ENCODING AND DECODING SYSTEM, DECODING APPARATUS, ENCODING APPARATUS, ENCODING AND DECODING METHOD

摘要

An encoding and decoding system includes: a characteristic determining unit which determines whether a sound signal is a speech signal or an audio signal; an encoder which encodes the sound signal into an encoded signal, based on a determination by the characteristic determining unit; a transmitting unit which transmits the encoded signal; a receiving unit which receives the encoded signal; a decoder which decodes the encoded signal; and a packet loss detecting unit which detects a loss of data of the encoded signal and transmits a notification indicating the loss of the data to the characteristic determining unit. Upon receiving the notification indicating the loss of the data, the characteristic determining unit causes the encoder to encode the sound signal portion into a signal portion composed of independently decodable frames.

主权项

1. An encoding and decoding system which encodes a sound signal into an encoded signal and decodes the encoded signal, the encoding and decoding system comprising:
a characteristic determining unit configured to determine whether the sound signal is a speech signal or an audio signal, based on an audio characteristic of the sound signal; an encoder which encodes the sound signal by performing a speech signal encoding process when the sound signal is determined to be the speech signal by the characteristic determining unit, and encodes the sound signal by performing an audio signal encoding process when the sound signal is determined to be the audio signal by the characteristic determining unit; a transmitting unit configured to transmit the encoded signal; a receiving unit configured to receive the encoded signal transmitted by the transmitting unit; a decoder which decodes the encoded signal received by the receiving unit; and a packet loss detecting unit configured to detect a loss of data of the encoded signal in the reception of the encoded signal by the receiving unit, and transmit a notification indicating the loss of the data to the characteristic determining unit, wherein, when receiving the notification indicating the loss of the data, the characteristic determining unit is configured to cause the encoder to encode a portion of the sound signal to have a predetermined structure, and the portion encoded to have the predetermined structure in the encoded signal corresponds to one or more frames, and all of the frames are independently decodable by the decoder.