KR100266571B1 - Index function recording circuit and its method of vcr - Google Patents

Abstract

PURPOSE: A recording circuit useful for an index of a VCR(Video Cassette Recorder) is provided to record data including rewrite data, screen data and other write data by editing played video data. CONSTITUTION: A read amplifier(1) amplifies detected signals(V1) of a playback head(HD1) into a specific level. An equalizer(2) corrects distortion in phase and size from output(V2) of the read amplifier. An index data reader(3) detects ID(Identification) from output(V3) of the equalizer and saves the index data(V3) in a memory(5). A read demodulator(4) corrects error and demodulates the output of the equalizer. An index data output unit(7) saves rewrite data(V5) in the memory by rewriting the output(V0) of the read demodulator. An adder(9) adds the output(ID) of an ID output unit(8) to output(V6) of the memory. An equalizer(11) corrects distortion in phase and size to correct output(V8) of a write data processor(10) for modulating output(V7) of the adder. A write amplifier(12) records amplified signals(V10) on the initial part of a tape through a head(HD2). A system controller(6) controls the entire action of a system. Therefore, the index data are recorded simply.

Description

VRF Index Function Recording Circuit and Its Method

1 is a block diagram of a VRF index function recording circuit of the present invention.

2 is an exemplary view showing an index track in FIG.

3 is a signal flow diagram of index data recording according to the present invention.

* Explanation of symbols for the main parts of the drawings

1: regenerative amplifier 2, 11: equalizer

3: indes information reading section 4: reproduction demodulation section

5: memory 6: system control unit

7: Index data generator 8: Recognition name generator

9: adder 10: record data processing unit

12: Recorder HD ₁ , HD ₂ : Head

M ₁ : Capstan Motor

TECHNICAL FIELD The present invention relates to the recording of an BT function index, and more particularly, to an BC function indexing circuit and method for recording information on edit information, screen information, and other recording data as the image data is reproduced and edited.

According to the present invention, when the reproduction signal is reproduced and edited, the tape index function stores the index information in the memory at the beginning of the reproduction and performs the editing, and additionally records the modified data for the edit information and the screen information as the existing index is added. The invention of the recording circuit and the method thereof will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an index function recording circuit of the VR of the present invention. As shown therein, a reproduction amplifier 1 which amplifies a detection signal V ₁ of a reproduction head HD ₁ by a predetermined level, and this reproduction amplifier The equalizer _{2 which} receives the output V ₂ of (1) and compensates for the distortion of phase and magnitude, and detects the recognition name ID at the output V ₃ of the equalizer 2, thereby providing index information. An index information reading section (3) for storing (V ₃ ) in the memory (5), a reproduction demodulation section (4) for receiving an output (V ₃ ) of the equalizer (2), correcting errors, and demodulating the data; And an index data generator 7 for generating and storing data V ₅ of the edited contents in the memory 5 as the output V ₀ of the reproduction demodulation unit 4 is edited and recorded. An adder 9 for adding the output ID of the recognition name generator 8 to the output V ₆ of (5), and recording data for filtering and modulating the output V ₇ of the adder 9; The equalizer 11 corrects the distortion of phase and magnitude by compensating the output V ₈ of the processing unit 10, and the capstan motor M ₁ by amplifying the output V ₉ of the equalizer 11 by a constant level. A recording amplifier 12 for recording the amplified signal V ₁₀ through the head HD ₂ in the initial portion of the tape rewound by the < RTI ID = 0.0 _> ), < / RTI > The operation and effects of the present invention configured as described above will be described in detail with reference to an exemplary view showing a second-degree index track and a signal flow diagram in a third-degree index data recording.

When the playback operation is performed to edit the program, the system controller 6 rotates the capstan motor M ₁ in reverse to return the tape to the initial playback state, and then transfers the tape at a constant speed.

At this time, the reproduction head HD ₁ detects the recording signal V ₁ of the tape conveyed by the capstan motor M ₁ , and the detection signal V ₁ is amplified and amplified by the predetermined level in the reproduction amplifier 1. The signal V ₂ is output after the distortion of the phase and magnitude is compensated for through the equalizer 2.

Accordingly, when the index information reading unit 3 detects the recognition name signal S. ID (E. ID) as the equalizer 2 outputs a signal V ₃ that compensates for distortion, the edit information, The index information V ₄ according to the screen information and the recorded data is read and stored in the memory 5 which is a RAM. As shown in FIG. 2, an index start recognition signal ( Data recorded between the S. ID) and the index end recognition signal (E.ID).

Then, the image data from the time when the index information reading unit 3 finishes reading the index information at the output V ₃ of the equalizer 2 is filtered by the reproduction demodulation unit 4 and then demodulated and thus the original image. After editing the reproduced image, the edited image data Vi is modulated by the recording data processing unit 10, and then the distortion of the data is compensated through the equalizer 11, and the compensated signal V ₉ is compensated. After a predetermined level of amplification in the recording amplifier 12, it is recorded on the tape by the recording head HD ₂ .

At this time, if the edit is completed and there is a correction part in the edited content, the index data generator 7 under the control of the system controller 6 stores the index information V ₅ as the user writes the edited content data. The data of the edited part of the saved data is modified.

In addition, when editing is completed, the system control unit 6 controls the capstan motor M ₁ to rewind the tape, and at the beginning of the index track having a predetermined area as shown in FIG. ₂ ).

At this time, when the memory 5 under the control of the system controller 6 outputs the stored data V ₆ , the adder 9 outputs the output ID of the recognition name generator 8 to the data V ₆ . The data is added to the recording data processing unit 10 and added to the recording data processing unit 10.

According to the read data processor 10 modulating the index information V ₇ , the equalizer 11 receiving the modulated signal V ₈ compensates for the distortion of phase and magnitude, and compensates for the compensated signal V _9. ) Is amplified by a predetermined level in the recording amplifier 12 and then recorded by the head HD ₂ as shown in FIG.

Referring to FIG. 3, the above-described operation of the present invention will be described. As the tape is played back and edited, the system controller 6 secures an index track in the initial portion of the tape as shown in FIG. The edits are then recorded on the track.

At this time, when the edited content creates data, the output V ₅ of the index data generator 7 is stored in the memory ₅ under the control of the system controller 6, and then the recognition name generator 8 is added by the adder 9. ) Is added and recorded in the secured index track as shown in FIG.

On the other hand, when the tape on which the editing is performed is reproduced and edited, the data of the index track is detected by the index information reading unit 3 and stored in the memory 5, and the image is reproduced and stored after the index track as the image is reproduced. .

At this time, if the edit is completed and there is a correction part, the output V ₅ of the index generator 7 is input to the memory ₅ as the edit contents are written to restore only the correction part.

Accordingly, when the system control unit 6 determines the correction of the edited content, the capstan motor M ₁ is controlled to rewind the tape, and the stored data of the memory 5 is recorded in the secured index track.

As described in detail above, the present invention simplifies index information recording by updating the correction data after rewinding the tape to the initial stage of the tape when program editing is performed, and if there is a correction part, saving time for finding an index track for index information recording. It can work.

Claims (2)

A reproduction amplifier 1 which amplifies a predetermined level as the head HD ₁ detects the recording signal V ₁ from the tape conveyed by the capstan motor M ₁ , and an output V ₂ of the reproduction amplifier 1. Equalizer 2 for compensating (), an index information reader (3) for detecting index information (V ₄ ) at the output (V ₃ ) of the equalizer (2) and storing it in the memory (3), and A reproduction demodulation unit 4 for demodulating the output V ₃ of the equalizer 2 and outputting the original video signal V ₆ , and the index data V ₅ according to the creation of the data of the correction part after the editing is completed. Data generator 7 for outputting the data to the memory 3 and an adder 9 for adding the output ID of the recognition name generator 8 to the stored data V ₆ of the memory 3. And a recording data processing unit 10 for modulating the output V ₇ or digital input signal Vi of this adder 9 and an equalizer for compensating the output V ₈ of this recording data processing unit 10. 11, and so on A recording amplifier 12 which amplifies the output V ₉ of the firearm 11 by a predetermined level and records it on a tape through the recording head HD ₂ , and controls the operation of the system to secure an initial index track and to finish editing. And a system control unit (6) for controlling the driving of the capstan motor (M ₁ ) for recording the index information. A first step of detecting and storing data of an index track in which a predetermined area of a tape is secured at the beginning of editing, a second step of reproducing and editing image data after storing index data in a first step, and in a second step When editing is finished, the third step of updating the correction portion of the stored data, and when the update of the stored data is determined in the third step, rewinding the tape to place the recording head HD ₂ on the index track and And a fourth step of recording the update data.