of Circuit Noise) - Telephone Transmission Quality (Study Group XII) 1 pp

Psophometers (Apparatus for the Objective Measurement of Circuit Noise) - Telephone Transmission Quality (Study Group XII) 1 pp

ITU-T Q.321-1989 脉冲结束条件

The ST condition is determined by the receipt of the end-of-pulsing signal initiated by the operator.

End-of-Pulsing Conditions - Register Arrangements Concerning ST Signal - Specifications of Signalling Systems R1 and R2 (Study Group XI) 1 pp

ITU-T Q.479-1989 信号程序-回声抑制器

Recommendations 4.42 and Q.115 give fundamental requirements with which the employment of echo There are two methods of connecting echo suppressors to a circuit. One method is by use of permanently suppressors must comply.

Signalling Procedures - Echo-Suppressor Control - Signalling Requirements - Specifications of Signalling Systems R1 and R2 (Study Group XI) 4 pp

ITU-T Q.473-1989 信号程序-信号脉冲结束

Signalling Procedures - Use of End-of-Pulsing Signal I-15 in International Working - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp

Signalling Procedures - Use of End-of-Pulsing Signal I-15 in International Working - Specifications of Signalling Systems R1 and R2 (Study Group XI) 2 pp

ITU-T O.72-1989 特色的一个脉冲噪声测量仪宽带数据传输-规格为测量设备(第4研究组)1页

With the instrument calibrated in accordance with 0 3.6 in the flat condition and the operate level set to O dBm, rectangular pulses of either polarity of 50 milliseconds duration having a peak amplitude of 1.21 V with an interval between pulses in excess

Characteristics of an Impulsive Noise Measuring Instrument for Wideband Data Transmissions - Specifications for Measuring Equipment (Study Group IV) 1 pp

ITU-T Z.322 SPANISH-1988 视觉显示终端的性能

This Recommendation describes some of the capabilities which are important to the user and which are commonly available on interfaces based on VDTs. It is not an exhaustive list of capabilities. The use of additional capabilities, not covered in these Recommendations, is not precluded. Not all of the capabilities described need be present on a given system. Graphics capabilities are for future study and are therefore not considered in detail in these Recommendations.

CAPABILITIES OF VISUAL DISPLAY TERMINALS

ITU-T P.55 FRENCH-1988 测量脉冲噪声的仪表

Experiments have shown that clicks or other impulsive noises which occur in telephone calls come from a number of sources, such as faulty construction of the switching equipment, defective earthing at exchanges and electromagnetic couplings in exchanges or on the line.

APPARATUS FOR THE MEASUREMENT OF IMPULSIVE NOISE

ITU-T P.54-1988 声级计(客观测量室内噪声的仪表)

Sound Level Meters (Apparatus for the Objective Measurement of Room Noise) - Telephone Transmission Quality (Study Group XII) 1 pp

SOUND LEVEL METERS (APPARATUS FOR THE OBJECTIVE MEASUREMENT OF ROOM NOISE)

ITU-T P.55-1988 测量脉冲噪声的仪表

The CCITT considers it important that there should be a standardized method of objectively measuring speech level, so that measurements made by different Administrations may be directly comparable. Requirements of such a meter are that it should measure a

APPARATUS FOR THE MEASUREMENT OF IMPULSIVE NOISE

ITU-T I.232.1-1988 分组方式承载业务类别:虚呼叫和永久性虚电路(PVC)承载业务类别

This bearer service category provides the unrestricted transfer (without alteration) of user information in a packetized manner over a virtual circuit within a B- or D-channel at the S/T reference point. Signalling information forvirtual call and/or possibly OAM information for permanent virtual circuit services are transferred via B- or D-channelsas described in Recommendation I.462 (X.31).

PACKET-MODE BEARER SERVICE CATEGORIES – VIRTUAL CALL AND PERMANENT VIRTUAL CIRCUIT BEARER SERVICE CATEGORY

ITU-T Q.106 FRENCH-1988 脉冲终了信号

In semi-automatic working, when the international outgoing operator has finished keying or dialling, she operates a special button on her keyboard or a key so that, after the number, a local signal which is called a sendingfinished signal is sent to the outgoing equipment to show that there are no more digits to follow. In automatic working, subscribers cannot show when they have finished dialling the number, and so this signal does not apply.

The sending - finished signal

ITU-T O.71-1988 脉冲噪声测量设备,电话型电路-规格为测量设备的第4研究组.共4页.同时,作为Recmn H .13

The instrument will record the number of times that the instantaneous voltage of the input signal exceeds a predetermined threshold during the period of measurement. The maximum rate at which the instrument can record impulses exceeding the threshold is 8

IMPULSIVE NOISE MEASURING EQUIPMENT FOR TELEPHONE-TYPE CIRCUITS

ITU-T Q.106 SPANISH-1988 脉冲终了信号

In semi-automatic working, when the international outgoing operator has finished keying or dialling, she operates a special button on her keyboard or a key so that, after the number, a local signal which is called a sendingfinished signal is sent to the outgoing equipment to show that there are no more digits to follow. In automatic working, subscribers cannot show when they have finished dialling the number, and so this signal does not apply.

The sending - finished signal