JP3843682B2 - Optical disc video recording / reproducing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical disc video recording / reproducing apparatus for recording video data .
[0002]
[Prior art]
As a recording / reproducing apparatus using an optical disk, for example, an apparatus described in JP-A-11-155130 has been proposed. In the device disclosed in this publication, there is a description that the video signal is compressed in real time and the AV management table data used for reproduction is generated and recorded on the optical disc. , Described as a single.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to prevent mixed recording of video data of different television systems (for example, NTSC signal, PAL signal) on the same optical disk.
[0004]
[Means for Solving the Problems]
In order to solve the above problems , in the present invention, an optical disc video recording / reproducing apparatus generates management data for managing video data, writing means for writing the video data and the management data on an optical disc, and writing on the optical disc. Read out means for reading out the video data and the management data, means for reproducing the video data using the management data, and video data of a different television broadcasting system is recorded on the optical disc. Preventive measures will be provided. More specifically, the AV management table data, television broadcast system (e.g. NTSC signal, PAL signal) of the recorded video signal Taseru lifting the video attribute data region showing. Further, in the optical disc video recording and reproducing apparatus, Taseru lifting information indicating corresponds to which television broadcast system. The way of holding the information may be realized by an electric circuit. Alternatively, it may be written in a semiconductor memory and read from a program. As for the discriminating method, the video attribute is read from the AV management table data before the recording is started, and further, the television broadcasting system data corresponding to the optical disc video recording apparatus is read from the electric circuit or the semiconductor memory, and is compared and discriminated. To prevent mixing. As a preventive means, a warning message is issued to notify the user. When there is no video attribute in the AV management data table, the comparison process is invalid.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram schematically showing a control system of an optical disc video recording / reproducing apparatus. FIG. 2 is a diagram showing a part including a video attribute in a hierarchical diagram of an AV management table file used for reproducing video data obtained by compressing an input video signal in real time. FIG. 3 is a flowchart for comparing and determining the recorded television broadcast video attribute and the television data corresponding to the optical disc video recording / reproducing apparatus.
[0006]
First, the configuration will be described. 1 is an optical disc video recording / reproducing apparatus, 2 is a system control unit, 3 is a CPU, 4 is a main memory, 5 is a work memory, 6 is an MPEG CODEC, 7 is a video signal processing unit, 8 is a video signal input unit, and 9 is a video Signal output unit 10 is an audio signal input unit, 11 is a converter from an analog signal to a digital signal, 12 is a converter from a digital signal to an analog signal, 13 is an audio signal output unit, 14 is an audio buffer, 15 is A bus interface unit, 16 is an optical disc control unit, 17 is a rewritable optical disc, and 18 is a warning message data processing unit.
[0007]
Next, the optical disc video recording / reproducing apparatus 1 used in the embodiment will be described.
[0008]
The CPU 3, work memory 5, and main memory 4 of the system control unit 2 connected to the bus execute the program stored in the main memory 4 to control the entire apparatus such as video / audio signal recording / playback operations. Do.
[0009]
At the time of recording, the video signal is fetched from the video signal input unit 8 and enters the video signal processing unit 7. The video data encoded by the MPEG CODEC unit 6 is stored in the work memory 5 via the bus. Audio is taken in from the audio signal input unit 10 and stored in the audio buffer 14 as data converted into a digital signal by the A / D converter 11. After the MPEG encoding process is performed by the CPU 3, it is stored in the work memory 5 via the bus. . Further, the CPU 3 sequentially generates various data stored in the work memory 5 as an MPEG stream, and sends the MPEG stream to the optical disc control unit 16 via the bus I / F unit 15. The optical disk control unit 16 has a track buffer for reading and writing data, and when the optical disk 17 can be accessed, the optical disk control unit 16 writes the data in the track buffer to the optical disk 17 and performs an MPEG stream recording operation. Complete. AV management table data used at the time of reproduction is created together with the generation of MPEG stream data. The AV management table data is read from the optical disc 17 and developed in the work memory 5 when the power is turned on.
[0010]
Data update processing to the AV management table on the work memory is performed for each recording, and the contents thereof are the logical address information and time information of MPEG data recorded on the optical disc 17. Also, TV system information of the video signal is added at the start of recording. AV management table data is written to the optical disc 17 when the power is turned off.
[0011]
At the time of reproduction, MPEG stream data is read from the optical disc 17 into the work memory 5 via the optical disc control unit 16 and the bus I / F unit 15 via the bus, and the MPEG stream data is converted into video data and audio data according to the information of the AV management table data. Separately, the video signal is decompressed by the MPEG CODEC 6 and output to the video signal output unit through the video signal processing unit 7. The audio data is decompressed by the CPU 3 and then output to the audio signal output unit through the audio buffer 14 and the D / A converter 12.
[0012]
Hereinafter, this embodiment will be described with reference to FIGS. The AV management table data is expanded in the work memory 5 from the rewritable optical disc 17 that is loaded when the power is turned on. TV system information in the video attribute shown in FIG. 2 is read out from the developed AV management table data. Furthermore, the TV system data which the optical disk recording / reproducing apparatus 1 written in the main memory 4 supports is read and compared with the TV system. As a comparison result, in the case of a mismatch, the warning message data prepared in the main memory is read, and the data is superimposed on the video output data via the warning message data processing unit 18 to display a warning. If there is no match or there is no video attribute TV system data on the AV management table data, no warning message is displayed.
[0013]
【The invention's effect】
According to the present invention, mixed recording of video data of different television systems on the same optical disk can be prevented .
[Brief description of the drawings]
FIG. 1 is a block diagram for explaining an embodiment of the present invention.
FIG. 2 is a configuration diagram of an AV management table data file.
FIG. 3 is a flowchart for performing discrimination according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Optical disk recording / reproducing apparatus, 2 ... System control part, 3 ... CPU, 4 ... Main memory, 5 ... Work memory, 6 ... MPEG CODEC, 7 ... Video signal processing part, 8 ... Video signal input part, 9 ... Video signal Output unit, 10 ... audio signal input unit, 11 ... A / D converter, 12 ... D / A converter, 13 ... audio signal output unit, 14 ... audio buffer, 15 ... bus I / F unit, 16 ... optical disk control Reference numeral 17: A rewritable optical disk, 18: Warning message data processing section.

Claims (2)

Generating means for generating management data for managing video data;
Writing means for writing the video data and the management data on an optical disc;
Reading means for reading the video data and the management data written on the optical disc;
Means for reproducing the video data using the management data;
And prevention means for preventing the image data of the different television broadcasting systems on the optical disc is recorded,
Holding means for holding identification information relating to a television broadcast system of video data that can be written by the writing means;
The management data includes identification information related to a television broadcasting system of video data recorded on the optical disc,
The prevention means compares whether the identification information included in the management data matches the identification information held by the holding means, and prohibits writing of the video data to the optical disc if they do not match An optical disc video recording / reproducing apparatus characterized by the above. The optical disk video recording / reproducing apparatus according to claim 1.
An optical disc characterized in that the video data is written to the optical disc when the prevention means determines that the identification information included in the management data matches the identification information held by the holding means. Video recording / playback device.

Images