KR0178719B1 - Apparatus for controlling channel recording of digital vcr - Google Patents

Abstract

In the present invention, channel control for rearranging data to be recorded such as video and audio data, error correction code, etc. in the form of a digital VCR in a form suitable for the actual data recording format and controlling the system operation until recording by the head is performed. In particular, the present invention relates to a recording channel control apparatus for a digital VCR in which the channel control process is unified with the channel control unit to stabilize the operation of the signal processing system, and the internal structure of the channel control unit is simplified using ROM. The apparatus of the present invention generates a control signal for controlling the head switch signal and other functional operations in the channel controller to perform signal processing collectively. In addition, the process of a system consisting of several sub-blocks that perform different functions using the ROM is simplified, and the use of the ROM can cope with changes in the recording pattern.

Description

Digital VCR recording channel controller

1 is a block diagram showing a recording channel control apparatus of a conventional digital VCR.

2 is a view for explaining a control signal flow for channel control of FIG.

3 is a block diagram showing a recording channel control apparatus for a digital VCR according to the present invention.

4 is a detailed view showing a channel control unit of FIG.

* Explanation of symbols for main parts of the drawings

10: image data processing unit 50: channel control unit

51: head switching signal generator 52: ROM drive unit

53: control information ROM 54: control signal generator

80: recording amplifier 90: servo control unit

The present invention relates to a recording channel control apparatus of a digital VCR, and more particularly, to stabilize the operation of the signal processing system by unifying the whole process of channel control to the channel control unit, and using the ROM (ROM) to configure the internal structure of the channel control unit. The present invention relates to a recording channel control apparatus for a digital VCR that simplifies the operation.

In general, in digital VCR, channel control rearranges data to be recorded such as video and audio data and error correction code into a form suitable for the actual tape recording format, and controls the system operation until recording by the head. Means the process of. More specifically, the same data processing process is performed by mixing audio data and video data inputted as separate inputs and processing in a separate process onto one signal processing path so as to match the data array type to be finally recorded on the tape. Take it through. In addition, by making a control signal which is a reference for the operation of the recording amplifier, which actually records the processed data on the tape, accurate recording is performed. The conventional channel control apparatus of such a digital VCR is shown in FIG.

FIG. 1 is a block diagram showing a channel control apparatus of a conventional digital VCR. Control signal lines between respective block blocks are indicated by dotted arrows, and data lines are indicated by thick solid arrows.

In FIG. 1, the image data processor 10 processes image data to be recorded, and transmits the processed image data to the channel controller 50 according to the control signal of the channel controller 50. The image data processing unit 10 also generates a reset signal in units of fields or frames and transmits the reset signal to the main counter 20. Here, the case of the frame reset signal S12 is determined. The main counter 20 is based on the head switching signal S92 applied from the servo control unit 90 and the frame reset signal S12 applied from the image data processing unit 10, and the time required for the video and audio data processing. The delayed head switching signal S25 generated by delaying is supplied to the channel controller 50. Detailed description thereof will be described later with reference to FIG. 2.

The channel controller 50 operates by a function control signal applied from the system controller 40, and the video and audio data, various ambles, ID data, and the like are based on the delay head switching signal applied from the main counter 20. The video and audio data processing units 10 and 30 are controlled so that they can be arranged in the form to be recorded on the tape. The channel controller 50 arranges the video data, the audio data, the various ambles, and the ID data processed by the video and audio data processing units 10 and 30 in a form to be recorded on a tape. To send. The data mixing internal code adder 60 adds the mixed and internal codes to the channel modulator 70 according to the control signal applied together with the data arranged in accordance with the tape recording format applied from the channel controller 50. . The channel modulator 70 modulates the output data of the data mixing inner code adder 60 to be recorded on the tape, and transmits the data to the recording amplifier 80. Here, the channel controller 50 applies the control signals S58 and S59 to the recording amplifier 80 and the servo controller 90 to process the data D78 input to the recording amplifier 80. The control signal S58 input to the recording amplifier 80 operates only during the time when data is recorded in one track on the tape. Then, the control signal S59 transmitted from the channel controller 50 to the servo controller 90 controls the operation of the flying erase head when performing the normal proxy or editing function. In particular, all blocks except for the recording amplifier 80 and the servo controller 90 are collectively referred to as a signal processing system.

FIG. 2 shows the flow of main signals for channel control with reference to FIG. The servo controller 90 generates the head switch signals S92 and S98 in a state where the operation of the head is stabilized, and transmits them to the main counter 20 and the recording amplifier 80. The main counter 20 measures the time required for signal processing from the head switch signal S92 input from the servo controller 90 and the frame reset signal S12 input from the image data processing unit 10 (see FIG. 1). The delayed head switch signal S25 generated in consideration is output to the channel controller 50. The channel controller 50 controls the video data processor (see FIG. 1) and the audio data processor (see FIG. 1) based on the delay head change signal S25 to form a tape recording format. The write control signal S58 is sent to the write amplifier 80.

However, in the conventional recording channel control system as described above, the servo control unit 90 generates the head switching signal S98 and the channel control unit 50 generates the recording control signal S58, respectively, and applies it to the recording amplifier 80. Because of the signal processing structure, the operation of the signal processing system is unstable. In addition, the channel controller 50 is a part for generating a control signal of the image data processing unit 10, a part for generating a control signal of the audio data processing unit 30, a part for making a control signal for the internal call unit, and a recording amplifier control signal. Since it is divided into a number of sub-blocks, such as a part making a, the process is complicated and there is a problem that can not adaptively respond to changes in the recording pattern.

Accordingly, an object of the present invention is to implement a new channel control method for controlling a channel by unifying a signal processing system centered on a channel control unit in a digital VCR requiring high recording density and processing of high frequency signals in view of the foregoing. To provide a recording channel control apparatus for a digital VCR which stabilizes the operation of a signal processing system.

The recording channel control apparatus of the digital VCR according to the present invention for achieving the above object is a recording channel control apparatus for controlling the operation until the recording is arranged in a tape recording format by mixing the video and audio data in the digital VCR In the present invention, an image data processor for processing and outputting image data to be recorded, generating a reset signal in a field or frame unit, and prestored control information necessary for channel control, and a reset signal generated in the image data processor A channel control unit for generating a head switching signal based on the control unit, and generating a data array, an internal call unit, and each control signal indicating a section to be operated from the previously stored control information corresponding to the reset signal and the head switching signal; Servo control unit for performing the operation of the servo control according to the head switching signal generated from the channel control unit, and the channel control While the head switching signal and in response to a control signal indicative of a period to operate the operation section generated only in a recording amplifier which performs an operation of data recorded on the tape.

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

3 is a block diagram showing a recording channel control apparatus for a digital VCR according to an embodiment of the present invention, and FIG. 2 is different from the control signal flow for the conventional channel control. That is, unlike FIG. 2, which controls the channel based on the servo controller 90, the present invention controls the recording amplifier 80 and the servo controller 90 based on the channel controller 50. FIG. .

In FIG. 3, the channel controller 50 collectively controls the recording amplifier 80 for amplifying data for recording on the tape and the servo controller 90 for controlling the operation of the head. That is, the channel control unit 50 generates the recording control signal T58 and transmits it to the recording amplifier 80, and generates the head switching signal T589 and transmits it to the recording amplifier 80 and the servo controller 90. The recording amplifier 80 records data according to the recording control signal T58 and the head switching signal T589 transmitted according to the head switching timing, and the servo controller 90 controls the head according to the input head switching signal T589. Switch to. Detailed description thereof will be described later with reference to FIG. 4.

4 illustrates the signal processing system of FIG. 3 in detail. The channel controller 50 includes a head switch signal generator 51 for generating a head switch signal, a ROM driver 52 for generating a drive pulse for driving the ROM to read various control information, and video / audio data control information. And a control information ROM 53 which stores various control information, and a control signal generator 54 for generating a control signal in accordance with the control information of the control information ROM 503.

In FIG. 4, the image data processing unit 10 transmits the frame reset signal to the head switching signal generation unit 51 of the channel control unit 50. The head switch signal generator 51 of the channel controller 50 generates the head switch signal T589 based on the frame reset signal input instead of the servo controller 90 to generate the servo controller 90 and the recording amplifier 80. To each transfer. The head switch signal T589 is also applied to the ROM driver 52 of the channel controller 50. The ROM driver 52 generates a pulse for driving the control information ROM 53 according to the head switch signal T589 generated by the head switch signal generator 51. The control information ROM 53 driven by the drive pulses sends various control information for controlling the respective functional blocks of the signal processing system to the control signal generator 54. The control information ROM 53 stores control information corresponding to one track in advance, and reads out the control information according to a driving pulse generated from the ROM driver 52 and outputs the control information to the control signal generator 54. In this case, since the control information ROM 53 uses a ROM medium, it is possible to adaptively cope with the change of the recording pattern only by changing the storage information. The driving pulse generated by the ROM driver 52 serves as an address for reading the control information stored in the control information ROM 53.

The control signal generator 54 generates the control signal T58 according to the control information read out from the control information ROM 53, thereby generating the video and audio data processing units 10 and 30, the data mixing internal code adding unit 60, The control signal is transmitted to the channel modulator 70 and the recording amplifier 80. At this time, the control signal applied to the video and audio data processing units 10 and 30 controls the process of reading data from the storage device. Further, the control signal sent to the data mixing section controls the operation of arranging the data in the form of tape recording. The control signal sent to the internal call adder adds the internal call only to the video and audio data, the external call, and the ID data that are the addition targets of the internal call. In addition, a control signal sent to the channel modulator 70 and the recording amplifier 80 indicates an operation section to be operated.

As described above, the recording channel control apparatus of the digital VCR according to the present invention generates the control signal and the head switching signal for controlling the operation of each functional block in the channel control unit, thereby consistently processing the flow of the channel control, Stabilize the operation of the signal processing system. When the operation of the signal processing system is stabilized, functions such as high-speed and high-density data input and recording and reproducing are efficiently and stably performed. In addition, the present recording channel control apparatus has the effect of simplifying the processing process by using a ROM instead of a complicated logic circuit, and changing the control information recorded in the ROM to use when recording patterns are recorded on different tapes.

Claims (3)

A recording channel control apparatus for controlling the operation of a digital VCR in which a video and audio data are mixed and arranged in a tape recording format until recording. The video data to be recorded is processed and reset in field or frame units. Image data processing unit for generating a signal; Prestores control information necessary for channel control, generates a head switching signal based on the reset signal generated by the image data processing unit, and arranges the data from the previously stored control information corresponding to the reset signal and the head switching signal. A channel controller for generating each control signal indicative of a call section and a section to be operated; A servo controller which performs an operation of servo control according to a head change signal generated by the channel controller; And a recording amplifier configured to perform data recording on the tape only during the operation section in accordance with the head switch signal generated by the channel controller and a control signal indicating a section to be operated. The head switch signal generator of claim 1, wherein the channel controller generates a head switch signal based on a reset signal generated by the image data processor, and outputs the generated head switch signal to the servo controller and a recording amplifier. ; A control information ROM which prestores control information corresponding to one track and outputs control information stored at a position indicated by an input address; A ROM driver which receives the reset signal and the head change signal and generates an address for reading the control information of the control information ROM; And a control signal generator for generating a recording control signal corresponding to the control information read out from the control information ROM. 3. The control block according to claim 2, wherein the control information ROM processes video and audio data for each data, and mixes and combines them into a tape recording format by adding internal codes, modulating the data, and recording the data through the recording amplifier. And a control information corresponding to a control signal required for storing the digital VCR.