JPH06139652A - Device for reproducing signal - Google Patents

Abstract

PURPOSE:To retrieve an optional program with a date and a time different from each other at a recording time by using calender information in a sub data part and retrieving date information on a recording medium andetecting a discontinuous point in the retrieved date information. CONSTITUTION:An operational input signal from a key switch 2 is sent to a main CPU 4 through a display processing circuit 3 when a program searching key is depressed several times. By the main CPU 4, the date dad ta of the calender information in the sub code part in sub data part areas ARSB1 and ARSB2 is retrieved, and the discontinuous point in the date data in the calender information being before, or after by the number of times when the program searching key is depressed than a present reproducing position is detected, and the discontinuous point is made a reproduction start position on the magnetic tape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal reproducing apparatus for scanning a recording track recorded on a recording medium to reproduce a signal.

[0002]

2. Description of the Related Art A rotary head type digital audio tape recorder (so-called R-DAT), a compact disc player (CD player) or the like is used as a signal reproducing device for scanning a recording track recorded on a recording medium to reproduce a signal. Extant. For example, this R-DAT reproduces a digital audio signal of a recording track obliquely recorded on a magnetic tape by using a rotary head.

The recording track TR on the magnetic tape is
As shown in FIG. 4, a digital audio signal is provided at the center.
Main data area AR formed by the data of
_PCMAnd has a main data area AR_PCMTiger before and after
First and second ATF recording areas AR for locking control
_ATF1And AR_ATF2And further has the above ATF recording area A
R _ATF1, AR_ATF2First and second sub-data section before and after
Area AR_SB1And AR_SB2Depending on the format with
Has been formed.

The main data part area AR _PCM is _divided into a main data part and a sub-code part. Digital audio signal data is recorded in the main data part, and the sub-code part contains the contents of the main data part. Data such as the sampling frequency, the number of channels, and the track pitch, which are indispensable for reproducing, are recorded.

[0005] The ATF recording area AR _ATF1 and AR _ATF2
Has a tracking signal recorded therein, and the rotary head itself determines the head position by detecting the tracking signal during signal reproduction.

The first and second sub-data section areas AR _SB1 and AR _SB2 are also divided into two sections, a sub-data section and a sub-code section. In the sub-data section in the sub-data section area, the main data section area AR _PCM
The calendar information indicating the date (that is, year, month, day) and time (that is, hour, minute, second) when the was recorded, program time, absolute time, etc. are recorded. ID information necessary for reproducing the data in the main data portion, such as a start ID indicating the beginning of a song and a shortening ID indicating the beginning of an unnecessary portion of the tape, is recorded.

The ID information of the sub-code portion in the sub-data portion area is recorded by using a method of automatically recording the signal or a method of manually recording after the signal recording. That is, after recording the digital audio signal data of the main data part, the ID of the sub-code part is recorded.
Information can be recorded or erased. For example, during recording of a live broadcast, if there is narration or the like between songs, automatic recording of the start ID information in the subcode section may not work, so after recording the broadcast,
It is possible to manually record or erase the information in the subcode part.

The above signal reproducing apparatus is usually provided with a function of cuing the beginning of a song. A key for rewinding the magnetic tape to search for the beginning of the song and a fast forward of the magnetic tape for searching for the beginning of the song. There are two keys, a key. The two cue keys are so-called AMS (automatic music sensor) keys, skip keys (skip music selection keys), and jump keys (interlaced music selection keys).

The cue key is searched for a start ID recorded before or after the current reproduction position on the recording medium by the number of times the key has been pressed, and the start of the song including the detected start ID is searched. There is a function to set the playback start position to search for songs at high speed in a short time.

When performing the above-mentioned cueing function, it is necessary to read the start ID on the magnetic tape without fail.
When a rotary head is used as in R-DAT, the rotary head intermittently contacts the magnetic tape, so that an unreadable area occurs in the subcode portion in the subdata portion area. Further, when the magnetic tape is rewound, the number of rotations of the drum slows down, so that a period in which the start ID on the magnetic tape cannot be read occurs. The start ID is recorded over an area for 9 seconds, that is, an area longer than the time during which the rotary head cannot read, so that the start ID can be read reliably.

Further, in order to maintain compatibility between the devices of the ID information of the subcode on the R-DAT and to efficiently record or rewrite the above-mentioned ID information, the song in which the start ID is recorded is recorded. There is a standard required to record only the first 9 seconds. In the case of automatically recording the start ID information, a method of detecting the start ID generation timing from the outside, such as digital input or synchronized input, and recording, or 2-3 seconds or more from the recording level A method is used in which it is detected that the level has dropped below a certain level (a level close to silence), and recording is performed when the recording level next rises.

[0012]

However, in the conventional signal reproducing apparatus, a program composed of a plurality of songs is recorded in one recording medium for a plurality of programs, and it is necessary to search for each program. However, the search function using the cue key searches all songs regardless of the program, and is still insufficient in terms of usability.

Further, as described above, one of the automatic recording methods of the start ID, it is detected that the recording level falls below a certain level for a few seconds or more (a level close to silence), and the next recording is performed. If the recording method is used when the level is raised, the start ID is not recorded when the recording is started. Therefore, it becomes difficult to search for the recording start point after recording.

Furthermore, when the start ID is manually recorded, if the start ID is recorded for a time shorter than 9 seconds, which is the recording time of the start ID, the start ID becomes incomplete. Occasionally, it is impossible to detect.

In view of the above situation, the present invention searches the date information on the recording medium by using the calendar information in the sub-data section and detects the discontinuity of the searched date information. This discontinuity is the playback start position,
It is an object of the present invention to provide a signal reproducing device which can improve the usability for the user.

[0016]

In the signal reproducing apparatus according to the present invention, the cue key is operated, the date information on the recording medium is searched in response to the operation, and the searched date information is discontinuous. The problems described above are solved by detecting points. A dedicated key may be provided as the cue key, but the cue key provided in the conventional signal reproducing apparatus may be diverted to perform the above-described means.

[0017]

According to the present invention, it is possible to quickly search for an arbitrary program having a different recording date or time.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a preferred embodiment of the present invention, an application to an R-DAT (rotary head type digital audio tape recorder) will be described below with reference to FIG. In FIG. 1, during signal reproduction, an operation input signal input from the remote sensor 1 or the key switch 2 is transmitted via the display processing circuit 3 to the main C
It is sent to PU4. In the main CPU 4, after processing the operation input signal, the motor driving circuit 5 is controlled to drive the motor 6 to rotate the drum 7.

The recording signal on the magnetic tape is read by the rotation of the drum 7 and is transmitted to the PC via the RF signal amplifier 8.
It is sent to the M signal processing circuit 9. Here, the reproduced signal is demodulated, sent to the D / A (digital / analog) converter 14 via the fader 10 and the digital filter 13, and converted into an analog signal. The stereo left channel signal in the analog signal is output from the output signal terminal 17 via the LPF (low pass filter) 15 and the amplifier 16. The stereo right channel signal from the D / A (digital / analog) signal converter 14 is also output from the output signal terminal 20 via the LPF (low pass filter) 18 and the amplifier 19 similarly to the stereo left channel signal.

At the time of reproducing the signal, the information of the sub-code portion is sent from the PCM signal processing circuit 9 to the display processing circuit 3 via the fader 10 and the meter circuit 11 to display the signal level on the display device 12, CPU
It is sent to the display processing circuit 3 via 4 and information such as the reproduction time is displayed on the display device 12.

The signal reproducing apparatus is provided with a date display key for switching to a year / month / day display mode or a time display mode and a cue key for cueing a song. When the signal reproduction device is switched to the year / month / day display mode and the cue key is pressed several times, the operation input signal from the key switch 2 is transmitted via the display processing circuit 3 to the main CPU 4 Sent to. In the main CPU 4, FIG.
The date data of the calendar information in the sub code portions of the sub data portion areas AR _SB1 and AR _SB2 of is searched, and the calendar information in the calendar information that is before or after the number of times the cue key is pressed from the current playback position is searched. A discontinuity point in the date data is detected, and this discontinuity point is set as the reproduction start position on the magnetic tape.

That is, when the signal on the magnetic tape is being reproduced and the mode is switched to the date display mode and the cue key is pressed,
When the magnetic tape is rewound or fast-forwarded from the playback position when the cue key is pressed to search the date / time data in the calendar information and a discontinuity in the date / time data is detected, it is automatically The playback mode is switched to and playback is started from this discontinuity point.

Further, even when the signal reproducing apparatus is switched to the time display mode, the time data in the calendar information is searched and the current reproduction position is searched, as in the operation in the date display mode. Thus, the discontinuity point of the time data in the calendar information before or after the number of times the cue key is pressed is detected, and this discontinuity point is set as the reproduction start position on the magnetic tape.

That is, similar to the operation in the year / month / day display mode, when the signal on the magnetic tape is reproduced, the mode is switched to the time display mode and the cue key is pressed, when the cue key is pressed. The magnetic tape is rewound or fast forwarded from the playback position of to search the time data in the calendar information,
When a discontinuity point of the time data is detected, the mode is automatically switched to the reproduction mode, and reproduction is started from this discontinuity point.

Also, a cue key for a dedicated music piece is provided, and the date key data or time data in the calendar information is searched by this dedicated key, and the cue key is pressed from the current playback position. It is also possible to detect a discontinuity point in the data that is before or after the number of times and use this discontinuity point as the reproduction start position on the magnetic tape.

A signal is reproduced from a new reproduction start position on the magnetic tape, and the PCM signal is transmitted via the RF signal amplifier 8.
After being sent to the signal processing circuit 9 and converted into a signal, as described above, it is output from the output signal terminal 17 of the stereo left channel and the output signal terminal 20 of the stereo right channel.

FIG. 2 is a diagram showing the recording state of the start ID and calendar information in the subcode part. The normal recording format on the magnetic tape is as described above with reference to FIG. 4, and MA1, MA2, MA3, MB1, MB of FIG.
2 ((A) in FIG. 2) shows one recording unit of each song, and ID1, ID2, ID3, ID4, ID5 ((B) in FIG. 2) show the start ID of each of the above songs. . Information of the above ID1 to ID5 and the above song MA1
MA2, MA3, MB1, MB2 is a calendar information CAL1 indicating the date and time at which the recorded CAL2 (in FIG. 2 (C)), the sub-code in the sub data area AR _SB1 and AR _SB2 in FIG. 4 Included in the section.

The songs MA1, MA2 and MA3 are the programs PRA.
And the songs MB1 and MB2 are recorded as a program PRB that is discontinuous with the program PRA. As a result, there is a step between the calendar information CAL1 of the song MA3 and the calendar information CAL2 of the song MB1. .

FIG. 3 is a flow chart for explaining the operation in response to the cue key operation on the recording medium. When the cue key is pressed in step S1, the process proceeds to step S2, and it is determined whether or not the display on the signal reproducing device is the date display. If the display on the signal reproducing device is the date display, the process proceeds to step S3, and the year / month /
Is there a year / month / day display mode to display the day, or
Determine if it is in time display mode that displays minutes and seconds.
If it is not the date display in step S2, the operation proceeds to step S4, and the operation by the normal cue key, that is, the cue operation of the music is performed.

In step S3, if the mode is the year / month / day display mode, the process proceeds to step S5, and the date in the calendar information included in the sub code parts of the sub data part areas AR _SB1 and AR _SB2 in FIG. Search the date data,
After the discontinuity point of the date data is detected according to the number of times the cue key is pressed, the discontinuity point is set as the reproduction start position in step S6.

If the time display mode is set in step S3, the process proceeds to step S7, and as in the case of the date display mode, the sub data area AR of FIG.
_After searching the time data in the calendar information included in the sub-code part of _SB1 and AR _SB2 and detecting the discontinuity point of the time data according to the number of times the cue key is pressed, in step S6, the above discontinuity is detected. The point is the playback start position.

Although the present invention has been applied to the signal reproducing apparatus based on R-DAT in the above-mentioned embodiment, the present invention is not limited to this. For example, a digital audio disk reproducing apparatus or a video disk reproducing apparatus. Etc. can also be applied. Further, as the operation corresponding to the above-mentioned cue key operation, when the discontinuity point is detected, even if the discontinuity point is not automatically switched to the reproduction mode, the stop mode or the standby mode is performed at the discontinuity point. You may make it switch to a state.

[0033]

As is apparent from the above description, in the signal reproducing apparatus according to the present invention, the date information on the recording medium is searched and searched according to the operation of the cue key when the date is displayed. It is possible to detect a discontinuity point in the date information and use this discontinuity point as the reproduction start position. The date display has a year / month / day display mode in which the year / month / day is displayed and a time display mode in which the hour / minute / second is displayed.In either mode, the cue key operation must be performed. In the date display mode, the discontinuity point of the date data in the calendar information is detected, and in the time display mode, the discontinuity point of the time data in the calendar information is detected. Also,
When the date display key and the cue key provided on the conventional signal reproducing device are used, it is not necessary to newly install the key, and the cost of the device does not increase.

Also, by providing a dedicated key, the date information on the recording medium as described above is searched, the discontinuity point of the searched date information is detected, and this discontinuity point is detected. The reproduction start position can be set.

Further, although there was a case where the recording start point could not be retrieved during the automatic recording of the start ID, it can be surely retrieved by retrieving the date information. Since there is no restriction that the data must be recorded in the area for 9 seconds, it is possible to avoid making the search impossible.

[Brief description of drawings]

FIG. 1 is an R- as an example of a signal reproducing device according to the present invention.
It is a block diagram which shows schematic structure of DAT.

FIG. 2 is a diagram showing a recording state of calendar information on a recording medium.

FIG. 3 is a flowchart for explaining an operation according to a cue key operation.

FIG. 4 is a diagram showing a recording format on a recording medium.

[Explanation of symbols] 2 ... Key switch 3 ... Display processing circuit 4 ... Main CPU 7 ... Drum 9・ ・ ・ ・ ・ ・ ・ ・ PCM signal processing circuit 12 ・ ・ ・ ・ ・ ・ ・ ・ Display device

Claims (2)

[Claims] 1. A signal reproducing apparatus for reproducing a recording medium on which date information is recorded together with a signal, wherein the date information on the recording medium is searched according to an operation of a cue key, and the searched date is searched. A signal reproducing apparatus characterized by detecting a discontinuity point of information and setting this discontinuity point as a reproduction start position. 2. A magnetic tape is used as the recording medium,
2. The signal reproducing apparatus according to claim 1, wherein a recording track diagonally recorded on the magnetic tape is scanned by using a rotary magnetic head to reproduce a digital audio signal.