JP2005038512A - Video signal recording device and chapter creating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for automatically creating a chapter when a reproducing video signal is reproduced from a magnetic tape recording medium, and the video signal recording device of a disk medium on which the method is mounted. <P>SOLUTION: The video signal recording device of a disk medium is provided, which is capable of performing automatic chapter recording by detecting the discontinuous point of input time information and recording predetermined information in a chapter recording area with the position of the discontinuous point set as chapter information. when a magnetic tape recording medium is reproduced back, a video signal and time information at the recording time of the video signal are input, and this reproducing video signal is coped. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a video signal recording / reproducing apparatus using a disk medium, and more particularly to recording of chapter information when a reproduced video signal from a magnetic tape recording medium is dubbed and recorded by this apparatus.

  Video tape recorders using magnetic tape recording media are still widely used as video signal recording and reproducing devices. However, in recent years, video signal recording / playback devices using optical disk media and hard disk media have been commercialized, and the combination of high-performance media and improved signal processing technology has resulted in longer image quality. However, products that replace video tape recorders have emerged in some applications.

As is well known, one of the features of a video signal recording / reproducing apparatus using a disk medium as compared with a tape medium is good accessibility during reproduction. That is, any recorded portion can be reproduced immediately.
In a system for reproducing recorded video software (disc) as a DVD (Digital Versatile Disc) player device, in order to take advantage of this feature, some information indicating a “scene break” called a chapter is previously stored in the video software. By specifying the chapters that the user wants to see, playback from the middle of the program can be performed immediately.

In the case of such video software, since the whole picture of the program is known in advance, it is possible to determine in advance where the chapter is to be inserted. It is difficult to insert chapters unless you know where the scene is.
In the following Patent Document 1 for the above problems, the time when the recording operation is temporarily stopped by the user manually by CM cut or the like or automatically by the CM automatic detection at the time of recording, and then the recording is resumed is “ It is defined as “separation of scenes”, and discloses a technique in which a place where this series of operations is performed is used as a chapter information part.

JP 2002-152636 A

In the above-mentioned Patent Document 1, the chapter information is “when the video signal recording operation is resumed from a paused state”, but this method is effective in the case of CM cut or the like. If you want to record chapter information when dubbing and recording the playback video signal of the video tape recorder, the playback side device (video tape recorder) and the recording side when the user comes to the specified location while watching the playback image It is necessary to pause both of the devices at the same time, and then to cancel the suspension. Therefore, inconvenience that cannot be done through dubbing recording (without manual operation until the end), pause and resume There is also a risk of incorrect operation.
The present invention has been made in view of the above problems, and provides an apparatus and method for automatically recording chapters when dubbing and recording a reproduced video signal of a video tape recorder with a video signal recording apparatus using a disk medium. It is intended to provide.

The present invention includes the following configurations (1) and (2) as means for solving the above-described problems. That is,
(1) Playing back a magnetic tape recording medium on which a video signal and time information whose time elapses regardless of whether recording of the video signal is interrupted or time is reset when recording is interrupted When using the dubbing recording of the video signal, video using a disk medium that records the video signal and the chapter information so that the recording restart point of the previous video signal recorded intermittently and the chapter information are synchronized. In the signal recording device,
Detecting means for detecting discontinuous points in time from the reproduced time information;
Chapter creation means for creating a chapter signal based on the information of the detected discontinuity points;
Chapter recording means for recording the created chapter signal on the disc medium;
Video signal recording means for recording the reproduced video signal on the disk medium;
A video signal recording apparatus comprising:
(2) In the video signal recording apparatus using a disk medium, when recording the reproduced video signal from the magnetic tape recording medium and the chapter information related to the reproduced video signal together,
A first step of inputting the playback video signal and time information when the playback video signal is recorded on a magnetic tape recording medium from a playback device of the magnetic tape recording medium;
A second step of detecting time discontinuities in the input time information;
A third step of creating chapter information based on the detected discontinuity information;
A method for creating chapter information, comprising:

In the present invention, when a video signal recorded by a video tape recorder such as a camcorder or a DVC movie is dubbed and recorded by a video signal recording apparatus using a disk medium, the time recorded simultaneously with the video signal on the magnetic tape recording medium By detecting discontinuous points of information and creating and recording chapters using the discontinuous points as chapter position information, it is possible to automatically record chapters without human intervention. As a result, since dubbing recording can be performed through, there is also an effect that there is no fear of erroneous operation.
Further, the discontinuous point of the time information is a point where the tape travel is temporarily stopped at the time of recording. Therefore, the scene is developed, and there is an effect that is optimal as chapter position information.

  Hereinafter, embodiments of the video signal recording apparatus and chapter creation method of the present invention will be described with reference to the drawings by way of preferred examples.

FIG. 1 shows a connection when dubbing recording is performed between a video signal recording / reproducing apparatus using a disk medium according to this embodiment and a video tape recorder. FIG. 1A shows an analog video tape. The connection with the recorder is shown in (B), which is the connection with the digital DVC movie.
In this embodiment, a DVD recording medium is used as the disk medium.

In the connection shown in FIG. 1A, a control signal is output together with video and audio signals from the analog video tape recorder 1, and each signal is input to the disc video signal recording / reproducing apparatus 3.
Of these signals, the Video and Audio signals are normal reproduction signals for dubbing recording, while the Control signal is a signal line through which information for creating chapters is transmitted in this embodiment. The RS-422 interface is used for the transmission of this Control signal as shown in the figure, but this interface is a relatively high-speed transfer that is typically used in video tape recorders for broadcasting and business use. A bi-directional serial interface with speed, and usually transmits control commands, statuses, and time codes. In the present embodiment, only the portion for transmitting time information (time code) using this Control signal line is involved, and therefore other portions are omitted for the sake of simplicity of explanation.
The analog video tape recorder 1 has a function of recording time information described below at the time of recording. As an example, there is a commercial camcorder (camera integrated video tape recorder).
In this embodiment, the RS-422 interface is used. However, the present invention is not limited to this, and other interfaces such as RS-232C may be used.

Next, time information transmitted through the Control signal line will be described.
The analog video tape recorder 1 on the reproduction side outputs the time information through the control signal line in response to an inquiry from the recording-side disc video signal recording / reproduction device 3 via the control signal line. To do. At this time, as the time information used in this embodiment, information having the contents shown in FIG. 2A or 2B is recorded on the tape together with the Video and Audio signals in advance.
That is, FIG. 2A shows a form in which time is accumulated as the time elapses as time information, but when “Pause” or “Stop” is performed during recording. Even if the tape running is stopped, the time elapses. Therefore, the time information when the recording is resumed is stopped as shown at points (a), (b) and (c) in FIG. The recording of time information is started from the time after the elapsed time has elapsed. As a time information source for recording in this way, the clock time (current time) at the time of recording may be used.

FIG. 2B resets time information when “pause” or “stop” is performed during recording. Points (a), (b), and (c) in FIG. Represents a point. Such time information recording has a time generation unit inside, time information starts at the start of recording, and when pause or stop is performed, the time information is reset along with the stop of tape running, and then recorded. It is sufficient to start from the initial value by restarting.
In the case of FIG. 2B, the time information generated in the time generation unit is not reset, and the passage of time is continued as it is, the time information in the same form as in FIG. Also, the time information may be recorded with a different content depending on the mode in which the tape travel is stopped, by combining the time information to be continued when the recording is “pause” and resetting when the recording is “stop”.

Next, the dubbing connection with the DVC movie 2 shown in FIG.
The DVC movie 2, which is a digital recording video tape recorder, uses an IEEE1394 interface as shown in FIG. This interface packetizes Video, Audio signals and various control signals and performs time division transmission. Although this specification varies depending on the device even if the same IEEE1394 interface is used, it is standardized as a transmission format of the DV specification for DVC movies.
Accordingly, it is natural that the receiving-side disc video signal recording / reproducing apparatus 3 is compatible with this interface. As a result, the disc video signal recording / reproducing apparatus 3 has the same configuration as that shown in FIG. In addition, time information is input together with the Video and Audio signals. The DVC movie 2 needs to be recorded so that the time information shown in FIG. 2A or 2B can be recorded.

Next, a disc video signal recording / reproducing apparatus with a chapter creation function in this embodiment will be described with reference to FIG. Here, only the recording function will be described, and the reproduction function will be omitted.
In FIG. 3, there are three types of input signals coming from the outside: Video, Audio signal and time information as shown in FIGS. This input signal is appropriately signal-processed by the input signal processing circuit 4 according to the analog and digital signals, and the video and audio signals are supplied to the encoder circuit 5 and the time information is supplied to the time information input unit 7, respectively.
The analog or digital video and audio signals supplied to the encoder circuit 5 are encoded into MPEG signals here. The MPEG encoding specifications used here are standardized when recording Video and Audio signals on a DVD recording medium. For audio signals, an encoding method other than MPEG may be used.
Next, the encoded video and audio signals are supplied to the disk recording unit 6 together with supplementary information including a chapter signal described later, and are recorded in a predetermined format on the DVD recording medium.

On the other hand, the time information supplied to the time information input unit 7 is converted into data necessary for subsequent processing and supplied to the memory circuit 8 and the discontinuous point detection unit 9.
The discontinuity detection unit 9 is a part that detects whether the input time information changes regularly. The discontinuous point detection unit 9 compares the previous data from the memory circuit 8 with the incoming data, and the difference between them is predetermined. If it exceeds the range, it is judged as discontinuous. The predetermined range differs depending on the data interval of the time information, but can be easily obtained from the data interval when the first continuous time information comes in. Moreover, when it is determined in advance, the value may be set.
In FIGS. 2A and 2B, the points indicated by a, b, and c are detected as discontinuous points in time information. According to the above detection method, discontinuous points can be detected in the same manner in both cases (A) and (B) of FIG.
When the above-mentioned discontinuous points a, b, and c are detected by the discontinuous point detection unit 9, pulses are supplied to the chapter creation control unit 10 at each timing, and information necessary for chapter creation is stored here in the encoder circuit. 5 is supplied. The encoder circuit 5 creates a chapter signal based on the supplied chapter information and supplies it to the disc recording unit 6 together with the MPEG encoded signal. The disc recording unit 6 records the chapter signal in a predetermined format on the DVD recording medium.

In this way, since the points indicated by a, b, and c in FIGS. 2A and 2B are recorded on the DVD recording medium as chapter position information, when reproducing the DVD recording medium, a, b If the location of c is designated, the location can be reproduced immediately.
In addition, the discontinuous point of this time information is a place where “pause” or “stop” was made when this video was recorded, so that the video scene changes, and is a suitable point as chapter position information.
Note that the video frame after this discontinuity is recorded as a still image and thumbnails are recorded on the DVD recording medium in association with this chapter, so that the scene at the chapter location can be seen at a glance at the time of playback, and the chapter can be selected. It will be easy.

  It is important that chapter information is recorded on the disk medium in order to effectively record the video signal recorded on the tape medium on the disk medium and effectively utilize the good access at the time of reproduction, which is a feature of the disk medium. is there. The present invention uses a tape medium for recording, and uses a disk medium for viewing and editing to select scenes later, making it more convenient for use in future products. Can be said to be expensive.

It is a figure which shows the example of a connection at the time of the dubbing recording which concerns on a present Example. It is a figure explaining the time information in a present Example. It is a block diagram of the part in connection with chapter recording of the disc video signal recording / reproducing apparatus in a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Analog video tape recorder 2 DVC movie 3 Disc video signal recording / reproducing apparatus 4 Input signal processing circuit 5 Encoder circuit 6 Disc recording part 7 Time information input part 8 Memory circuit 9 Discontinuous point detection circuit 10 Chapter creation control part

Claims (2)

A magnetic tape recording medium on which a video signal and time information whose time elapses regardless of whether recording of the video signal is interrupted or time is reset when recording is interrupted is reproduced, and the video Video signal recording apparatus using a disk medium for recording the video signal and the chapter information so that the recording restart point of the previous video signal recorded intermittently and the chapter information are synchronized when performing dubbing recording of the signal In
Detecting means for detecting discontinuous points in time from the reproduced time information;
Chapter creation means for creating a chapter signal based on the information of the detected discontinuity points;
Chapter recording means for recording the created chapter signal on the disc medium;
Video signal recording means for recording the reproduced video signal on the disk medium;
A video signal recording apparatus comprising: In the video signal recording apparatus using a disk medium, when recording the reproduced video signal from the magnetic tape recording medium and the chapter information related to the reproduced video signal, in the chapter information creating method,
A first step of inputting the playback video signal and time information when the playback video signal is recorded on a magnetic tape recording medium from a playback device of the magnetic tape recording medium;
A second step of detecting time discontinuities in the input time information;
A third step of creating chapter information based on the detected discontinuity information;
A method for creating chapter information, comprising:

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