KR20000043297A - Analog and digital image recording and recorder for player - Google Patents

Abstract

PURPOSE: A recorder for a player is provided to improve compatibility by recording analog image signals through two heads not used on recording a low-density image signal in a high-density DVHS VCR(video cassette recorder). CONSTITUTION: A digital signal recording/playing unit(19) modulates a high-density digital image signal and records the modulated digital data on a magnetic tape through four heads(R1,R2,L1,L2). On outputting the low-density digital data from the digital signal recording/playing unit, the modulated digital data is recorded on the magnetic tape through the two heads(R2,L2). An analog image signal is transferred to an analog signal recording/playing unit(20) and modulated to be recordable on the tape. A head switching unit(22) is switched on to supply the output signal of the analog signal recording/playing unit to the rest heads(R1,L1) except ones(R2,L2) used on recording/playing the low-density digital data. Thereby, the modulated analog signal is recorded on the tape through the two heads(R1,L1).

Description

Recording device for analog and digital video recording and playback

The present invention relates to a recording device of DVHSV, and more particularly, a low density tape is inserted into a high density VR so that an analog image can be recorded using two heads not used when a digital image is recorded. It is related to the recording device of V-Cal in a DVT.

Various digital signals are formatted by the format unit, modulated by the signal processing unit, recorded on the video tape, and reproduced. The signals recorded on the video tape are demodulated by the signal processing unit, formatted by the format unit, and then output. The rotational speed of the drum is equally known to be 1800 rpm.

The video tape used here is a low-density tape, especially a digital tape, in order to effectively record and reproduce large amounts of digital information without loss or noise, compared to analog video signals.

This low-density tape has a recordable field length of, for example, about 0.8, which is smaller than 1.4, which is a recordable wavelength of a general video tape.

However, in view of the degree of availability, ease of use and compatibility (dual distribution and management of tapes for DVCRs and tapes for general VCRs), it is necessary to use ordinary video tapes instead of high-density dedicated tapes to record and play back digital signals. It can have a high effect on versatility, convenience and compatibility.

In view of this point, the type of broadcast signal supplied from the outside is discriminated, and in the case of the high-density broadcast signal, the existing recording or reproducing speed is maintained, and in the case of low-density broadcast signal, the recording or reproducing speed is changed to the same. Based on the amount of data that can be recorded in one track, the digital signal is divided into a plurality of tracks (multi tracks) to compare the high-density broadcast signal and the low-density broadcast signal, thereby improving the versatility, compatibility, and convenience described above. There is provided a secure digital video recording and playback device.

The above-described techniques are used to determine the type of broadcast signal based on the recordable wavelength of the digital broadcast signal, and to divide the digital signal into multiple tracks in response to the determination result, and to provide a correlation between the divided tracks. It uses technical means such as adding more.

As described above, in the conventional digital video recording and reproducing apparatus, in order to provide a high resolution, the high density DV has four heads, and the four heads of the DV are twice as large as the low density DVs having two heads. Can store data at high speed. At this time, when a low density tape is inserted and a digital video signal is recorded, two of four heads are used for recording. Since two heads are not used at this time, no signal is recorded on the track of the tape recorded using the two heads. Thus, there is a problem that the utilization of the low density tape is lowered.

Accordingly, an object of the present invention is to solve such a problem, and it is possible to improve the compatibility by recording analog video signals through two heads which are not used when recording low density video signals in a high density DC signal. And a recording apparatus of a digital image recording and reproducing apparatus.

In order to achieve the above object, the present invention provides a tuner for tuning a broadcast signal in a DVB having a plurality of heads for recording and reproducing a digital broadcast signal with high density, and a digital output signal of the tuner. A / D converter for converting the signal and digital signal of the A / D converter are demodulated in a corresponding phase, and are made into a transport bit stream (TS) according to the demodulated broadcast signal and outputted. A transport demultiplexer for generating and outputting a package element element stream (PES), which is a unit of information operation that is transmitted at a time by receiving a bit stream (TS), and an A / V for converting a package element stream of the transport demultiplexer into an amppack format. A decoder and an encoder for converting the decoded data from the A / V decoder to be displayed and outputting the TV. A digital signal recording and reproducing processor for modulating the transmission bit stream of the transmission demultiplexer to record on a magnetic tape and demodulating the reproduced digital signal, and an analog signal recording processing to record the analog signal supplied through the RF terminal on the tape; A reproducing processor, a plurality of heads for recording and reproducing data when the output signal of the digital signal recording and reproducing processor is low-density data, and switching according to a switching signal so as not to be used for recording and reproducing low-density data among the plurality of heads. And a head switching unit for supplying an output signal of the analog signal recording and reproducing processing unit to the head, and a control unit for generating the overall function and switching signal of the VHS.

1 is a view showing a digital image and an analog image recording apparatus according to the present invention.

<Explanation of symbols on the main parts of the drawing>

11: tuner 12: A / D conversion unit

13: transmission demultiplexer 14: A / V decoder

15: encoder

18: digital signal recording and playback processing unit

20: analog signal recording and playback processing unit

22: head switching unit 24: control unit

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

Figure 2 is a view showing a high density DV HS V to which the present invention is applied. Here, the digital signal of the broadcast signal of the plurality of channels of the repeater tuned through the tuner 11 at the output side of the tuner 11 which receives through the antenna and selects a specific repeater and converts the broadcast signal received through the antenna into a digital signal. An A / D converter 12 for converting the signal to a digital signal is connected, and on the output side of the A / D converter 12, demodulation of each phase difference of the broadcast signal converted into a digital signal is performed according to the broadcast signal of the demodulated channel. A transport demultiplexer 13 that generates and outputs a transport bit stream (TS) and generates and outputs a package element stream (PES), which is an information operation unit that is received and transmitted at a time. Is connected, and an A / V decoder 14 for decoding the package element stream according to the amppack standard is connected to the output side of the transmission demultiplexer 13.

The output unit 15 is connected to an output unit 15 for encoding a broadcast signal of a channel decoded from the A / V decoder unit 14 and outputting the encoded broadcast signal to a TV side (not shown).

To the output side of the transmission demultiplexer 13 is connected a digital signal recording and reproducing processor 18 which modulates the transmission bit stream to be recorded on the magnetic tape and demodulates the digital signal recorded on the magnetic tape.

On the other hand, a digital signal recording and reproducing processing section 20 which modulates to record an analog signal on a magnetic tape and demodulates a digital signal recorded on the magnetic tape is connected to an input side of a DVSHV RF terminal or a terminal of a television. .

A plurality of heads R1, L1, R2, and L2 for recording the modulated digital signal on the magnetic tape and reproducing the recorded digital signal are connected to the output side of the digital signal recording and reproducing processor 18. .

On the other hand, at the output side of the analog signal recording and reproducing processor 20, a head switching unit 22 for selecting an unused head among the plurality of heads for recording the modulated analog signal on a magnetic tape and reproducing the recorded analog signal. The control unit for controlling the overall function of the system and generating a head switching signal for selecting the head according to the analog and digital images supplied from the outside is connected to the input of the switching unit 16 and the head switching unit 22 ( 24) is connected.

In the DV BS provided in this way, a plurality of channel broadcast signals transmitted from a specific repeater of a broadcasting station are supplied to the tuner 11, and the tuner 11 tunes the plurality of channel broadcast signals, The analog channel broadcast signal is supplied to the A / D converter 12, and the A / D converter 12 converts the analog channel broadcast signal into a digital signal.

Since the channel broadcast signals converted into digital signals have different phase differences, they are demodulated by respective phase differences, and the demodulated four channel broadcast signals are supplied to the transmission demultiplexer 13, and the transmission demultiplexer 13 is one broadcast. Creates and outputs a transport bit stream (TS) according to a signal, and generates and outputs a package element stream (PES), which is an information operation unit that is received at one time by receiving the transport bit stream (TS). .

The data stream output from the transmission demultiplexer 13 is supplied to the A / V decoding unit 14, and the A / V decoding unit 14 receives the data stream and receives an amppack 2 (MPEG 2: Moving Picture Experts Group 2). Decode to format

The decoded data is supplied to the encoder 15, and the encoder 15 encodes the compressed data into a reproducible signal from a digital signal. The encoded video signal is supplied to the TV and reproduced.

Meanwhile, the analog video signal supplied through the RF terminal and the transmission bit stream output from the transmission demultiplexer 13 are respectively supplied to the analog signal recording and reproducing processor 20 and the digital signal recording and reproducing processor 18, respectively.

The digital signal recording and reproducing processor 18 modulates a high density digital video signal to enable recording of a magnetic tape, and modulates the modulated digital data onto the tape through four heads R1, R2, L1, and L2. Is recorded.

On the other hand, when the digital data output from the digital signal recording and reproducing processor 18 is low density data, the modulated digital data is recorded on the magnetic tape through the two heads R2 and L2.

At this time, the analog video signal is supplied to the analog signal recording and reproducing processor 20, and the analog signal recording and reproducing processor 20 modulates the analog video signal to enable recording of the magnetic tape.

Then, in response to the head switching signal output from the control unit 24, the head switching unit 22 uses the output signal of the analog signal recording and reproducing processing unit 20 to record and reproduce low density digital data (R2) ( Switched to supply to the remaining heads R1 (L1) except for L2, whereby the modulated analog signal is recorded on the tape via the two heads R1 (L1).

As described above, the present invention, by recording the analog video signal to the two heads that are not used when the low density digital video signal is recorded on the DVB which can record and reproduce the digital video signal with high density This has the effect of improving the utilization of the tape.

Claims (1)

In a DVD HS having a plurality of heads for recording and reproducing digital broadcast signals with high density, Tuners for tuning broadcast signals An A / D converter converting the output signal of the tuner into a digital signal; The digital signal of the A / D converter is demodulated in a corresponding phase, and is output as a transport bit stream (TS) according to the demodulated broadcast signal. The transport bit stream (TS) is received and transmitted at once. A transmission demultiplexer for generating and outputting a package elementary stream (PES) that is an information manipulation unit; An A / V decoder for converting a package element stream of the transmission demultiplexer into an amp format; An encoder for converting the decoded data from the A / V decoder to be displayed and outputting the TV; A digital signal recording and reproducing processor for modulating the transmission bit stream of the transmission demultiplexer to record on a magnetic tape and demodulating the reproduced digital signal; An analog signal recording and reproducing processor for processing the analog signal supplied through the RF terminal to be recorded on the tape; A plurality of heads for recording and reproducing data when the output signal of the digital signal recording and reproducing processor is low density data; A head switching unit which switches according to a switching signal and supplies an output signal of the analog signal recording and reproducing processing unit to a head which is not used when recording and reproducing low density data among a plurality of heads; A recording apparatus of analog and digital video recording and reproducing apparatus, characterized by comprising a control unit for generating the overall function and switching signal of the DV HS.