KR100210123B1 - Dvhs tape dubbing method in dvhs vcr - Google Patents

Abstract

The present invention enables the user to record and play back audio dubbing sounds related to a program recorded on a tape on a currently unused cassette audio track of a DV Tape used in DVSV, A function selecting step 210 for selecting a dubbing function by pressing a dubbing recording button when a DVHS tape is inserted and a reproduction function button is pressed to view a reproduction screen and audio dubbing is required in a required scene, A dubbing recording step (220) of recording a dubbing sound on a cue audio track of the DVHS tape using the VHS audio head on the DVHS tape when the dubbing function is selected in the selection step; The video signal and audio notes recorded on the tracks of the DVHS tape And a dubbing reproduction step (230) for mixing the dubbing sound with the normal reproduction signal, or reproducing the dubbing sound by mixing the dubbing sound with the normal reproduction signal. The DVS tape dubbing method according to claim 1, It is possible to increase the interest in viewing a program and also to make it possible to easily store information related to the program.

Description

How to dub a DV HV tape from DV HVS

The present invention relates to a cue audio track which is not currently used in a DVHS tape used in a DVHS VCR (Digital VHS Video Casestech Recorder, hereinafter referred to as DVHS VCR) A separate VHS audio dubbing signal relating to the program can be recorded so that the dubbing signal can be independently reproduced during reproduction or mixed with the DVHS audio signal of the program so that it is possible to increase the interest in viewing the program recorded on the DVHS tape And also relates to a method for dubbing DV tape on a DVI-S-VISIAL so that information related to a program can be easily stored.

Currently, the DVHS VCR under development is a type of digital VCR, unlike the conventional analog VHS VCR, which digitizes the video signal input from various signal sources and outputs it to a dedicated editor or workstation workstations) or personal computers (PCs) to perform various editing and advanced functions that were impossible in conventional analog VCRs, as well as video and audio recordings that enable high-quality recording and playback As a playback device, it is used in connection with a broadcasting satellite (BS), a high definition TV (HDTV) and a set top box (Set Top Box), which is expected to play a pivotal role in the field of next generation multimedia devices It is one.

For digital video tapes used in such a DVCR, the format of the D1 to D6 standard, which is a SMPTE standard specification defined by the Society of Motion Picture and Television Engineers of the United States and Europe, is set as shown in Table 1 below. .

SMPTE digital video tape recording standard and performance by each type D-1 D-2 D-3 D-5 D-6 Video format component Composite Composite Composite HDTV component Tape Width 3/4 inch 3/4 inch 1/2 inch 1/2 inch 3/4 inch Cassette size D-1 standard D-2 standard D-3 standard D-3 standard D-2 standard Tape speed 11.3 ips 5.2 ips 3.3 6.6 ips 20.7 ips Tape size 8.48 sq.in.s 3.9 sq.in./s 1.65 sq.in./s 3.3 sq.in./s 15.5 sq.in./s Number of video channels 4 2 2 4 8 Number of recording heads per channel One 2 2 2 2 Total number of heads on the video drum 12 10 10 18 34 Video track width 1.6 miles 1.6 miles 0.8 miles 0.8 miles 0.8 miles Azimuth record No Yes Yes Yes Yes Drum diameter 2.95 inches 3.8 inches 3.0 inches 3.0 inches 3.8 inches Drum rotation speed 150 rps 89.9 rps 89.9 rps 89.9 rps 150 rps Video recording speed 1,404 ips 1,080 ips 847 ips 847 ips 1,773ips Video sampling rate - Y 13.5 MHz Video sampling rate - C 6.75 Mhz Total video data rate 216 Mbps 115/142 Mbps 115/142 Mbps 216 Mbps 1.2 Gb / s Video channel coding method R-NRZI M ² 8,14 8,14 8,12 Performance value Cassette recording speed 94 minutes (L) Cassette 64 minutes (L) Cassette Video bandwidth 6Mhz Luminance signal 6.0Mhz Not used Not used 30MHz Color difference signal 2.75 MHz Not used Not used 15MHz S / N ratio among each channel 56dB 54dB Cross color distortion None Cross-luminance distortion None Color artifacts Minimal

As shown in FIG. 1, these D1 to D6 formats, which are technical standards for digital video tape, use the upper surface of a tape having a width of 3/4 to 1/2 inch as a queue audio track, And a video signal and an audio signal are recorded on a track-by-track basis with a predetermined azimuth angle for each type on the central surface of the tape, and a control track for recording a control signal on the lower surface of the tape, And a time code track for recording time information.

This videotape recording standard was initially difficult due to the bit rate required for high quality video, but could be overcome due to continued tape media and head technology and related technologies. In the above standard for digital recording, the D1 format is the first digital recording format for a component signal. The sampling rate is 13.5 MHz for the luminance component, two chrominance signals C1 and C2 (chrominance) And 6.75 MHz, which is 1/2 of the luminance signal, are used for the components. This sampling rate uses a 4-2-2 sampling scheme where the sampling rate of the composite signal is four times the frequency of the subcarrier. Although the D2 format may be the best choice for broadcasting for the pursuit of complete digital production, the D1 format is rather difficult to apply in real environments using most analog equipment, It was created as an alternative to take advantage of. And, the D3 and D5 formats are compatible with composite and composite signals, respectively, allowing 1/2-inch tapes to be used to produce lighter, less expensive equipment with good performance. The D6 format, on the other hand, is a specification written for component registers for 1125/60 and other HDTV signals.

The standard format for such digital recording employs a component format that eliminates artifacts, cross colors, cross luminance and other flaws in the composite NTSC, PAL and SECAM schemes , And provides a target value that can achieve the image quality required by the related industry with current technology.

In such a DVCR, in particular, a DVHS VCR has been developed so that the analog VHS tape used in a conventional analog VHS VCR and the DVHS type tape, which is a digital tape according to the above standard, can be used together in the same deck, The internal circuit has a separate circuit to reproduce and record both the analog tape and the digital tape according to the type of the tape detected by the deck.

On the other hand, in the D1 to D6 standards of the digital video tape recording system using the digital video tape recording format as described above, the queue audio track which is provided at the upper edge of the tape and is not currently used, A video / audio track in which video and audio signals are mixedly recorded in a track, and a control track in a deck portion of the VCR provided at the lower edge of the tape to record a control signal for controlling the servo system related to the running of the tape, And a time code track in which time information of the contents recorded on the tape is recorded. In this format configuration, the user can record separate audio dubbing information related to the program recorded on the tape during DVHS tape recording or editing after recording. There was no way to record DVHS tapes and there were inconveniences when editing .

In order to solve the above inconvenience, the present invention allows a user to record predetermined program-related audio dubbing information on an upper queue audio track of a digital video tape that is not currently used, And to read and reproduce the dubbing signal according to a function of the dubbing tape recording program.

FIG. 1 is a data format of each of SMPTEs D1 to D6, which is a standard specification of a digital tape applied to a current digital VISUAL.

FIG. 2 is a flow chart showing a processing procedure in a DVHS tape dubbing method in DVSSV according to the present invention. FIG.

3 is a block circuit diagram showing input / output relationships of respective audio signals through DVS and VHS when dubbing DVS tape from DVSV according to the present invention.

FIG. 4 is a block circuit diagram showing a mixing / dubbing reproduction relationship between a DVS-S audio signal and a VHS-S audio signal by a microcomputer during reproduction after a DVS-Tape dubbing in DVSV according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

31: DV HVS 32: V HVS

41: Microcomputer 42:

210: function selection step 220: dubbing recording step

230: Dubbing playback step

In order to achieve the above object, in the case where a user inserts a DVHS tape into a deck of a DVHS VCR and presses a playback function button to start audio playback of a tape, A dubbing recording step of recording a dubbing sound to a queue audio track of a DVHS tape using an audio head of a VHS unit on a DVHS tape when the dubbing function is selected in the function selecting step; When the reproducing function is selected in the selecting step, a normal reproducing operation for reproducing the video signal and the audio sound recorded on the track of the DVHS tape is performed again according to the selection, or a dubbing reproducing operation for mixing and reproducing the dubbing sound in the normal reproducing signal Respectively.

In the present invention, an audio head provided in the VHS section of the DVHS VCR is used for a currently unused cue audio track of a DVHS tape used for recording and playback in a DVHS VCR used for both a DVHS tape and a VHS tape A separate dubbing sound in the form of a general audio signal can be recorded and mixed with the audio signal recorded on the oblique track surface during reproduction so as to be reproduced or can be reproduced singly.

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

2, when a user inserts a DVHS tape into a deck of a DVHS VCR and presses a playback function button to start dubbing a tape, A selection step 210 of selecting a dubbing function by pressing a dubbing recording button when the dubbing function is selected in the function selecting step; (220) for reproducing a video signal and an audio signal recorded on a track of the DVHS tape in accordance with a selection when the reproducing function is selected in the function selecting step, And a dubbing reproduction step 230 for mixing and reproducing the dubbing sound.

The function selection step 210 includes a step 211 of inserting a DVHS tape into the deck of the DVHS VCR to select a playback mode by pressing a play key after the system is driven, A step 213 of selecting a dubbing mode by pressing a dubbing key or pressing a play key to perform a dubbing operation to a desired scene while viewing a screen on which a user is playing, Respectively.

If the user selects the dubbing mode in step 213 of the function selecting step 210, the dubbing recording step 220 may be performed while the DVHS tape is normally reproduced and the DVHS tape is recorded on the DVHS tape using the audio head of the VHS unit 32 A step 222 of recording a dubbing sound to the audio track, and a step 222 of checking whether the user presses the dubbing stop key and then proceeding to the step 212 if the dubbing stop key is pressed, .

The dubbing reproduction step 230 may include a step 231 of checking whether the user selects the audio mixing function in a state in which the reproduction is performed when the user selects the reproduction mode in step 213 of the function selection step 210, A step 234 of detecting the end of the tape while mixing and reproducing the audio dubbing sound recorded in the cue audio track in addition to the video signal and the audio signal recorded in the oblique track of the DVHS tape when the audio mixing function is selected in step 231, A step 234 of detecting the end of the tape while performing normal playback of only the video signal and the audio signal recorded on the oblique track of the DVHS tape when the audio mixing function is not selected, (Step 233), and thereafter checking whether the end of the tape is detected and ending the process when the tape is finished (step 234) Respectively.

In the DVHS VCR used for the DVHS tape and the VHS tape, the VHS unit 32 of the DVHS DVCR is connected to the queue audio track which is not currently used in the DVHS tape having the recording format as shown in FIG. And a dubbing sound separate from the audio signal of the program recorded on the oblique track can be recorded and reproduced.

In more detail, in the DVHS dubbing mode, the video signal and the audio signal recorded on the oblique track surface of the DVHS tape are read through the video head and the audio head on the rotating head of the DVHS VCR as shown in FIG. 3, And causes a dubbing audio signal input through a microphone (not shown) through the audio head of the VHS unit 32 to be recorded on the queue audio track of the DVHS tape.

In the DVHS playback mode, the microcomputer 41 of the DVHS VCR controls the switch 42 by selecting the mixing playback function or the normal playback function, as shown in FIG. 4, so that the SW ₁ or SW _{2 is turned on} Off so that only the video / audio signal on the oblique track surface of the DVHS unit 31 is reproduced or the VHS unit 32 is also driven so that the dubbed audio signals are reproduced together.

2, when a tape is inserted into a DVHS deck and the system is powered on, a DVHS tape dubbing method program is loaded on the DVHS microcomputer 41 according to the present invention. If the user selects the other function without pressing the play button, the corresponding function is performed. If the user presses the play button to select the play function (211), the function selection state is checked (212 If the user selects the dubbing function, it is determined whether the selected function is the dubbing recording or reproduction (213). If the user selects the dubbing function, the microphone is attached to the cue audio track of the DVHS tape through the audio head of the VHS unit 32 (221), it is checked whether or not the dubbing stop key is pressed. When the dubbing is stopped, If it is determined in step 213 that the selected function is dubbing playback, it is checked whether it is audio mixing playback again (step 231). If it is audio mixing playback, In addition to the recorded video signal and audio signal, the end of the tape is detected (232) while the audio dubbing sounds recorded on the queue audio track are mixed and reproduced. Meanwhile, when the audio mixing function is not selected, (233) to check whether the end of the tape is detected, and to terminate (234) when the tape ends.

According to the present invention as described above, in a DVHS VCR that uses a DVHS tape and a VHS tape, an audio head provided in a VHS section of a DVHS VCR is used as a general audio signal type It is possible to increase the interest in viewing a program recorded on the DVHS tape and to easily store information related to the program by making it possible to record and reproduce a separate dubbing sound.

Claims (4)

A method for dubbing an audio signal from a DVHS VCR to a DVHS tape, When a user inserts a DVHS tape into the deck of a DVHS VCR and presses the playback function button to start dubbing, the dubbing function is selected by pressing the dubbing recording button (210); A dubbing recording step (220) of recording a dubbing sound on a queue audio track of the DVHS tape using the audio head of the VHS unit (32) on the DVHS tape when the dubbing function is selected in the function selecting step (210); When the playback function is selected in the function selection step 210, normal playback in which a video signal and an audio sound recorded on the oblique track of the DVHS tape are reproduced is performed again or a dubbing sound is mixed with the normal playback signal and played back And a dubbing reproduction step (230). ≪ Desc / Clms Page number 20 > The method of claim 1, wherein the function selection step (210) comprises: (211) selecting a playback mode by inserting a DVHS tape into a deck of a DVHS VCR and then pressing a playback key after the system is driven; (212) of reproducing the DVHS tape while driving the tape at the DVHS unit (31); (213) of selecting a dubbing mode by pressing a dubbing key or performing a reproducing mode by pressing a reproducing key in order to perform audio dubbing on a desired scene while watching a screen being reproduced by a user, How to dub the tape in Sial. The method as claimed in claim 1, wherein the dubbing recording step (220) is performed by using the audio head of the VHS unit (32) while normally reproducing the DVHS tape when the user selects the dubbing mode in step 213 of the function selecting step Recording 221 a dubbing sound on the queue audio track of the DVHS tape; (222) for checking whether the user depresses the dubbing stop key, and if the dubbing stop key is depressed, go to the step 212 and perform the reproducing mode again (222). In the DVB- S-tape dubbing method. The method according to claim 1, wherein the dubbing reproduction step (230) comprises: checking whether the user selects the audio mixing function again in a state in which reproduction is performed when the user selects the reproduction mode in step 213 of the function selection step (231); The step 234 of detecting the end of the tape while mixing and reproducing the audio dubbing sound recorded in the cue audio track in addition to the video signal and the audio signal recorded in the oblique track of the DVHS tape when the audio mixing function is selected in the step 231 Proceeding 232; If the audio mixing function is not selected, proceeding to step 233 of detecting the end of the tape while performing normal playback of only the video signal and audio signal recorded on the oblique track of the DVHS tape; (234) a step (234) of checking if the end of the tape is detected and ending the tape when it is finished. ≪ Desc / Clms Page number 24 >