JP2007110429A - Playback device - Google Patents

Abstract

【Task】
Cue video data that matches the search criteria.
[Solution]
The system control circuit 28 displays a search setting menu screen on the display device 20. The user sets search conditions on the screen. The magnetic tape 26 is run at high speed, and the recorded video data is reproduced. The detection unit 32 detects the compression method, video method, frame rate, and aspect ratio of the reproduced video data. The magnetic tape 26 is run from the video data that matches the search conditions at the normal playback speed, and the video data is played back and displayed.
[Selection]
FIG.

Description

  The present invention relates to a playback apparatus for playing back video data.

  2. Description of the Related Art Conventionally, video cameras that record video signals on magnetic tape in different recording formats are known. The recording format elements include a compression method, a video signal method, a frame rate, and an aspect ratio.

  Examples of the compression method include an HD (High definition) video format and an SD (Standard definition) video format. Examples of the video signal system include an NTSC (National Television Standards Committee) video signal system, a PAL (Phase Alternation by Line) video signal system, and a SECAM (Sequential Couleur A Memory) video signal system. Examples of the frame rate include 60i (interlace) and 30F (frame). Aspect ratios include 16: 9 and 4: 3. This video camera reproduces video data based on these recording formats.

A video camera is also known to have a function of cueing a change point by using shooting date information or index information added at the time of shooting (Patent Documents 1, 2, 3, and 4).
JP 2002-300516 A JP 2002-218370 A JP 2000-215615 A JP 09-161455 A

  However, conventionally, when video information of a different recording format is recorded on a magnetic tape, there is no means for searching for desired video information, that is, no means for searching, and editing work has been very difficult.

  Accordingly, an object of the present invention is to provide a playback apparatus that can quickly access desired video information from a magnetic tape on which video information of different recording formats is recorded.

  In order to achieve the above object, a playback apparatus according to the present invention is a playback apparatus that plays back video information from a recording medium capable of recording a plurality of video information in different recording formats, and is a recording format that serves as a search condition. Determining means for sequentially specifying video information recorded on the recording medium, reading means for reading out the video information from the recording medium, and determining whether the video information read by the reading means meets the search condition And determining means.

  According to the present invention, since the recording formats are compared, desired video data can be searched quickly and can be searched.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration block diagram of an imaging apparatus according to Embodiment 1 of the present invention. The imaging device 10 is a digital video camera, a DVC digital camcorder, or the like. The imaging device 10 includes a lens 12, an imaging unit 14, an image signal processing unit 16, a display control unit 18, a display unit 20, an image processing unit 22, an interface unit 24, a magnetic tape 26, a system control 28, an operation unit 30, and a detection unit. 32.

  The lens 12 forms a subject image on the imaging surface of the image sensor of the CCD sensor or CMOS sensor of the imaging unit 14. The imaging unit 14 converts the subject from the lens 12 into an electrical signal by the imaging element. The image signal processing unit 16 includes an AGC and A / D conversion unit, controls the gain of the output electric signal of the imaging unit 14, and converts it into a digital signal.

  The display control unit 18 controls display on the display unit 20, and the display unit 20 displays image data from the display control unit 18 under the control of the display control unit 18.

  The image processing unit 22 includes an image compression / decompression circuit such as MPEG or JPEG, and performs processing such as compression / decompression and enlargement / reduction of image data.

  The interface unit 24 controls data write processing and data read processing on the magnetic tape 26. The magnetic tape 26 is a recording medium of the imaging device 10.

  The system control circuit 28 controls the entire imaging apparatus 10. The operation unit 30 is used to input various instructions to the system control circuit 28. The operation unit 30 includes a power switch, an operation shooting key, a playback switch, a stop switch, an image display key, an image advance switch, an image return switch, a search setting menu button, a recording format selection key, a search selection key, a search execution key, and the like. To do.

  The detector 32 compresses video information reproduced from the magnetic tape 26 (HD video format or SD video format), video format (NTSC format or PAL format), frame rate (60i, 50i, 30F, 25F or 24F). , And the aspect ratio (16: 9 or 4: 3).

  Here, the operation of the imaging apparatus 10 by the operation unit 30 will be described. The power switch turns on / off the power of the imaging apparatus 10. In operation shooting, the system control circuit 28 is instructed to shoot a moving image of a subject image. The playback switch instructs the system control circuit 28 to play a moving image, and the stop switch instructs the system control circuit 28 to stop playback. The image display key instructs the system control circuit 28 to display a thumbnail image of a moving image. The image advance switch instructs the system control circuit 28 to display the next thumbnail image. The image return switch instructs the system control circuit 28 to display the previous thumbnail image. The operations from the search setting menu button to the search execution key will be described later.

  Next, the cueing operation will be described. FIG. 2 is a flowchart of the cueing operation of this embodiment. FIG. 3 is an example of a search setting menu screen in the present embodiment.

  Here, it is assumed that the video data of the subject image is recorded on the magnetic tape 26 and then the video data of the HD video format and 60i is to be reproduced. When the user presses the search setting menu button, a search setting menu screen as shown in FIG. 3 is displayed (S10), and search conditions can be set for each recording format.

  When the recording format selection key is pressed, the item can be switched to any one of “compression method search”, “video method search”, “frame rate search”, and “aspect search”. If the search selection key is pressed while “compression method search” is selected, any of “OFF”, “ALL”, “HD” and “SD” can be checked. In FIG. 3, “HD” is checked. Similarly, “frame rate search” is selected with the recording format selection key, and “60i” is checked. That is, in the screen example shown in FIG. 3, video data having a compression method of HD video format and a frame rate of 60i is searched.

  If “OFF” is checked, it means that the search is not performed with a recording format in which “OFF” is entered. If “All” is checked, it means searching in all recording formats. When the search execution key is pressed while “HD” and “60i” are checked, the search for the HD video format and the narrowed video data of 60i is started and cueing is performed.

  When the user presses the search execution key after setting the search conditions, search and playback of video data matching the conditions is started. That is, it is determined whether or not the search execution key is pressed (S11). The user can change the search condition until the user presses the search execution key.

  When the search execution key is pressed (S10), the setting contents (A0, B0, C0, D0) of the search setting menu, that is, the search conditions are saved (S12). Here, A0 is a compression method, B0 is a video method, C0 is a frame rate, and D0 is an aspect ratio.

  After the setting contents of each of A0, B0, C0, and D0 are stored (S12), the magnetic tape 26 is run at a high speed for search (S13). Then, the image processing device 22 decompresses the video data reproduced from the magnetic tape 26, and the detection unit 32 detects the compression method (A1), the video method (B1), the frame rate (C1), and the aspect ratio (D1). Is detected (S14). Each element of the detected recording format of each reproduced video data is compared with the set search condition in order (S15 to S18). If all the elements match, that is, if A0 = A1, B0 = B1, C0 = C1 and D0 = D1 (S18), the process proceeds to normal reproduction (S19). If any of the conditions do not match (S15 to S18), the process returns to step S13 to repeat the high speed search.

  In this example, when video data having a compression method of HD video format and a frame rate of 60i is detected, the normal playback is started.

  Needless to say, when one of the recording formats is detected, it is compared with the search condition, and if it does not match, another recording format is not detected, and the process proceeds to step S13 and the next video data is detected. Obviously, you may play

  Whether or not the search conditions are met in the order of the compression method, the video method, the frame rate, and the aspect ratio has been examined, but the order is not limited. For example, the search may be performed in the order of video system, frame rate, aspect ratio, and compression system.

  Moreover, although the embodiment using the magnetic tape 26 has been described, a memory card, an SD card, an optical disk or the like may be used.

  Furthermore, although the compression method, the video method, the frame rate, and the aspect ratio are detected, the present invention is not limited to this. For example, image information for each frame (such as shooting date / time and shooting time) may be detected.

  Thus, according to the present embodiment, it is possible to cue to video data that matches the search condition of the recording format.

1 is a schematic configuration block diagram of an imaging apparatus according to Embodiment 1 of the present invention. It is a flowchart which performs the cueing which concerns on Example 1 of this invention. It is an image figure of the search setting menu screen concerning Example 1 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Imaging device 12 Lens part 14 Imaging part 16 Image signal processing part 18 Display control part 20 Display part 22 Image processing part 24 Interface part 26 Magnetic tape 28 System control circuit 30 Operation part 32 Detection part

Claims (3)

A playback device for playing back video information from a recording medium capable of recording a plurality of video information in different recording formats,
A specifying means for specifying a recording format as a search condition;
Read means for sequentially reading video information recorded on the recording medium from the recording medium;
A playback apparatus comprising: determination means for determining whether or not the video information read by the reading means matches the search condition.   The playback apparatus according to claim 1, wherein the plurality of recording formats include at least one of a compression method, a video signal method, a frame rate, and an aspect ratio.   The playback apparatus according to claim 1, further comprising playback means for playing back video information that matches the search condition based on a determination result of the determination means.

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