KR100261906B1 - Method and apparatus for reproducing multi-channel simultaneous recording - Google Patents

Abstract

PURPOSE: An apparatus for reproducing a multichannel simultaneous recording is provided to time-demultiplex inputted information when the inputted information is incapable of being recorded by being transmitted to one channel, caused by transmission speed increases of the information, and to record the time-demultiplexed information by transmitting the information to many channels. Therefore, recording density of each channel is differentiated to resolve channel number increases. CONSTITUTION: A channel modulator(40) converts input data into a recording reproduction signal. A time-demultiplexer(50) stores output data of the channel modulator(40) as data having different capacities in two memories(51,52) by a memory select signal, and reads out a clock corresponding to the stored data amounts. Recording amplifiers amplify the data read in the memories(51,52), and record the amplified data in a tape(39) composed of heads(35-38). The time-demultiplexer(50) composed of the two memories(51,52) differentiates recording information amounts of the memories(51,52) when the output data of the channel modulator(40) are recorded. The time-demultiplexer(50) outputs the data recorded in the memories(51,52) to the recording amplifiers by being read in different frequencies.

Description

Multi-channel simultaneous recording playback method and device

The present invention relates to a multichannel simultaneous recording and reproducing method and apparatus for efficiently using a recording density when the maximum recording density of each channel is different.

Digital broadcasting, which was staying in the beginning stage, is rapidly changing and developing, and it is imminent in the commercialization stage. As a result, it is required to develop a device capable of recording digital broadcasting signals in the recording / reproducing apparatus. Is being proposed.

D-VHS has parallelism with S-VHS standard channel which is analog VCR, and the azimuth angle of head adopted by D-VHS is 30 °. Considering the common use with.

In this case, recording of Hi-Fi signal with very low recording density and digital information with very high recording density should be recorded on the same channel. It is very difficult to secure the recording performance, and in particular, it is difficult to secure a magnetic head capable of recording broadband. .

In other words, if it is suitable for Hi-Fi, which is low density recording, it is unsuitable for recording of digital information, which is high density recording. On the contrary, if it is suitable for digital information, which is high density recording, it becomes unsuitable for Hi-Fi, which is low density recording. It is a fact that both digital and digital concessions are set in a condition that can secure the best performance.

1 is a configuration diagram of a recording and reproducing apparatus proposed by the D-VHS standard.

An analog video signal processing unit 11 for inputting an analog video signal to the tape 39 and reading and outputting the video signal recorded on the tape 39;

A digital signal processor 12 for recording the digital information on the tape 39 and processing and outputting the reproduced information;

A rust amplifier 20-29 for amplifying the analog rust signal of the analog image processor 11 and the digital rust signal of the digital signal processor 12, and a head 31-18 for rusting the tape 39. By doing so.

Here, four heads 20-23 for recording and reproducing the analog video signal of the analog video signal processing unit 11 are assigned, and the reason for assigning four heads 20-23 is the standard mode recording method and the long time mode. This is to cope with the recording method.

The heads 24-27 for recording the digital information of the digital signal processing unit 12 are also assigned four, because the amount of information input per unit time is too large for two channels to expand to four channels This is because the two-channel simultaneous recording method is adopted, and all four channels record at the same recording density (19.1 MBPS).

On the other hand, separately assigning two dedicated channels for Hi-Fi, another function in addition to the above eight channels, is difficult in the VHS standard, which is a basic standard of the D-VHS standard, so that the Hi-Fi channel has digital information with the same azimuth angle of the head. Two channels are shared among the recording channels.

That is, the Hi-Fi recording signal processed by the Hi-Fi signal processing unit 13 is recorded or read from the heads 37 and 38 on the tape 39 through the recording material amplifiers 28 and 29 to be reproduced.

In the multi-channel simultaneous recording apparatus for time-dividing the input information and transmitting and recording the input information in a case where it is impossible to transmit and record the input information through one channel due to the increase in the transmission speed of the information,

This is to solve the problem of increasing the number of channels by making the recording density of each channel recorded in multiple channels different from each other.

The present invention includes a time divider for storing the data modulated by the channel modulator in two memories by two times the clock of the input data and reading the stored data at different clock frequencies, and recording the data read from the head of the recorder. It is made by reproducing system that stores the memory in two memories by the clock frequency and reads the stored data as the clock twice as much as input data.

It is possible to make different recording densities of each channel simultaneously recorded in multiple channels.

1 is a circuit diagram of a conventional recording and reproducing apparatus.

2 is a block diagram of a recording system according to the present invention;

3 is a configuration diagram of a regeneration system of the present invention;

4 is a memory select waveform diagram of the present invention;

<Description of the symbols for the main parts of the drawings>

11: analog video signal processor 12: digital signal processor

13: Hi-Fi signal processing unit 20-29: green ash amplifier

31-38: Head 39: Tape

40: channel modulator 50: time division unit

51, 52, 61, 62: memory 60: central part

73, 74: equalization and channel demodulator 75, 76: data detection and clock generator

2 is a recording system circuit diagram of the present invention;

A channel modulator 40 for converting input data into a recording / playback signal;

The time demultiplex unit 50 stores the output data of the channel modulator 40 in two memories by using a memory select signal and reads out the clock corresponding to the amount of data stored in each memory. Wow,

And a recording amplifier 24-27 which amplifies the data read from the memory of the time division section 50 and writes the data to the tape 39 at the heads 35-38.

Here, the time division unit 50 is composed of two memories 51 and 52 to divide and output the output data of the channel modulator 40 by the memory select signal shown in FIG. 4 of the input data. The amount of recording information of the &lt; RTI ID = 0.0 &gt; 52 &lt; / RTI &gt; is different and the data recorded in the memories 51 and 52 are read at different frequencies and output to the recording amplifiers 24- = 27.

The Hi-Fi recording signal 14 is applied to the heads 26 and 27 for recording signals having a low transmission rate among the multi-channel recording channels.

3 is a regeneration system circuit diagram of the present invention;

Multiplexers 71 and 72 for mixing the signals read by the heads 35-38 on the tape 39 through the reproducing amplifiers 24-27;

An equalization and channel demodulation section (73) (74) for equalizing the output signal of the multiplexers (71) (72) and demodulating the original signal;

A data detection and clock generator (75) (76) for detecting digital information of the analog state demodulated by the equalization and channel demodulation unit (73) (74) as a digital state and generating a clock of the same frequency as at the time of recording;

The output of the data detection and clock generators 75 and 76 are stored in two memories at respective clock frequencies, and the clock and memory select signals at the combined frequencies of the two clock frequencies used to store the data stored in the memory are stored. It consists of a time demultiplex unit 60 for reading and transmitting.

Here, the multiplexer 60 is composed of two memories 61 and 62 so that the data detection and the detection data of the clock generator 75 are stored in the memory 61 at the generated clock frequency. The data detection and clock generator 76 ) Is stored in the memory 62 at the generated clock frequency, and the data stored in the memory 61, 62 is read and transmitted by the clock and the memory select signal of the combined frequency of the two clock frequencies used for storage. .

The heads 37 and 38 output the Hi-Fi reproduction signal 15.

In the present invention having such a configuration, the operation of the recorder will be described first.

The channel modulator 40 converts the input data to be recorded into a signal that can be recorded and reproduced in an optimal state in the channel.

At this time, the channel modulator 40 converts the signal to 38.2 MBPS, which is twice the existing channel recording density of 19.1 MBPS.

The time division unit 50 is configured to operate the two memories 51 and 52 as buffers in which input and output are independent, and the output data of the channel modulator 40, which is 38.2 (19.1 × 2) MBPS, is used as input data. The data is inputted through the data buses of 51 and 52 and stored in the memory 51 and 52 by a clock C having a frequency (38.2 MHz) corresponding to the input data.

In this case, the two memory 51 and 52 are complementarily operated by the memory select signal as shown in FIG. 4 to divide and store input data in the memory 51 and 52.

Here, by setting the duty of the memory select signal, the amount of information recorded on each channel can be set by adjusting the time division ratio.

The data recorded in the memories 51 and 52 of the time division unit 50 are read by the clock A (22.9 MHz) and the clock B (15.3 MHz) having different frequencies, and are output to the recording amplifiers 24-27.

At this time, the output of the memory 52 having a low transmission rate is output from the time division unit 50 to the recording amplifiers 26 and 27 in common with the analog Hi-Fi recording signal 14.

Each recording amplifier 24-27 is configured to supply a sufficient current required by the recording head 35-38 by inputting a signal output from the time division section 50, and the recording head 35-38 Data is recorded by changing the electrical signal output from the recording amplifiers 24-27 into a magnetic signal to magnetize the magnetic layer of the tape 39.

Next, a reproduction system for reproducing the signal recorded by the above-described recording crab will be described with reference to FIG.

The heads 35-38 read the signals recorded on the tape 39 and output them to the reproduction amplifiers 24-27. The reproduction amplifiers 24-27 output the minute reproduction signals output from the heads 35-38. Is inputted and amplified to the level required by the equalizer of the equalization and channel demodulators 73 and 74 connected to the reproduction amplifiers 24-27.

The signals amplified by the reproduction amplifiers 24 and 25 are mixed by the multiplexer 71 and applied to the equalization and channel demodulator 73. The signals amplified by the reproduction amplifiers 26 and 27 are mixed by the multiplexer 72. And is applied to the equalization and channel demodulation section 74.

The equalizers of the equalization and channel demodulators 73 and 74 form waveform distortions generated during the recording / reproducing process so as to be close to the signals input to the head during recording, but the output of the signals output from the reproduction amplifiers 24 and 25 is reduced. Since the transmission speed and the transmission speed of the signals output from the reproduction amplifiers 26 and 27 are different, the equalizer characteristics of the equalization and channel demodulators 73 and 74 must also be different so as to be optimal for each reproduction signal. do.

The channel demodulator of the equalization and channel demodulators 73 and 74 performs an operation corresponding to the channel modulator 40 at the time of recording to reduce the modulated and recorded signal to the original signal to be recorded.

The data detection and clock generator 75 inputs a signal output from the equalization and channel demodulator 73 to detect digital information in an analog state as a digital state, and records and reproduces a high frequency signal having a high transmission speed. Timing information is detected to generate a clock A (22.9 MHz) at the same frequency as the clock A at the time of recording.

The data detection and clock generator 76 inputs a signal output from the equalization and channel demodulator 74 to detect digital information in the analog state as a digital state, and records and reproduces the signal as a low frequency signal having a low transmission rate. Timing information is detected to generate a clock B (15.3 MHz) having the same frequency as the clock B at the time of recording.

The digital data and clock frequency are received from the data detection and clock generators 75 and 76, and the time multiplexer 60 composed of two memories 61 and 62 performs an operation corresponding to the time divider 50 of the recorder. To perform

The output data of the data detection and clock generator 75 is stored in the memory 61 of the time multiplexer 60 by clock A and the output data of the data detection and clock generator 76 is clocked by the clock B 60. In the memory 62).

Based on the above operation, the data stored in the memory 61 (62) is read by the clock C which is 38.2 MHz and transmitted as 38.2 (19.1 x 2) MBPS data input at the time of writing.

Here, the data stored in the memories 61 and 62 of the time multiplexer 60 is set by the tuples of the memory select signal set in the recorder as shown in FIG.

The present invention provides an effect that the recording density can be efficiently used when the maximum recording density of each channel is different in the recording and reproducing apparatus for recording multiple channels simultaneously.

Claims (5)

In the multi-channel simultaneous recording method, The data modulated by the channel modulator stores data of two different capacities in two memories by a memory select signal, and the data stored in the memory is read at a clock frequency corresponding to the stored data amount and recorded at different recording densities in each channel. And The data recorded on the tape is read from the head and demodulated, The demodulated data is stored in two memories by the clock frequency corresponding to each data amount. 2. A multi-channel simultaneous recording and reproducing method, characterized in that the data stored in the memory is read out by a clock and a memory select signal that combines the clocks used for storage and then output to one transmission line. In the multi-channel simultaneous recording device, The time modulator for storing the data modulated by the channel modulator complementarily in two memories by setting the duty of the memory select signal, and reading the data stored in the memory at a clock frequency corresponding to the stored data amount and recording the data on a tape. Equipped, The read / demodulated data, which is read from the head, is complementarily stored in two memories by a clock corresponding to each amount of data, and the multi-time section reads the stored data by the clock and the memory select signal of the combined frequency of the two clocks. A multichannel simultaneous recording and reproducing apparatus, comprising: a reproducing system. The memory of claim 2, wherein the time division unit is composed of two memories, and the input data is complementarily stored in two memories by a memory select signal at a clock frequency of 38.2 MHz, and the data stored in one memory is stored at a clock frequency of 22.9 MHz. A multi-channel simultaneous recording and reproducing apparatus, characterized in that reading data stored in another memory at a clock frequency of 15.3 MHz. The method of claim 2, wherein the multiplexer receives data and a clock frequency from a data generator and a clock generator which converts reproduced analog data into a digital state and generates a clock frequency from timing information at the time of recording, respectively. A multi-channel simultaneous recording and reproducing apparatus configured to store data at a clock frequency at the time of recording and to read data stored in the memory as a clock frequency of the two clock frequencies together. 5. The multi-channel simultaneous recording and reproducing apparatus of claim 4, wherein the two memories constituting the multiplex section are configured to store data at clock frequencies of 22.9 MHz and 15.3 MHz, and read data by a memory select signal at a clock frequency of 38.2 MHz, respectively. .

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