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Recording / reproducing apparatus and method

A recording device and playback technology, which is applied in the directions of color TV signal processing, TV, and color TV components, etc., can solve the problems of disordered playback images, unsuitable timing of output images, and increased circuit scale of the recording device, etc. Effect of reducing circuit scale

Inactive Publication Date: 2001-03-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, the program reference clock (PCR: Program Clock Reference), presentation time stamp (PTS: Presentation Time Stamp), and decoding time stamp (DTS: Decoding Time Stamp) attached to the input bit stream are recorded and played back as they are. Time information, so during special playback, there is a problem that the timing that is not suitable for the output image occurs, and the playback image is disturbed
In addition, when the time interval of multiplexing PSI as control information and the timing of multiplexing are not considered, when the time interval for obtaining PSI is large, there is a problem of disturbed playback images, or when two or more programs with different PSIs are involved In the case of special playback, when the program is switched, until the new PSI is obtained, there is a problem that the playback image is disordered
[0011] For the problems referred to above, although the method of monitoring the interval of data packets sent out during recording is considered for each double-speed playback, in the case of this method, a dedicated circuit for time management must be arranged for each double-speed playback. Therefore, the circuit scale of the recording device increase
In addition, time information is replaced during playback, and there is also a problem that the scale of the circuit increases after the playback device is configured.

Method used

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  • Recording / reproducing apparatus and method
  • Recording / reproducing apparatus and method

Examples

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no. 1 example

[0250] Fig. 1 is a block diagram showing the configuration of a recording apparatus according to a first embodiment of the present invention. In FIG. 1, the recording apparatus of the first embodiment includes a recording data generating unit 1 for normal playback, a recording data generating unit 2 for special playback, a packet generating unit 3, a control unit 4, a recording unit 5 and a recording head 6.

[0251] The recording data generating unit 1 for normal playback and the recording data generating unit 2 for trick playback respectively receive a bit stream 201 in the form of a transport packet composed of an image signal and an audio signal encoded using inter-picture correlation. The recording data generating unit 1 for normal playback generates recording data for normal playback composed of a predetermined plurality of recording blocks based on the input bit stream 201 . The trick playback recording data generator 2 generates trick playback (fast forward playback, r...

no. 2 example

[0294] In the second embodiment of the present invention, with respect to the above-mentioned first embodiment, it is considered that the playback data stream output during special playback needs to be output at a specified time interval input during recording to avoid trouble during decoding. A time (time stamp) for controlling playback stream output is added to the sync block.

[0295] Fig. 9 is a block diagram showing the configuration of a recording apparatus according to a second embodiment of the present invention. In FIG. 9 , the recording apparatus of the second embodiment includes a recording data generating unit 1 for normal playback, a recording data generating unit 2 for trick playback, a packet generating unit 3 , a control unit 4 , a recording unit 5 and a recording head 6 .

[0296] Furthermore, the recording data generating unit 2 for trick playback includes an I-picture extracting unit 21, a high-frequency component canceling unit 22, a storage unit 23, a PES ...

no. 3 example

[0302] In the third embodiment of the present invention, with respect to the above-mentioned first embodiment, in the trick playback record data generation unit 2, an attempt is made to generate fast-forward playback and reverse playback based on trick playback image data stored in one memory. These two types of recording data for special playback are used for playback. In addition, the configuration of the recording apparatus of the third embodiment is the same as that of the recording apparatus of the above-mentioned first embodiment, and the description of other configurations will be omitted by denoting the same reference numerals.

[0303] For the I-picture data output from the I-picture extracting unit 21, the high-frequency component canceling unit 22 cancels the AC coefficient representing the high-frequency component of the coded data to reduce the amount of data, and sequentially converts the image data for trick playback (high-frequency reduction processing) The sub...

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Abstract

A recording / reproducing apparatus and method is disclosed. A normal play recording data generating portion 1 generates normal play recording data from a bit stream 201. The trick play recording data generating portion 2 generates trick play recording data from the bit stream 201. A packet generating portion 3 generates a time information packet representing time information for managing the time when a reproduced image is outputted and a control information packet representing control information for decoding trick play recording data, and outputs each of the packets to the trick play recording data generating portion 2 such that the time information and the control information are respectively recorded at predetermined positions of a trick play area. A recording portion 5 respectively records through a recording head 6 normal play recording data in a predetermined normal play area on a recording medium 202 and trick play recording data in a trick play area on a recording medium. The recording / reproducing apparatus of this invention capable of obtaining a stable trickily played image at the time of trick play by simple processing without managing time for every double-speed reproduction.

Description

technical field [0001] The present invention relates to a recording / reproducing apparatus and method. In particular, it relates to a device for digitally recording / reproducing a bit stream composed of an image signal and an audio signal encoded by the correlation between pictures using digital satellite broadcasting, etc. A method of digital recording / playback. Background technique [0002] In recent years, practical use of digital satellite broadcasting using the "Moving Picture Experts Group" (MPEG: Moving Picture Experts Group) system has attracted attention. The MPEG system is a motion-compensated predictive coding method utilizing inter-picture correlation, and a group of pictures (GOP: Group Of Pictures) is formed of a plurality of frames. GOP is composed of I picture (I frame and I field) (intra-frame coded picture), P picture (interframe positive direction predictive coded picture) and B picture (bidirectional predictive coded picture). For example, when a GOP is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/7826H04N5/783H04N9/804H04N9/806H04N9/82
CPCH04N5/783H04N5/78263H04N9/8227H04N9/806H04N9/8042
Inventor 仓本吉泰松香寮中津悦人中垣浩文冈山睦之森本健嗣越智厚雄
Owner PANASONIC CORP