CEPT T L 03-16 E-1988 Transmission in a 64 kBit s Channel on Audio Signal Other Than Using A-Law and U-Law《不是使用 A-Law和U-Law的音频信号上64千比特 秒信道中的传输》.pdf

1、W 2326434 OOObOLB Yi Page 1 TL03-16E Recommendation T/L 03-16 (Edinburgh 1988) TRANSMISSION IN A 64 KBIT/S CHANNEL ON AUDIO SIGNAL OTHER THAN USING A-LAW AND W-LAW Recommendation proposed by Working Group T/WG 12 “Transmission and Multiplexing” (TM) Text of the Recommendation adopted by the “Telecom

2、munications” Commission: “The European Conference of Posts and Telecommunications Administrations, considering - that some applications can require the need of transporting two 32 kbit/s voice channel in a 64 kbit/s channel, - that some applications require the need of transporting medium quality au

3、dio signal (7 kHz) in a 64 kbit/s channel, - that the installation and operation of equipments from different origins require that they should be standardized, recommends that member Administrations adhere to the specications contained in this Recommendation.” Recommendation T/L 03-16 corresponds to

4、 the following CCITT Recommendations: - Recommendation G.721: “32 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM)” with the following modifications: - all references to the p-law will be suppressed, - within the algorithms “EXPAND”, “COMPRESS” and “SYNC”, input parameter called LAW will b

5、e suppressed. The operations corresponding in the CCITT Recommendation to the case LAW = 1 will be executed, the operations corresponding to LAW = O will be suppressed. - Recommendation G.722: “7 kHz audio coding within 64 kbit/s”, - Recommendation G.761: “General characteristics of a 60 channel transcoder equipment”. Edition of January 30, 1989 P