Data processing device and data processing method

一种数据处理装置、数据处理的技术，应用在数字记录/再现、电视、彩色电视的零部件等方向，能够解决废弃等问题

Inactive Publication Date: 2006-08-02
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, after the value (APTS_f) of the playback time information of the audio frame that should be output at the time Tf is smaller than the value (VPTS_c) of the playback time information of the video image that should be output at the time Tc, in the playback device of the prior art, Before or during playback of video in the second section, the audio stream in the third section is discarded
Especially when APTS_f is much smaller than VPTS_c, a large amount of audio stream data in the third section is discarded, and there is a problem that there is no sound at all even if the image in the third section starts to be reproduced.
[0035] In addition, the value of the playback time information (APTS_f) at the time Tf is greater than or equal to the value of the playback time information (VPTS_c) of the first video image in the second section, and is greater than the value of the playback time information (VPTS_d) of the last video image. In the following cases, there is also a problem that the sound of the third section that should be reproduced from the time Tf starts to be reproduced during the image reproduction of the second section.

Method used

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  • Data processing device and data processing method
  • Data processing device and data processing method
  • Data processing device and data processing method

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Embodiment Construction

[0073] Next, the data processing apparatus of the present invention will be described with reference to the drawings. First, the data structure of the data stream, which is the object of processing, will be described, and then the playback device which is an embodiment of the data processing device will be described.

[0074] In this embodiment, a data stream will be described as a transport stream (hereinafter referred to as "TS" or "transport stream") defined by the MPEG2 standard ISO-13818-1. The TS is widely known as one form of a system stream in which an audio stream and a video stream are multiplexed.

[0075] FIG. 5 shows the data structure of the transport stream 20. As shown in FIG. The transport stream 20 includes a plurality of TS object units (TSOBject Unit; TOBU) 21, and the TOBU 21 is composed of one or more transport packets (TS packets). TS packs, for example: in addition to storing the video TS pack (V_TSP) 30 of compressed and encoded video data, and the a...

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Abstract

A data processing device reproduces video and audio from a data stream containing video data and audio data added by time information indicating a reproduction timing. The device includes: a stream acquisition section for continuously acquiring a first and a second data stream; an insertion section for inserting dummy data indicating a boundary between the data streams; an analysis section for detecting the dummy data and correlating the identification information to video data and audio data of each data stream; a control section for controlling the output timing of video data and audio data according to each time information of the video data and the audio data to which the same identification information is correlated; and an output section.

Description

technical field [0001] The present invention relates to a technique for decoding and reproducing coded audio and image data, and in particular to a technique for synchronously reproducing corresponding audio and images in the same data stream when the audio and image are continuously reproduced from multiple data streams. Background technique [0002] In the past few years, with the development of digital technology, it has been possible to encode the data of images and sounds related to animation, still pictures, etc., and record them as encoded data streams on recording media such as optical discs and hard disks. For example, according to the MPEG standard (ISO11172 or ISO13818), audio is coded as an audio coded stream, and images are coded as a video coded stream, respectively. Then, the data packets storing each coded data are arranged in chronological order, and are multiplexed to form a coded data stream. This multiplexing process of encoded data streams is called "sy...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04N5/92H04N5/93G11B20/10G11B27/10H04N5/04H04N5/44
CPCH04N5/04H04N5/4401H04N9/8211H04N21/44004H04N21/4307H04N21/4392H04N21/426H04N21/43072
Inventor片山大朗藤本和生则竹俊哉佐伯慎一
OwnerPANASONIC CORP