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Signal decoding device

A decoding device and signal technology, applied in the direction of code conversion, electrical components, etc., can solve the problems of increasing the amount of transmitted information, communication costs and line usage, and achieve the effect of suppressing large and good decoding signals and suppressing abnormal noise

Active Publication Date: 2007-07-18
III HLDG 12 LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In response to this, in the relay device (broadcasting device), only the voice / audio signal coded in the coding device is simply multiplexed with coded additional information and transmitted , the amount of information to be transmitted will increase significantly, which will greatly increase the communication cost and line utilization rate, so it is necessary to try to solve this problem

Method used

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Embodiment approach 1

[0044] In Embodiment 1 of the present invention, a case will be described in which audio information requiring immediacy (for example, local emergency disaster information, etc.) is used as additional information, and the additional information takes precedence over the transmitted audio / audio signal.

[0045] FIG. 1 is a diagram showing a system configuration including a relay device according to the present embodiment. The signal coding device 101 codes the input signal using the CELP type speech coding method according to the transmission mode information (SMI), and sends the coded information obtained through the transmission path A102 to the relay device 103 .

[0046] When the relay device 103 receives additional pattern information (AMI) and additional information, it performs a process of adding the additional information to the coded information transmitted through the transmission path A102, and adds the processed coded information (hereinafter referred to as "transfo...

Embodiment approach 2

[0169] In Embodiment 1 above, although the case where voice / audio information is used as additional information input to the relay device has been described, the present invention is not limited thereto. The same applies to the information provided as additional information.

[0170]However, for additional information with a large amount of information such as image information, if the amount of information in one frame is insufficient in consideration of the compression rate of encoding, etc., it must be divided into multiple frames and added. Also, for voice / audio signals, etc., since the transmission bit rate of the coding method transmitted from the transmitting end is small, it is conceivable that the specified additional information mode cannot be added within one frame.

[0171] Therefore, in Embodiment 2 of the present invention, a case will be described in which the relay device divides and adds additional information into a plurality of frames and transmits it to the...

Embodiment approach 3

[0203] In Embodiment 3 of the present invention, a case will be described in which, in Embodiment 1 and Embodiment 2 above, processing for reducing abnormal noise that occurs when the number of layers of encoding information is switched when additional information is added will be described. abnormal noise. In addition, the overall system configuration of the present embodiment is the same as that of FIG. 1 described in the first embodiment.

[0204] In the present embodiment, the data structure output from the signal encoding device 101 is as shown in FIG. 11 , and the additional information flag of the first embodiment is extended and assigned as new additional processing state information (initial value is 0). The additional processing status information (APSI) will be described later.

[0205] The function of the relay device 103 of this embodiment will be described below. Additional pattern information and additional information are input to the relay device 103 . When...

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Abstract

A signal decoding apparatus that can suppress any large unusual sounds to provide decoded signals of improved audibility even when the number of hierarchical layers to be used in the decoding process varies due to a packet loss or the like in communication utilizing a scalable encoding / decoding technique. In the signal decoding apparatus, a gain adjusting part (2308) adjusts, based on a control of a decoding control part (2301), the gain of a basic layer decoded signal outputted from a basic layer decoding part (2302). A gain adjusting part (2309) adjusts, based on a control of the decoding control part (2301), the gain of a first expansion layer decoded signal outputted from a first expansion layer decoding part (2303). A gain adjusting part (2310) adjusts, based on a control of the decoding control part (2301), the gain of a second expansion layer decoded signal outputted from a second expansion layer decoding part (2304).

Description

technical field [0001] The present invention relates to a signal decoding device for a communication system for encoding and transmitting a signal. Background technique [0002] In the field of packet communication systems represented by Internet communication and mobile communication systems for transmitting voice / audio signals, people expect to transmit additional voice / audio information such as news information, text information or technologies such as image information. [0003] In this regard, in the relay device (broadcasting device), if only the speech / audio signal coded in the coding device is simply multiplexed and coded for additional information, the amount of information to be transmitted will increase significantly, thereby causing communication costs and Line usage has increased significantly, so something needs to be done to address this. [0004] As a prior art in this field, it has been disclosed that when a voice signal is transmitted between portable ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30
Inventor 山梨智史佐藤薰森井利幸
Owner III HLDG 12 LLC
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