JPH03120685A - Digital reproduction device - Google Patents

Abstract

PURPOSE:To prevent unnecessary sub-code ID from being recorded in an unnecessary place by permitting an digital output user/data setting part not to set start ID and shortening ID of user data but to output a digital output signal while searching. CONSTITUTION:When a search key 13 is detected to be closed, searching is started, sub-code information transmitted from a bus-code discrimination part 8 is read. The digital output user/data setting part 9 sets the start ID and the shortening ID of user data to zero and outputs the digital output signal. When the target position of the tape is detected, reproduction is started from that position, and the start ID and shortening ID of user data are set in correspondence with the output of a sub-code decoder in the middle of reproduction. Thus, unnecessary sub-code ID is prevented from being recorded in the unncessary position in the middle of searching even if the signal is digital- inputted and recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is capable of playing back a tape on which audio information and subcode information have already been recorded, and outputting a serial signal in accordance with the digital audio interface format. digital audio tape
The present invention relates to digital playback devices such as players.

Conventional technology A rotary head digital tape recorder (R-DAT), which is an example of a digital playback device, uses a PC as the main signal.
Subcodes such as a start ID, shortening ID, and program time can be recorded together with the M audio signal. The start ID indicates the beginning of a piece of music, and by determining the start ID during fast forwarding or rewinding of the tape, a high-speed cue search can be performed. Further, by using the shortening ID, it is possible to skip from that position to the next start ID or the next step program song. The start ID and shortening ID can be digitally copied between DATs using digital output according to the Digital Audio Interface format.

Problems to be Solved by the Invention However, conventional digital playback devices have had the following problems. Not only during playback but also during search mode, if a subcode obtained by signal processing includes a start ID or shortening ID, user data of a digital output signal corresponding to the subcode is output. Therefore, when the signal is digitally input and recorded, unnecessary subcode IDs detected during the search are detected.
was recorded.

In view of the above problems, the present invention sets the start ID and shortening ID of user data to none during a search,
During playback, the start ID and shortening ID are set to correspond to the played subcode, or when the start ID indicating the beginning of the song is detected during program playback, the next step song is searched. The start ID is now set as "no start ID" until the playback is started.
Alternatively, if the shortening ID cancel key is closed during playback, even if shortening 10 is detected, the playback mode will continue without skipping, the shortening ID will always be set to none, and a digital output signal will be output. The present invention provides a digital playback device having the following features.

Means for Solving the Problems In order to solve the above problems, the digital magnetic recording and reproducing apparatus of the present invention has a mechanism for supporting and running the recording medium, and a mechanism for separating the reproduced signal into a PCM signal and a subcode signal. a PCM decoder that demodulates audio information from a PCM signal, a subcode decoder that demodulates subcode information from a subcode signal, and a digital audio system that generates a serial signal in accordance with a digital audio interface format. - an interface transmission section, an output terminal that outputs a digital output signal, and a subcode discrimination section that discriminates the content of the subcode demodulated by the subcode decoder;
The entire system includes a digital output user data setting section that sets user data of the digital output signal, a mechanism control section that controls the mechanism, a subcode discrimination section, a digital output user data setting section, and a mechanism control section. The system controller includes a system controller unit that performs control and a search key that commands the start of a search, and when the system controller detects closing of the search key, sets the mechanism to a search mode,
reads the subcode information sent from the subcode discrimination section, and during the search, sets the start ID and shortening ID of the user data to none by the digital output user data setting section to output a digital output signal; When the target tape position is detected, playback starts from there, and the start ID of the user data is used during playback.
The shortening ID is controlled to be set in accordance with the output of the subcode decoder.

There is also a program key for inputting programs,
A system controller including a program storage unit for storing an input program, the system controller stores the program input by the program key in the program storage unit, and when the system controller detects closing of the search key. , set the mechanism to search mode, read the subcode information sent from the subcode discrimination section, and during the search, read the start ID and shortening ID of the user data from the digital output user data setting section number. When the target song is detected, playback starts from there. During program playback, the shortening ID of the user data is set to correspond to the output of the subcode decoder. , the start ID is set to exist only for the one detected the first time after the end of the search, and the start ID for the second time is set to be present.
Even if D is detected, it is set as absent and the next song stored in the program storage section is controlled to be searched.

In addition, the system controller is equipped with a shortening ID cancel key to prevent skipping even if a shortening ID is detected during playback, and the system controller is equipped with a shortening ID cancel key that prevents skipping even if a shortening ID is detected during playback.
If the key is closed, the playback mode continues without skipping, reads the subcode information sent from the subcode discrimination section, and starts user data.D corresponds to the output of the subcode decoder. The shortening ID is always set to "absent", and the shortening ID is always set to "absent" to output a digital output signal.

With this configuration, the digital playback device of the present invention starts a search when it detects that the search key is closed, reads the subcode information sent from the subcode discrimination section, and outputs digital output to the user during the search. The start ID and shortening ID of user data are determined by the data setting section.
is set to None to output a digital output signal, and when the target tape position is detected, playback starts from there, and during playback, the start ID and shortening ID of user data correspond to the output of the subcode decoder. Therefore, even if the signal is digitally input and recorded, unnecessary subcode IDs can be prevented from being recorded at unnecessary locations during the search.

Furthermore, if the system controller includes a program storage section and has a program playback function, the program input using the program key is stored in the program storage section, and when the closing of the search key is detected, the search is performed. starts, reads the subcode information sent from the subcode discrimination section, and during the search, the digital output user data setting section sets the start ID and shortening II) of the user data to none and outputs a digital output signal. When the target song is detected, playback starts from there. During program playback, the shortening ID of the user data is set corresponding to the output of the subcode decoder, and the start ID is set for the first time after the search ends. The next song stored in the program storage section is searched by setting it to exist only for the detected start ID, and setting it to be absent even if the second start ID is detected, so that start IDs other than the programmed songs are copied. You can prevent it from happening.

Additionally, if a shortening ID cancel key is provided, the system controller will continue the play mode without skipping even if a shortening ID is detected during playback, and if the shortening ID cancel key is closed. , reads the subcode information sent from the subcode discrimination section, and the start ID of the user data is determined by the subcode information.
Since the shortening ID is set corresponding to the output of the decoder and the shortening ID is always set to be absent and a digital output signal is output, only the start ID can be copied.

Embodiment Below, a digital magnetic recording and reproducing apparatus according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram when the present invention is applied to an R-DAT.

1 is a mechanism consisting of a drive device and a rotary head for running the magnetic tape, 3 is a separator that separates the reproduced signal into a PCM signal and a subcode signal, and 4 is a PCM
a PCM decoder that demodulates audio information from the signal, 5
is a subcode decoder that demodulates subcode information from a subcode signal; 6 is a digital audio interface transmitter that generates a serial signal in accordance with the digital audio interface format; and 7 is an output that outputs a digital output signal. terminal; 8 is a subcode discriminator that determines the content of the subcode demodulated by the subcode decoder; 9 is a digital output user data setting unit that sets user data of the digital output signal; 10 is a mechanism that controls the mechanism. control unit,
Reference numeral 11 designates a program storage unit for storing an input program, 12 a system controller unit that controls the entire system, 13 a search key for instructing the start of a search, and 14 a program key for inputting a program. 15 is a shortening ID cancel key for preventing skipping even if a shortening ID is detected during playback.

Regarding the digital playback device configured as above,
The operation will be described with reference to FIG. 1 which shows the block configuration of the system and FIG. 2 which shows part of the operation of the system controller 12 on a program analysis diaphragm (PAD).

For example, when the current mode is stopped, the search key is closed. The system controller 12 detects this in a decision block 17 and sets the next mode to search in a processing block 18. Thereby, in processing block 19, mechanism control section 10 sets mechanism 1 to search, and in processing block 20, digital output user data setting section 9 sets mechanism 1 to search.
Set the data start ID and shortening ID to none. The digital chill audio interface transmitter 6 then sends the start ID and shortening ID.
Output as fixed data without. When the target tape position is detected in the determination block 21, the next mode is set to playback in the processing block 22. Thereby, in processing block 23, the mechanism control section sets the mechanism to regeneration. A digital signal read from the magnetic tape as a reproduction signal is separated into an audio signal and a subcode signal by a separator 3. The audio signal is deinterleaved by the PCM decoder 4,
After error correction, etc., the signal is sent to the digital audio interface transmitting section. The subcode signal is demodulated into subcode information by a subcode decoder 5 and sent to a subcode discriminator 8. In processing block 24, the digital output user data setting section sets the start ID and shortening ID of the digital output user data in accordance with the reproduced subcode. In response to this, the digital audio interface transmitter 6 converts the reproduced audio information and subcode information into a serial signal according to the digital audio interface format and outputs the serial signal. According to this embodiment, during a search, the start ID and showing ID of the digital output user data are output without fixed values, so even if the signal is digitally input and recorded, unnecessary sub It is possible to prevent the code ID from being recorded.

Next, regarding the second embodiment of the present invention, the PA of FIG.
This will be explained with reference to D. Note that the block configuration shown and explained in FIG. 1 is the same, and the explanation will focus on the different processing of the system controller.

For example, if the current mode is program, the program entered by the program key 14 in the determination block 26 and the processing block 27 is stored in the program storage unit 1.
Store in 1. Then, when the search key is closed, this is detected in the determination block 28, and the processing block 2
In step 9, the next mode is set to program search.

In processing block 30, the mechanism control section sets the mechanism to search, and in processing block 31, the digital output user data setting section sets the start ID and shortening ID of the digital output user data to none. When the target tape position is detected in the determination block 32, the next mode is set to program playback in the processing block 33. Thereby, in processing block 34, the mechanism control section sets the mechanism to regeneration. Determination block 35 and processing block 3
Digital output user until you play the position where the start ID of the desired song is recorded! The data setting section sets the start ID and shortening ID of digital output user data in accordance with the reproduced subcode. However, from then until the next song is played, the start ID is set to nothing in processing block 37, and only the shortening ID is set corresponding to the playback data. In determination block 38, it is determined that the reproduction of one song has ended.In processing block 39, program search is again set to search for the next song stored in the program storage section. As described above, according to this embodiment, during program playback, the start ID of the user data
is set to be present only for the first detected one after the end of the search, and set to be absent even if the second start ID is detected, and the start of a song other than the programmed one is set.D is the digital audio interface transmitter. Since the signal is not outputted from the start ID, even if the signal is digitally input and recorded, an unnecessary start ID can be prevented from being recorded at an unnecessary location.

Next, a third embodiment of the present invention will be described with reference to the PAD shown in FIG. Note that the block configuration shown and explained in FIG. 1 is the same, and the explanation will focus on the different processing of the system controller.

For example, in the determination block 41, the shortening ID
If it is determined that the cancel key is closed, the reproduction mode is continued without skipping even if a shortening ID is detected during reproduction. At this time, in the processing block 42, only the start ID of the user data is set corresponding to the output of the subcode decoder, the shortening ID is always set to be absent, and a digital output signal is output. In this way, according to this embodiment, when the shortening ID cancel key is closed, the shortening ID is not output digitally, so if the signal is digitally input and recorded, only the start ■D can be copied. .

DETAILED DESCRIPTION OF THE INVENTION As described above, the present invention starts a search when the search key is closed, reads the subcode information sent from the subcode discrimination section, and uses the digital output user data setting section during the search. When the user data start ID and shortening ID are set to none, a digital output signal is output, and when the target tape position is detected, playback starts from there, and during playback, the user data start ID and shortening ID are set to none. Since the shortening ID is set corresponding to the output of the subcode decoder, even if the signal is digitally input and recorded, unnecessary subcode IDs will not be recorded at unnecessary locations during the search. I can do it.

Furthermore, if the system controller includes a program storage section and has a program playback function, the program input using the program key is stored in the program storage section, and when the closing of the search key is detected, the search is performed. The subcode information sent from the subcode discrimination unit is read, and during the search, the digital output user data setting unit sets the start ID and shortening ID of the user data to none, and outputs a digital output signal. , When the target song is detected, playback starts from there, and during program playback, shortening of user data ■D is set corresponding to the subcode ≠ user output, and the start ID is set for the first time after the search ends. The next song stored in the program storage section is searched by setting it to exist only for the detected start ID, and setting it to be absent even if the second start ID is detected, so that start IDs other than the programmed songs are copied. You can prevent it from happening.

Furthermore, if a shortening ID cancel key is provided, the system controller will continue the playback mode without skipping if the shortening ID cancel key is closed even if shortening 10 is detected during playback.
The subcode information sent from the subcode discrimination section is read, the start ID of the user data is set in accordance with the output of the subcode decoder, the shortening ID is always set to none, and a digital signal is output. , only the start ID can be copied.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a digital playback device according to one embodiment of the present invention, FIG. 2 is a PAD diagram showing the operation of the same device, and FIGS. 3 and 4 are diagrams showing other embodiments of the same device. It is a PAD diagram showing operation. 1...Mechanism, 2...Reproduction amplifier, 3...Separator, 4...PCM decoder, 5...Subcode decoder, 6...
・・・Digital audio interface・
Transmitter, 7...Output terminal, 8...Subcode discrimination section, 9...Digital output user.
Data setting section, 10...Mechanism control section, 1
1...Program storage unit, 12...System controller unit, 13...Search key 14...Program key 15...
Shortening ID cancel key

Claims (2)

[Claims] (1) A mechanism for supporting and running the recording medium, a separator that separates the reproduced signal into a PCM signal and a subcode signal, a PCM decoder that demodulates audio information from the PCM signal, and a subcode from the subcode signal. A subcode decoder that demodulates information, a digital audio interface transmitter that generates a serial signal according to the digital audio interface format, an output terminal that outputs a digital output signal, and a subcode decoder that demodulates the information. a subcode discriminator for discriminating the content of the subcode, a digital output user data setting section for setting user data of the digital output signal, a mechanism control section for controlling the mechanism, the subcode discriminator and the A system controller section that controls the entire system including a digital output user data setting section and the mechanism control section, and a search key that instructs to start a search,
When the system controller detects that the search key is closed, the system controller sets the mechanism to a search mode, reads the subcode information sent from the subcode discrimination section, and during the search, the digital output user
The data setting section sets the start ID and shortening ID of user data to none, outputs a digital output signal, and when the target tape position is detected, playback starts from there, and during playback, the start ID and shortening ID of user data are output. A digital playback device characterized by controlling an ID and a shortening ID to be set in accordance with the output of a subcode decoder. (2) A mechanism for supporting and running the recording medium, a separator that separates the reproduced signal into a PCM signal and a subcode signal, a PCM decoder that demodulates audio information from the PCM signal, and a subcode from the subcode signal. A subcode decoder that demodulates information, a digital audio interface transmitter that generates a serial signal according to the digital audio interface format, an output terminal that outputs a digital output signal, and a subcode decoder that demodulates the information. a subcode determination section that determines the content of the subcode that has been input; a digital output user data setting section that sets user data of the digital output signal; a mechanism control section that controls the mechanism; and a mechanism control section that stores the input program. a system controller unit for controlling the entire system including the subcode discrimination unit, the digital output user data setting unit, the mechanism control unit, and the program storage unit; and a system controller unit for inputting the program. a program key, and a search key for commanding the start of a search, the system controller stores the program input by the program key in a program storage unit, and detects closing of the search key. When the mechanism is set to search mode, the subcode information sent from the subcode discrimination section is read, and during the search, the start ID and shortening ID of the user data are set by the digital output user data setting section. When the target song is detected, playback starts from there. During program playback, the shortening ID of the user data is set to correspond to the output of the subcode decoder. , the start ID is set to be present only for the one detected the first time after the end of the search, and set to be absent even if the start ID is detected for the second time, so that the next song stored in the program storage section is searched. A digital playback device characterized by being controlled. 3) a mechanism for supporting and running the recording medium;
A separator that separates the reproduced signal into a PCM signal and a subcode signal, a PCM decoder that demodulates audio information from the PCM signal, a subcode decoder that demodulates subcode information from the subcode signal, and a digital
A digital audio interface transmission section that generates a serial signal according to the audio interface format, an output terminal that outputs a digital output signal, and a subcode discrimination section that discriminates the content of the subcode demodulated by the subcode decoder. , a digital output user data setting section for setting user data of the digital output signal, a mechanism control section for controlling the mechanism, the subcode discrimination section, the digital output user data setting section, and the mechanism control section. The system controller includes a system controller that controls the entire system including the shortening ID, and a shortening ID cancel key that prevents skipping even if a shortening ID is detected during playback. When the shortening ID cancel key is closed, the playback mode is continued without skipping, the subcode information sent from the subcode discrimination section is read, and the start ID of the user data is output from the subcode decoder. 1. A digital playback device, characterized in that the shortening ID is set corresponding to the shortening ID, and the shortening ID is always set to be absent, and the digital playback device is controlled to output a digital output signal.