Title:
スピーチ符号化における前方向誤り訂正
Document Type and Number:
Japanese Patent JP4931318
Kind Code:
B2
Abstract:
An improved forward error correction (FEC) technique for coding speech data provides an encoder module which primary-encodes an input speech signal using a primary synthesis model to produce primary-encoded data, and redundant-encodes the input speech signal using a redundant synthesis model to produce redundant-encoded data. A packetizer combines the primary-encoded data and the redundant-encoded data into a series of packets and transmits the packets over a packet-based network, such as an Internet Protocol (IP) network. A decoding module primary-decodes the packets using the primary synthesis model, and redundant-decodes the packets using the redundant synthesis model. The technique provides interaction between the primary synthesis model and the redundant synthesis model during and after decoding to improve the quality of a synthesized output speech signal. Such "interaction," for instance, may take the form of updating states in one model using the other model.
Inventors:
Svedberg, Jonas
Sand cubist, gym
Uvliden, Andels
Nordgren, Andels
The Western, Magnus
Sand cubist, gym
Uvliden, Andels
Nordgren, Andels
The Western, Magnus
Application Number:
JP2001583504A
Publication Date:
May 16, 2012
Filing Date:
May 10, 2001
Export Citation:
Assignee:
Telefon Akti Bora Get Elm Ericson (Pubble)
International Classes:
H03M7/36; H04L1/00; G10L19/00; H04L1/08
Domestic Patent References:
| JP9182067A | ||||
| JP2092037A | ||||
| JP2000078116A |
Foreign References:
| WO1998016016A1 |
Other References:
Colin Perkins, et al.,A Survey of Packet Loss Recovery Techniques for Streaming Audio,Network, IEEE,1998年10月,vo.12, no.5,p.40-48
Attorney, Agent or Firm:
Sonoda Yoshitaka
Kobayashi Yoshinori
Kobayashi Yoshinori