JP2805298B2 - Image signal playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image signal reproducing apparatus for selecting and reproducing a desired image signal from a plurality of image signals recorded on a recording medium. [Related Art] Today, for example, in program production at a broadcasting station or the like, scenes are recorded at a plurality of locations on a plurality of tapes due to various conditions in production. for that reason,
Editing processing has become indispensable. Further, efficiency and efficiency have been demanded. In performing the editing, the following method is usually employed. At the beginning of each scene, an index number (for example, tape counter value) is given in advance.
This is to search for the desired scene at high speed based on the index number, and edit and record each time with another VTR. [Problems to be Solved by the Invention] However, in the conventional method, when a large number of scenes are desired or required, registration and recording of the index numbers of the scenes must be performed, and editing must be manually performed. There was a problem that there is. There is also a problem that the contents of a desired scene cannot be grasped from the index number. Further, there is a problem that it is necessary to perform an operation on the recording apparatus every time a desired scene is searched. The present invention has been made in view of the above-mentioned problems, and it is not necessary to manually register and record the index number of a desired scene, and it is possible to grasp the contents of a desired scene, It is an object of the present invention to provide an image signal reproducing apparatus capable of searching and reproducing an image signal of a scene. [Means for Solving the Problems] An image signal reproducing apparatus according to the present invention is an apparatus for reproducing a recording medium in which a large number of image signals are recorded together with a plurality of index signals, and an index from the large number of image signals. A plurality of image signals are reproduced in accordance with the reproduction of the signals, and each of the image signals is written to the memory as a reduced image, and an index symbol is automatically formed sequentially each time the index signal is reproduced. Forming means for forming an image to which an index signal is added as a character; selecting means for selecting a specific reduced image from the plurality of reduced images by manually inputting the index symbol; Search means for searching for and reproducing the corresponding image signal. [Operation] With the above configuration, a desired image signal can be easily searched and reproduced without manually registering or recording an index number. EXAMPLES Hereinafter, the present invention will be described using one example of the present invention. FIG. 1 is a block diagram of a VTR as one embodiment of the present invention. FIG. 2 is a diagram showing a state of the image information A to I before editing recorded on the magnetic tape 21.
E-A to I-I are index signals indicating the start position of each video signal VIDEO-A to I, and CUE-A 'to
I 'is an index signal indicating the end position of each video signal VIDEO-AI. Symbols A to I in the figure indicate scenes recorded at the beginning of each video signal VIDEO-A to I. FIG. 3 is a diagram in which still images are displayed on each of the nine divided screens. In FIG. 1, a video signal reproduced from a magnetic tape 21 as a recording medium by a reproducing head (not shown) is restored by a reproduction processing circuit 1 into a composite color television signal such as the NTSC system, for example. The John signal is supplied to the changeover switch 15 described later and to the low-pass filter 2. 2 is a low-pass filter (LPF) for removing unnecessary signals contained in the reproduced television signal, and 3 is an analog / digital converter for converting an analog reproduced television signal passed through the LPF 2 into a digital television signal. Converters (A / D), 4 are a horizontal simultaneous signal, a vertical synchronizing signal, a color
A sync separation circuit for separating three types of burst signals,
5 is a clock signal generator for multiplying the horizontal synchronizing signal and the color burst signal to generate a sampling clock of the A / D3 and a clock for a thinning process described later;
Reference numeral 6 denotes a frequency divider for dividing the frequency of the clock from the clock signal generator 5, and 7 denotes a digital television signal output from the A / D 3 when the digital television signal is displayed on the CRT screen of the external display device 33. In order to reduce the area to 1/9, in the frequency-divided clock from the frequency divider 6, one pixel is sampled every three pixels in the horizontal direction and one line is sampled every three lines in the vertical direction. A thinning-out processing circuit 8 is a memory circuit for storing an output from the thinning-out processing circuit 7, and 9 is a clock of the frequency divider 6 which receives a command signal from a system controller 16 to be described later and writes the data into the memory circuit 8. And an address control circuit that performs reading based on a clock from a reference clock generation circuit 10 described later, and synchronizes with the vertical synchronization signal separated by the synchronization separation circuit 4. And reset. Reference numeral 10 denotes a reference clock generation circuit for generating a reference clock, and reference numeral 11 denotes a character for generating character data such as literature and mathematics representing an index signal and a tape counter value corresponding to counter information read and output from a counter memory circuit 20 described later. A generator 12 is a superimpose circuit for multiplexing the character data output from the character generator 11 with the thinned television signal output from the memory circuit 8, and 13 is a superimpose circuit 12 Digital-to-analog converter (D / A) that converts digital television signals from analog to analog signals, 14 is D / A
Low-pass filter that removes unnecessary component signals generated during conversion
The filter (LPF) 15 switches between the output of the LPF 14 and the output of the reproduction processing circuit 1 to switch the external display device 33 or the external recording device.
This is a changeover switch for outputting to the VTR31. Reference numeral 16 denotes the address control circuit 9 and a servo amplifier 17 which will be described later, based on instructions from an ATF lock circuit 23, an envelope detection circuit 28 and an operation unit 32 which will be described later.
, Counter memory circuit 20, and index signal generation circuit 29
, And sends a control signal for recording to the external recording VTR 31 or divides the display screen displayed on the external display device 33 into nine parts, and divides each reduced screen television signal into nine parts. A system controller 17 for allocating to a screen receives a command from the system controller 16, and controls a motor in a motor system 18, which will be described later, in a mode such as fast-forward, reverse rotation, or reproduction, and a servo circuit 18
Reference numeral denotes a motor system including a capstan motor and a reel motor, the rotation of which is controlled by the servo circuit 17 and the transmission of an FG signal for speed control. 19 is a counter for measuring the running amount of the magnetic tape from the rotation cycle of the reel (not shown) and outputting the measured counter information, 20 is the counter
19 is a counter memory circuit that stores counter information at the time when the counter information measured by the counter 19 is input and the index detection signal output from the system controller 16 is input. Reference numeral 21 denotes a magnetic tape, 22 denotes a four-frequency pilot signal detection circuit for detecting four types of tracking pilot signals from the reproduced video signal, and 23 monitors the tracking pilot signal detected by the four-frequency detection circuit 22. An ATF lock circuit that detects a stable tracking state of a reproducing head (not shown) and generates a lock detection signal to the system controller 16 when tracking is stabilized. 24 index signal (CUE-A to I are f _1, CUE-A '
_ＩI ′ is a cuvette for recording / reproducing f ₂ ), 25 is a switch that conducts when recording an index signal, 26 is an index signal (f ₁ ,
An amplifier (AMP) for amplifying f ₂ ), a switch 27 for switching between recording (R) and reproducing (P) of the index signal, 28
Is an envelope detection circuit that detects the envelope of the amplified index signal and generates a signal when the value is equal to or higher than a reference level, and 29 is an index signal (f ₁ ,
f ₂ ) The index signal generator (OSC) that generates 30
Is an amplifier (AMP) for image width of the output of the index signal generating circuit 29, 31 is an external VTR for recording, 32 is an operation unit including an operation keyboard and the like, and 33 is an external display device. The operation of the present embodiment in the above configuration will be described with reference to FIGS. When performing automatic editing of the magnetic tape 21 on which nine types of image information from A to I are recorded as shown in FIG.
First, press the operation key "search" (not shown) on the operation unit 32,
When a "search" command is input to the system controller 16, a "search" command signal is output from the system controller 16 to the servo amplifier 17, and the servo amplifier 17 drives the motor system 18 to perform a search. The operation is performed.
At this time, the counter 19 has been reset in advance, and "000"
Will start from. During the search operation, the cue track 21t provided at the edge of the magnetic tape 21 is moved to the cue head 2
4 is traced, and the reproduced signal reproduced by the cue head 24 is amplified by the AMP 26 and input to the envelope detection circuit 28 via the switch 27 connected to the P side in the figure. When the cue head 24 reproduces the index signal CUE-A, a fluctuation in the envelope occurs in the reproduction signal, and the envelope detection circuit 28 detects the fluctuation in the envelope, generates an index detection signal, and generates the index detection signal.・ Supply to the controller 16. The system controller 16, which has received the index detection signal from the envelope detection circuit 28, gives a command signal of "reproduction" to the servo amplifier to switch the motor system 18 to the reproduction operation. Then, a reproducing unit (not shown) reproduces the video signal VIDEO-A recorded on the video track 21v on the magnetic tape by a reproducing head (not shown), and reproduces the video signal VIDEO-A.
The tracking pilot signal superimposed on A is detected by the four-frequency detection circuit 22, the ATF clock circuit 23 detects that tracking is stabilized, and the ATF lock signal is output. Processing of the television signal is also started. That is, the television signal is converted into a digital television signal by the A / D conversion circuit 3 via the LPF 2. And the thinning processing circuit 7
The television signal is decimated into 1/3 signals in both the vertical and horizontal directions, converted into a reduced television signal, and then written into the memory 8 once. Next, the television signal read from the memory 8 is supplied to a superimpose circuit 12 by a character generator.
The index symbol generated from 11 and the signal of the tape counter value are multiplexed and restored to an analog television signal by the D / A 13. Then, it is supplied to the changeover switch 15 connected to the A side via the LPF 14, and the reduced still image is displayed on the external display device 33. At this time, the system controller 16 inputs the data corresponding to "A" of the order symbols A to I of the index into the memory 20, and reads the track for one field reproduced in a state where the tape running is stable. The counter value at the time of tracing is also stored in the memory 20 from the counter 19. As described above, when the reduced television signal of the video signal VIDEO-A is recorded in the memory 8 and the still image small image is reproduced on the external display device 33, the system controller 16 switches to the search and the search operation is performed again. , And picks up the next index signal CUE-B, C. By repeating the above-described operation, nine types of reduced still image images are displayed on the external display device 33 as shown in FIG. Each image is multiplexed with an index symbol and a tape counter value. (Example: A-001). Further, in this embodiment, even if ten or more types of information are searched for on a nine-division screen, only the first nine divisions are displayed. In the description so far, the index signal CUE-A
This is an explanation of the operation at the time of reproduction when a magnetic tape on which .about.I, CUE-A 'to I' are recorded is used. Next, a case where the index signal is not recorded on the magnetic tape will be described. Desired video signal VIDEO-A to I on magnetic tape
Is detected by fast-forward, rewind, playback, etc., the magnetic tape is played back, and while the tape is running, the cue track of the portion where the cue track of each video signal is desired to be cue-A to I becomes an index signal f _1. a cue track 21t in CUE-A'~I 'become the index signal f ₂ the beginning of the desired part of the same manner as described above the magnetic tape be recorded is performed in the portion of the end. At the time of recording the index signal, the operation unit 32 transmits the instruction to the index signal recording instruction to the system controller 16, and the system controller 16 sends a command signal for operating the index signal generation circuit 29. The index signal generating circuit 29 is provided with the system controller 16.
The index signals f ₁ and f ₂ are generated in accordance with the command signal from the AMP 30, and the index signals f ₁ and f ₂ are output to the AMP 30. The switch 25 is turned on by the system controller 16 in response to an index signal recording instruction.
The signal amplified by 0 is applied to the cue head 24 via the switch 25. Next, the automatic editing operation will be described with reference to FIGS. FIG. 4 shows an image signal output device of the present invention and an external VTR 3 for recording.
1 is an operation timing chart, and FIG. 5 is a diagram showing a state after automatic editing. First, from the divided display on the screen of the external display device 31 shown in FIG. 3, a desired scene and its order are selected.
The editing order is programmed by the operation unit 32 (for example, C →
B → H) Specify. The program order is stored in the memory 20, and the operation is performed based on the program order. When the automatic editing operation is instructed by the operation unit 32 after the input of the program is completed, the system controller 16 transmits the current counter information counted by the counter 19 and the video signal VIDEO specified first in the program.
-C is compared with the counter information, and a search operation instruction is given to the servo amplifier 17 until the two pieces of counter information match, thereby operating the servo system 18. At the same time, a recording control signal is supplied from the system controller 16 to the external recording VTR, and the external recording VTR enters a recording standby (pause) state. During the automatic editing, the changeover switch 15 is connected to the B side by the system controller 16. When the counter information of the video signal VIDEO-C stored in the counter memory circuit 20 matches the counter information of the counter 19, the system controller 16
Supplies an instruction for a reproducing operation to the servo amplifier 17 and supplies a control signal for starting a recording operation to the external recording VTR. Then, at the same time when the reproduction of the video signal VIDEO-C is started, the recording of the television signal based on the reproduced video signal VIDEO-C is started in the external recording VTR. When the cue head 24 reproduces the index signal CUE-C 'recorded at the end, the system controller 16 switches the operation to "search", and at the same time, the external
The operation of the VTR is switched to “pause” again, and the next video signal V
This state continues until the count value of IDEO-B is reached. Then, the video signal VIDEO-
When the H index signal CUE-H 'is reproduced, the system controller 16 generates a control signal indicating that the automatic editing / reproduction operation has been completed, supplies the control signal to the external recording VTR 31, and performs the recording operation of the external recording VTR 31. To end. FIG. 5 shows each video signal C, B,
It is a figure showing the state of H. As described above, in the embodiment of the present invention, the editing of the tape in the VTR has been described as an example. However, the present invention is not limited to the above example, and other recording or reproducing devices (for example,
It can be applied to editing in a video disk device or the like. [Effects] As described above using the embodiments, according to the present invention, a desired image signal can be easily searched and reproduced without manually registering or recording an index number, and Also, it is easy to grasp the contents of the recording medium.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a VTR as one embodiment of the present invention,
FIG. 2 is a diagram showing a state of image information recorded on a magnetic tape before editing, FIG. 3 is a diagram showing a state of divided display on an external display device, and FIG. FIG. 5 is a timing chart showing operation timings of the apparatus and the external recording VTR, and FIG. 5 is a diagram showing a state of image information recorded on a magnetic tape after automatic editing. 7 Thinning-out processing circuit 12 Superimpose circuit 16 System controller 24 Queue head 29 Index signal generating circuit 31 External VTR 32 for recording Operation unit

Continuation of front page    (72) Inventor Hiroo Edabo               770 Shimonoge, Takatsu-ku, Kawasaki-shi Canon               Tamagawa Works Co., Ltd. (72) Inventor Tadayoshi Nakayama               770 Shimonoge, Takatsu-ku, Kawasaki-shi Canon               Tamagawa Works Co., Ltd. (72) Inventor Toshiyuki Masui               770 Shimonoge, Takatsu-ku, Kawasaki-shi Canon               Tamagawa Works Co., Ltd.                (56) References JP-A-61-161084 (JP, A)                 JP-A-56-24886 (JP, A)                 JP-A-63-2186 (JP, A)

Claims (1)

(57) [Claims] An apparatus for reproducing a recording medium on which a large number of image signals are recorded together with a plurality of index signals, wherein the plurality of image signals are reproduced from the plurality of image signals in accordance with the reproduction of the index signals, and each of the reproduced image signals is a reduced image. By writing to a memory and automatically forming an index signal in sequence every time the index signal is reproduced,
Forming means for forming an image in which the index signal is added as a character to a plurality of reduced images; selecting means for selecting a specific reduced image from the plurality of reduced images by manually inputting the index symbol; An image signal reproducing apparatus comprising: a search unit configured to search and reproduce an image signal corresponding to the selected reduced image.