Unlock instant, AI-driven research and patent intelligence for your innovation.

Encoding-decoding system, decoding device, encoding device, and encoding-decoding method

An encoding, decoding and encoding technology, applied in the field of encoding and decoding systems, can solve the problems of missing encoded signal frames, difficult decoding, transmission errors in transmission lines, etc., and achieve the effect of sound loss suppression

Inactive Publication Date: 2014-05-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In unstable transmission lines such as broadcast waves and the Internet, in the case of transmitting a coded signal that is a signal obtained by encoding a sound signal as described above, a transmission error may occur in the transmission line, and the error may occur on the decoding side. Causes missing frames that make up the encoded signal
In this case, sometimes there is a problem that it is difficult to decode immediately even though the decoding side has been able to receive the frame normally

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Encoding-decoding system, decoding device, encoding device, and encoding-decoding method
  • Encoding-decoding system, decoding device, encoding device, and encoding-decoding method
  • Encoding-decoding system, decoding device, encoding device, and encoding-decoding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0078] Hereinafter, Embodiment 1 of the present invention will be described.

[0079] First, the configuration and simple operation of the codec system will be described.

[0080] image 3 It is a block diagram showing the configuration of the codec system according to the first embodiment.

[0081] like image 3 As shown, the codec system 300 includes a characteristic determination unit 301 , an encoding unit 302 , an overlapping unit 303 , a transmission unit 304 , a decoding unit 305 , a reception unit 307 , and a packet loss detection unit 308 .

[0082] The characteristic determination unit 301 determines whether the audio signal input to the codec system 300 is an audio signal or an audio signal for every predetermined number of samples (per frame). Specifically, the characteristic determination unit 301 determines whether the encoding unit is a speech signal or an acoustic signal based on the acoustic characteristic of the frame.

[0083] More specifically, first, t...

Embodiment approach 2

[0146] Hereinafter, Embodiment 2 of the present invention will be described.

[0147] In Embodiment 1, an example in which the packet loss detection unit 308 detects the loss of packet data (transmission determination information) based on the number of IP packet resends and the number of IP packet repairs has been described, but the detection method of packet data loss is not limited to this. In Embodiment 2, an example in which the packet loss detection unit 308 detects a packet data loss based on the amount of network delay will be described.

[0148] In addition, in Embodiment 1, when the characteristic determination unit 301 receives a packet loss notification, the encoding unit 302 performs encoding by either the speech signal encoding process or the audio signal encoding process until the packet loss is stably resolved. . On the other hand, Embodiment 2 is characterized in that, when the characteristic determination unit 301 receives a notification of packet loss, the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An encoding-decoding system (300) comprises: a characteristic determination unit (301) for determining whether a sound signal is a vocal signal or an acoustic signal; an encoding unit (302) for encoding the sound signal into an encoded signal on the basis of the determination by the characteristic determination unit (301); a transmission unit (304) for transmitting the encoded signal; a receiving unit (307) for receiving the encoded signal; a decoding unit (305) for decoding the encoded signal; and a packet loss detection unit (308) for detecting the loss of the encoded signal data and reporting the detection result to the characteristic determination unit (301). When receiving the report on the loss of data, the characteristic determination unit (301) controls the encoding unit (302) such that the sound signal is encoded into an encoded signal comprising frames which can be independently decoded.

Description

technical field [0001] The present invention relates to an encoding and decoding system for efficiently encoding and decoding an audio signal or a voice signal. Background technique [0002] A method for encoding and decoding a digitized audio signal or audio signal (hereinafter, also referred to as audio signal) at a low bit rate has been developed. For example, the HE-AAC (High-Efficiency Advanced Audio Coding) method (refer to Non-Patent Document 1) and the AMR-WB (Adaptive Multi-Rate Wideband) method (refer to Non-Patent Document 2) are typical ones. In addition, in recent years, an MPEG-USAC (Unified Speech and Audio Coding) method that can more efficiently encode speech signals and audio signals has been developed (Non-Patent Document 3, hereinafter also referred to as USAC). [0003] Non-Patent Document 1: AES Convention Paper "A closer look into MPEG-4 High Efficiency AAC" [0004] Non-Patent Document 2: IEEE TRANSACTIONS ON AUDIO, SPEECH, AND LANGUAGE PROCESSING, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/005G10L19/18G10L25/78
CPCG10L25/78G10L19/18G10L19/005G10L19/0017
Inventor 石川智一则松武志
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD