TH29120A - Methods and arrangements in telecommunication systems - Google Patents

Abstract

DC60 (19/03/41) This invention involves methods and devices used to reproduce comfortable sound in Linear predictive speech decoder that works intermittently, such as dealing with data frames. Which alternates between speech information (Fs) and ambient sound (FSID) during the decoding of the received data frame (F (n)) with ambient sound describing a number of parameters (K) of These frames (FSID [m] received directly before the speech fram (FS [m + 1]) are extracted and replaced with frames that Describe Ambient Sound (FSID [m-1]). One or more previously received sounds (M) of frames describing ambient sounds (FSID [m + j + 2]) that are received immediately after. The sequence of speech frames (FS [m + 1], ..., FS [m + 1 + j]) is discarded during decoding and replaced with frames describing the ambient sound. One or more (FSID [m + j + 2]) received before the sequence. Speaking of speech frames (FS [m + 1], ..., F [m + 1 + j]) causes minimal degradation of the information of the ambient sound and provides a suitable comfortable sound on the receiver. The invention involves methods and devices used to reproduce comfortable sounds in a non-continuous linear predictive speech decoder such as manipulating data frames. Which alternates between speech information (Fs) and ambient sound (Fsid) during decoding of received data frames (F (n)) with ambient sound describing a number of parameters (K) of These frames (Fsid [m] received directly before the speech fram (Fs [m + 1])) are excluded. And replace it with a frame that Describes one or more ambient sounds (Fsid [m-1]) that Received earlier Another number (M) of frames describing the ambient sound (Fsid [m + j + 2]) received immediately after the sequence of speech frames (Fs [m + 1], ..., Fs [m + 1). + j]) will be discarded during Decoding and replacing it with a frame describing the sound surrounding the sound. One or more (Fsid [m + j + 2]) received before the sequence. Saying speech frames (Fs [m + 1], ..., Fs [m + 1 + j]) causes the least degradation of the information of the surrounding sound and gives the Comfortable sound that is appropriate on the receiver.

Claims (1)

1.Methods for long-distance communication systems Where information is spoken (S) is transmitted from the transmitter to the receiver. Where the speech information (S) for the given speech connection is transmitted at intermittent intervals as a data frame (F). They can be speech frames (Fs) and in other words a fram describing the ambient sound (Fsid) on the receiver side. Produces ambient sound from the received ambient sound used to describe the fram (Fsid), where the parameter that describes the ambient sound on the transmitter is calculated by separating the contents of the tag: