| 单词 | Table H-1: H.320 Related Standards Recommendations |
| 释义 | Table H-1: H.320 Related Standards Recommendations ITU-T Recommendation Description G.711 Pulse Code Modulation (PCM) voice coding at 64 kbps. G.722 Adaptive Differential Pulse Code Modulation (ADPCM) voice coding and compression of high-fidelity 7 kHz voice at 64/56/48 kbps. G.723 Dual-rate speech coder at 5.3 and 6.3 kbps for multimedia communications. G.728 Low-Delay Code Excited Linear Prediction (LD-CELP) coding and compression of 3.3 kHz voice at 16 kbps. G.729 Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-CELP) voice coding and compression at 8 kbps. H.221 Frame Structure for channel of 64–1920 kbps in audiovisual teleservices. H.223 Multiplexing protocol for low bit-rate multimedia communication. Annexes address mobile communications over low, moderate, and highly error-prone channels. H.225 Call signaling protocols and media stream packetization for packet-based multimedia systems. H.230 Frame synchronous control and indication signals for audiovisual systems. H.242 System for establishing communications between audiovisual terminals using digital channels up to 2 Mbps. Addresses call setup and teardown, in-band signaling and control, and channel management. H.245 Call control procedures for multimedia communications. H.261 Video codec for audiovisual services at px64 kbps. H.263 Video coding for low bit-rate communication at rates less than 64 kbps. T.120 Multipoint transport of multimedia data. |
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