Encoder adaption in teleconferencing system

摘要

The invention relates to a method and an arrangement for encoding of signals in teleconferencing. The method involves receiving (502) signals from a plurality of nodes participating in a teleconference and analyzing (504) said signals. The method further involves appointing (506) one of the received signals as being a dominant signal and adapting (508) an encoder based on information related to the dominant signal. At least two of the received signals are mixed and then encoded (512), using the adapted encoder. The encoded mixed signal is then provided (514) to at least one of the nodes participating in the teleconference.

主权项

1. A method for encoding signals in teleconferencing, comprising:
receiving signals from a plurality of nodes participating in a teleconference; analyzing the received signals; appointing one of the received signals as a dominant signal; forming an adapted encoder by adapting an encoder based on information related to the dominant signal; forming a mixed signal by mixing at least two of the received signals, the at least two received signals including the dominant signal; forming an encoded mixed signal by encoding the mixed signal using the adapted encoder; and providing the encoded mixed signal to at least one of the nodes participating in the teleconference; wherein the adapting comprises adapting the encoder to base encoding on the dominant signal such that the dominant signal has a relatively higher weight in encoding than the other signals received from the plurality of nodes; wherein the information related to the dominant signal comprises either the dominant signal itself, upstream of any mixing with any of the other received signals, or coding parameters for the dominant signal, wherein the encoder is part of a scalable codec, the scalable codec comprising a primary codec providing primary encoding/decoding and a secondary codec providing secondary encoding/decoding, wherein the adapted encoder is a primary encoder in the primary codec; and using the secondary codec in the encoding of the mixed signal; and at least partially removing the dominant signal, or an approximation of the dominant signal, from the mixed signal before secondary encoding when the mixed signal comprises the dominant signal.