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Method and device of signal processing

A signal processing device and signal processing technology, applied in the field of signal processing, can solve problems such as energy mutation and noise, and achieve the effect of avoiding musical noise

Inactive Publication Date: 2009-10-14
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

from Figure 4 It can be seen from the figure that there is a sudden change in energy when the final output signal frame N transitions to frame N+1, and if it is at the end of the speech and the frame length is long, too long voiced sounds with the same amplitude will cause musicality noise

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  • Method and device of signal processing
  • Method and device of signal processing
  • Method and device of signal processing

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Embodiment Construction

[0068] The embodiments of the present invention will be further described below in conjunction with the drawings and examples.

[0069] Embodiment 1 of the present invention provides a signal processing method for processing synthetic signals in packet loss concealment, such as Figure 5 shown, including the following steps:

[0070] Step s101 , the next adjacent frame after the missing frame is detected is a good frame.

[0071] Step s102, acquiring the signal of the good frame and the energy ratio of the synthesized signal at the same time.

[0072] Step s103, adjusting the synthesized signal according to the energy ratio.

[0073] A signal processing method in an embodiment of the present invention is described below in combination with specific application scenarios.

[0074] In Embodiment 1 of the present invention, a signal processing method is provided, which is used for processing the synthesized signal in packet loss concealment. The schematic diagram of the princi...

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Abstract

The present invention discloses a signal processing method adapted to process a synthesized signal in packet loss concealment. The method includes the following steps: receiving a good frame following a lost frame, obtaining an energy ratio of energy of a signal in the signal of the good frame signal to energy of a synthesized signal corresponding to the same time of the good frame; and adjusting the synthesized signal in accordance with the energy ratio. The present invention also discloses a signal processing apparatus and a voice decoder. Through using the method provided by the present invention, the synthesized signal is adjusted in accordance with the energy ratio of the energy of the first good frame following the lost frame to the energy of the synthesized signal to ensure that there be not a waveform sudden change or an energy sudden change at the place where the lost frame and the first good frame following the lost frame are jointed in the synthesized signal, to realize the waveform's smooth transition and to avoid music noises.

Description

technical field [0001] The present invention relates to the field of signal processing, in particular to a signal processing method and processing device. Background technique [0002] In a real-time voice communication system, real-time and reliable voice data transmission is required, such as a VoIP (Voice over IP, voice over IP) system. However, due to the unreliable nature of the network system itself, data packets may be discarded or fail to reach the destination in time during transmission from the sender to the receiver, and both of these situations are considered network packet loss by the receiver. The occurrence of network packet loss is inevitable, and it is also one of the most important factors affecting the quality of voice calls. Therefore, in real-time communication systems, a robust packet loss concealment method is needed to recover lost data packets, so that in the case of network packet loss still get good call quality. [0003] G.722 is a speech coding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04M7/00G10L19/005
CPCG10L19/005G10L19/04
Inventor 詹五洲王东琦涂永峰王静张清苗磊许剑峰胡晨杨毅杜正中齐峰岩
Owner HUAWEI TECH CO LTD
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