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Audio processing method in mobile digital television recording

A technology for video recording and audio processing, applied in color TV parts, TV system parts, TV and other directions, can solve the problems of audio and video code stream errors, signal instability, etc., to achieve smooth playback and application fields. flexible effects

Active Publication Date: 2013-05-08
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] Mobile digital TV signals are extremely unstable due to weather conditions, distance from the transmission source, etc., and it is inevitable that the audio and video code streams in the digital TV signals received by end users have bit errors

Method used

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  • Audio processing method in mobile digital television recording
  • Audio processing method in mobile digital television recording
  • Audio processing method in mobile digital television recording

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Embodiment Construction

[0030] figure 1 It shows a schematic flow chart of an audio processing method in a mobile digital television video recording according to the present invention, and the method includes the following steps:

[0031] (1), AAC+ audio decoder initialization: the application caller encapsulates each AAC+ code stream raw data frame received from the air into an audio data transport stream (ADTS) format frame, which is used for AAC+ decoder decoding and audio and video synchronization ;The audio data transport stream (ADTS) format is: add a 7-9 byte ADTS frame header and a 4-byte timestamp in front of each frame of AAC+ code stream; the ADTS frame header is used to locate the AAC+ code during decoding The beginning of the stream frame for subsequent decoding; the time stamp is time information, which is used for the control of audio and video synchronization; AAC+ code stream raw data is the code stream data that is not encapsulated into ADTS.

[0032] (2), the AAC+ decoder parses t...

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Abstract

The invention discloses an audio processing method in mobile digital television recording. The method comprises the following steps of: packaging each advanced audio coding + (AAC+) code stream naked data frame which is received from the air into a frame in an audio data transport stream (ADTS) format; analyzing an ADTS frame head to find the original AAC+ code stream naked data of the frame; decoding the AAC+ code stream naked data, removing spectral band replication (SBR) information from the AAC+ code stream naked data in an audio decoding, recording and buffering area, and converting the AAC+ code stream naked data in the audio decoding, recording and buffering area into AAC naked data; and performing a subsequent decoding process by using an AAC+ decoder, and transmitting the AAC naked data to a recording module to record video and audio files. By the method, the mobile digital television recording also can be performed even if the signal is poor, and a recorded video file can benormally played on a computer by mainstream video play software, and severe abnormal phenomena such as harsh noise, silence, player breakdown, system crash and the like are avoided.

Description

technical field [0001] The invention relates to an audio processing method, in particular to an audio processing method in mobile digital television video recording. Background technique [0002] In recent years, with the rapid development of mobile digital TV, various mobile digital TV standards have emerged, such as Japan's ISDB-T (Terrestrial Integrated Services Digital Broadcasting), China's CMMB (China Mobile Multimedia Broadcasting) and so on. Many portable handheld devices, such as mobile phones, digital cameras, navigators, etc., have added the function of mobile digital TV. People can keep the picture clear no matter they are moving at high speed or in a fixed state. It greatly satisfies people's demand for information in a fast-paced society. However, as a broadcasting program, the mobile digital TV program will be found to be a very important function if you miss it, or when you encounter a favorite program and need to collect it. For video recording, the code s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00H04N5/76
Inventor 李军汤雪钗陈占东王彦飞胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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