COMMUNICATION TERMINAL AND COMMUNICATION METHOD

摘要

A communication terminal and method are provided, wherein a processor executes instructions to configure a codec mode or a codec mode set for a communication terminal. The configuration is based on Session Description Protocol (SDP) offer/answer messages between the communication terminal and a partner terminal in a codec negotiation session when communication starts between the communication terminal and the partner terminal, when the SDP offer/answer messages include a codec, and when a codec mode or a codec mode set is included. The processor also configures a Real-time Transport Protocol (RTP) payload format header based on the SDP offer/answer messages in the codec negotiation session, a CMR being a request for the partner terminal to change the codec mode. The processor further causes the transmitter to transmit, after the codec negotiation session, a codec mode of the communication terminal currently in use, using an RTP payload.

主权项

1. A communication terminal, comprising:
a processor, and a transmitter, wherein the processor executes instructions to configure a codec mode or a codec mode set for the communication terminal, based on Session Description Protocol (SDP) offer/answer messages between the communication terminal and a partner terminal in a codec negotiation session when communication starts between the communication terminal and the partner terminal, when the SDP offer/answer messages include a codec, and when a codec mode or a codec mode set is included; configure a Real-time Transport Protocol (RTP) payload format header, whether the header includes a codec mode request (CMR) field or not, based on the SDP offer/answer messages in the codec negotiation session, a CMR being a request for the partner terminal to change the codec mode; and cause the transmitter to transmit, after the codec negotiation session, a codec mode of the communication terminal currently in use, using an RTP payload.