JP2810145B2 - Recording and playback device - Google Patents

Description

The present invention relates to a recording / reproducing apparatus.

2. Description of the Related Art For example, when editing a program recorded on a material tape at a broadcasting station or a production site, the contents of the material tape are first dubbed onto a work tape while adding a time code (hereinafter TC). Next, the necessary parts are exposed from this work tape and dubbed to another tape together with the TC. This is what is called off-line editing. Based on the off-line master tape created here, main editing called on-line editing is performed to complete the master tape.

In such work, offline editing must be performed reliably in order to efficiently perform editing with higher completeness. Therefore, offline editing is usually performed several times while reworking, and the work of reviewing the offline tape that has been made once is repeated.

[Problems to be Solved by the Invention] However, in order to grasp the contents of an off-line tape, it is necessary to reproduce from the beginning to the end of the tape. Had the disadvantage of taking a long time.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a recording / reproducing apparatus capable of grasping the contents of a recording medium in a short time.

[Means for Solving the Problems] To achieve the above object, the present invention provides a reproducing means for reproducing a video signal and a time code from a first recording medium on which video signals and a time code of a plurality of scenes are recorded. When,
A recording unit that records a video signal reproduced by the reproduction unit on a second recording medium; a detection unit that detects discontinuity of a time code reproduced by the reproduction unit; Extracting a still image signal for at least one screen of each scene from the video signal reproduced by the reproducing means, and detecting the extracted still image signal for one screen in the second recording medium; Control means for setting the recording unit in a recording mode in accordance with an output of the means.

[Operation] According to the present invention, discontinuity of the time code is detected, a still image is extracted one screen at a time from each scene according to the detection output, and the recording unit is recorded according to the detection output of the discontinuity. The still image extracted as the mode is recorded.

Example An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an operation flowchart in the embodiment, and FIG. 3 is a diagram showing an example of recorded contents of a tape.

In offline editing, the necessary scenes are selected from the work tape and recorded on the offline master tape. At that time, the TC on the work tape is recorded as it is, so the time code is discontinuous between the scenes. The present invention utilizes this to send a tape that has been edited at a high speed from the start end, and detects a joint between scenes.

In FIG. 1, reference numeral 1 denotes a tape recording / reproducing unit which reproduces an offline master tape. Numeral 2 denotes a time code reader for reading a time code, and numeral 3 records an image signal and time code data on a magnetic disk. The tape recording / reproducing section 1 reads the time code from the offline master tape being reproduced, inputs the time code to the time code reader 2, and inputs the reproduced image signal of each frame to the magnetic disk recording section 3. A RAM 4 has a time counter (area), flags (areas) SW1, SW2, SW3 and SW4, memories (areas) M1 and M2, and a data time storage area. Reference numeral 5 denotes a CPU for controlling the tape recording / reproducing unit 1, magnetic disk recording unit 3, and RAM 4, and 6 denotes a ROM, which is a CP as shown in FIG.
Stores U control means.

When the edited offline master tape (recorded as shown in FIG. 3) mounted on the tape recording / reproducing unit 1 is rewound, and the index mode start button of the recording / reproducing unit 1 is pressed, the operation is started. Is reset (S1)
Then, SW1 to SW4 are reset (0) (S2), and the tape is caused to run normally (S3). Next, it is determined whether or not a TC signal is input (S4).
, The time counter is reset in S5, and the same TC signal is input to the memory M1 in S6. Here, since both SW1 and SW4 are 0 (S7, S8), the process proceeds to S9, where the recording unit 3 enters the recording (Rec) mode on the magnetic disk, and the contents of the memories M1, M2 and the data from the tape recording / reproducing unit 1 The reproduced video signal for one frame is stored in the disk recording unit 3.
(S10, S11). That is, the first TC and the still image of the scene A in FIG. 3 are recorded on the disc. Thereafter, SW2 and SW3 are reset in S12, the tape runs at high speed in S13, the data in the memory M1 is input to the memory M2 in S14, SW4 is set to 1 in S15, and the process returns to S4 to wait for the next TC.

When the next TC enters, the corresponding TC is input to the memory M1 in S6 through S5, and since SW1 is 0 and SW4 is 1 this time (S7, S8 → S1
6) In S16, the contents of the memories M1 and M2 are compared. In the same scene A, TCs are linked, so the difference is one frame. Proceed to S14, input the data of the memory M1 to the memory M2, return to S4 via S15, and wait for the next TC. become. The above is repeated as long as the TC is continuous.

Next, the operation when the tape running normally reaches the joint between scenes A and B will be described.

When the tape running normally enters scene B, the TC becomes discontinuous, so the difference between memories A and B is no longer one frame, and the process proceeds to S17 (S4, S5, S6, S7, S8, S16 → S17). . here
Since both SW2 and SW3 are 0 (S17, S18), the tape is made to run backward in S19, SW2 is set to 1, and the process returns to SW4 to continue reading TC. Then, when the tape returns to the connecting portion of scenes A and B again (S4, S5, S6, S7, S8, S16, S17), the SW2 is 1 in S18, and the tape is made to run normally in S21, and the SW3 is switched in S22. As 1, the process returns to S4. Thus, normal driving state scenes A and B
(S4, S5, S6, S7, S8, S16, S17 → S
9) At S9, the magnetic disk recording unit is set to the Rec mode, and the still image of the scene B. The last TC of scene A and the first TC of scene B are recorded on the disc (S10, S11). And in S12
SW2 and SW3 return to 0, and the tape runs at high speed again.

Next, a description will be given of a case where there is a blank in the middle, that is, a portion which enters the blank portion from the scene B and a portion which enters the scene C from the blank portion in FIG.

While the tape is running at high speed, if there is no more TC in the blank after the last TC of scene B has been captured, the S4 goes to S23, S2.
After S4, it is determined in S25 whether the time counter value is equal to or more than 1/30 seconds (S). Since the tape is running at high speed, the time counter value
Since 1/30 _S is exceeded without a TC signal, set SW1 to 1 in S26.
Then, no-signal data is input to the memory M1 (S27), and as described in the operation of the connection portion between scenes A and B,
After the tape runs backward, normal running is performed, a blank still image and the last TC of scene B are recorded on the disk, the tape is fed at high speed, and the process returns to S4 (S17, S18, S19, S20, S4, S4).
5, S6, S7, S8, S16, S17, S18, S21, S22, S4, S5, S6, S7, S8, S16,
S17, S9, S10, S11, S12, S13, S14, S15 → S4).

Since SW1 is 1 during the blank, nothing happens until the next TC enters regardless of the time counter value (S4, S4
23, S24 → S4) When entering the scene C and entering the first TC, SW1 is 1 (S4, S5, S6, S7 → S28), so SW1 is set to 0 in S28, then proceed to S17, reverse running, normal After running, a still image of scene C and the first TC of scene C are recorded on the disc.

In this way, the still image of each scene and the first and last TCs are recorded on the disc, and the contents of the offline master tape can be grasped in a short time by playing the disc. Further, if the multi-screen display is performed at the time of reproduction and a plurality of screens are displayed on one screen, it becomes easier to understand. Output from a printer is also possible, and TC
The data can also be used as online editing data.

[Effects of the Invention] As described above, according to the present invention, a still image indicating the content of each scene recorded on the first recording medium can be automatically recorded on the second recording medium. Thus, the user can very easily check the contents of the first recording medium.

[Brief description of the drawings]

 FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is an operation flowchart of the embodiment, and FIG. 3 is a diagram showing an example of recorded contents of a tape.

Continuation of the front page (51) Int.Cl. ⁶ identification code FIG11B 27/02 C (56) Reference JP-A-62-34474 (JP, A) JP-A-58-150182 (JP, A) JP-A Sho 64-88977 (JP, A) JP-A-63-121189 (JP, A) JP-A-63-313382 (JP, A) JP-A-56-24886 (JP, A) (58) Fields investigated (Int. Cl. ^6, DB name) G11B 27/00 G11B 27/10

Claims (1)

(57) [Claims] 1. A reproducing means for reproducing a video signal and a time code from a first recording medium on which video signals of a plurality of scenes and a time code are recorded, and a second video signal reproduced by the reproducing means. A recording unit that records on a recording medium, a detecting unit that detects discontinuity of a time code reproduced by the reproducing unit, and a video signal reproduced by the reproducing unit according to an output of the detecting unit. Extracting a still image signal for at least one screen, and setting the recording unit in a recording mode in accordance with an output of the detecting means so as to record the extracted still image signal for one screen on the second recording medium. Recording / reproducing apparatus comprising: