Patent ID: 9288792
Filing Date: 2016-03-15
CPC Classification: H04M,H04W

Claim Text:
1. A communication terminal apparatus, comprising: a negotiator that negotiates a codec used for communication between the communication terminal apparatus and a counterpart terminal at a start of the communication, using an IP multimedia subsystem (IMS) signaling including one of a session description protocol (SDP) offer and an SDP answer, the negotiated codec being a codec that supports bandwidths of input signals of a plurality of codecs, and that changes a bandwidth of an input signal during the communication with the counterpart terminal by changing a frequency range of the input signal; and a bandwidth determiner that limits the bandwidth of the input signal of the codec during the communication with the counterpart terminal, according to signaling for limiting the bandwidth of the input signal of the codec, the signaling being notified from a network node.