公开(公告)号：CA2348913A1

公开(公告)日：2000-06-02

申请号：CA2348913

申请日：1999-11-12

Applicant: ERICSSON TELEFON AB L M

Inventor： SVEDBERG JONAS ,  EKUDDEN ERIK ,  JOHANSSON INGEMAR ,  UVLIDEN ANDERS

IPC: G10L25/78 ,  G10L11/02 ,  G10L15/00 ,  G10L19/012 ,  G10L19/04 ,  G10L19/14 ,  G10L15/20

Abstract: Perceptually relevant non-speech information can be preserved during encodin g of an audio signal by determining whether the audio signal includes such information (122, 124, 125). If so, a speech/noise classification of the aud io signal is overriden (43) to prevent misclassification of the audio signal as noise.

公开(公告)号：AU6377499A

公开(公告)日：2000-04-03

申请号：AU6377499

申请日：1999-09-10

Applicant: ERICSSON TELEFON AB L M

Inventor： JOHANSSON INGEMAR ,  SVEDBERG JONAS ,  UVLIDEN ANDERS

IPC: G10L19/12 ,  G10L19/08 ,  H03M7/36 ,  G10L19/00 ,  G10L19/14

Abstract: In producing an approximation of an original speech signal from encoded information about the original speech signal, current parameters (EnPar(i)) associated with a current segment of the original speech signal are determined from the encoded information. Reproduction of a noise component of the original speech signal is improved by using at least one of the current parameters and corresponding previous parameters respectively associated with previous segments of the original speech signal (31, 37, 39) to produce a modified parameter (EnPar(i) mod ). The modified parameter is then used (25, 40) to produce an approximation of the current segment of the original speech signal.

公开(公告)号：AU6375699A

公开(公告)日：2000-04-03

申请号：AU6375699

申请日：1999-08-24

Applicant: ERICSSON TELEFON AB L M

Inventor： UVLIDEN ANDERS ,  SVEDBERG JONAS

IPC: G10L19/22 ,  H03M7/30 ,  H03M7/36 ,  G10L19/12

Abstract: A multi-codebook fixed bitrate CELP signal block encoder/decoder includes a codebook selector ( 22 ) for selecting, for each signal block, a corresponding codebook identification in accordance with a deterministic selection procedure that is independent of signal type. Included are also means for encoding/decoding each signal block by using a codebook having the selected codebook identification.