JP2002133835A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably record and store only a desired part by retroactive recording in a recording device which performs retroactive recording without increasing a memory capacity. SOLUTION: After retroactive recording is completed, the recording is reproduced from a recording medium 50 as reproduction for editing by a reproducing part 23. Then, when designation for a storage starting position is received from an input operation part 27 and inputted into a microcomputer 28, a microcomputer 28 and a recording part 22 erase data from a retroactive recording starting position to a storage starting position from the recording medium 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording input data on a recordable / reproducible recording medium such as an optical disk.

[0002]

2. Description of the Related Art Digital recording apparatuses for digitally recording input data on a recordable / reproducible recording medium such as an optical disk have been developed.

[0003] Such a digital recording apparatus has a function capable of coping with a case where the source of data desired to be recorded is such as a broadcast program that flows randomly one after another. .

[0004] In the case of a broadcast program, it is difficult to know in advance at what timing data to be recorded is input. Recording is started from the data, and unnecessary unnecessary data at the beginning can be easily cut off at the time of completion of the recording.

[0005] A mini-disk (MD), which is one of the magneto-optical disks, is a package medium for music that can be recorded and reproduced, and has a small sound or a masking effect (frequency components near loud sounds that cannot be heard by human ears). ATRAC (Adaptive TRansfo) that removes the sound that works
Using an audio compression technique called "rm Acoustic Coding", the signal is recorded in a state where the signal amount is compressed to about one fifth of the original amount.

In recent years, individual users have been actively recording desired music on the mini-disc (MD). Minidiscs (MDs) are convenient for creating personal music libraries.

Now, suppose that the audio signal to be recorded is music. When the original is a CD (compact disc) or the like, only the music is reproduced and output, and a plurality of music are sorted and reproduced and output.
There is no particular problem when recording from such a source, but it flows randomly from source to source, such as a radio broadcast program, where music, announcer's voice and commercials are mixed. As is well known, it is difficult to record only the music portion with good timing when recording such music. However, when you think it's a song to be recorded, it's already too late, and it's easy for anyone to experience recording from the middle.

Therefore, recently, a digital recording device (audio recording device) equipped with a retrospective recording function has been developed. This will be described below. FIG. 3 is a block diagram showing an electrical configuration of a digital recording device (audio recording device) having a retrospective recording function according to the related art.
Data compression unit 31 for compressing and recording audio data
7 is required, and a data decompression unit 326 is required to reproduce the compressed data.

First, the operation in the reproduction mode will be described. The flow of signals and data in the reproduction mode is indicated by paths P1 and P
2, P3. The audio data picked up from the recording medium 350 which is a mini disk (MD) via the reproduction unit 323 is temporarily stored in the memory 318 via the amplification / servo circuit 324 and the signal processing unit 325. An output switching unit that reads data from the memory 318 by a FIFO (First In First Out) method, inputs the data to a data decompression unit 326 via a memory output control unit 320, decompresses the data there, and switches to the terminal b side. D / A (digital / analog) via 313
The reproduced sound is output from the speaker 316 via the converter 314 and the amplifier 315.

The data is temporarily stored in the memory 318 at the time of reproduction even if the audio data cannot be instantaneously read from the recording medium 350 which is a mini disk by the optical pickup due to the vibration of the reproduction unit 323. 3
This is to prevent “sound skipping” by temporarily storing the data in the memory 18 and continuously reading it out.

Next, the operation in the recording mode will be described. The flows of signals and data in the recording standby state in the recording mode are indicated by paths R1, R2, R3, R4, and R5. The audio signal received by the radio receiver is input terminal 31
0 is input to an A / D (analog / digital) converter 311 and converted into digital audio data.
It branches into two via 2.

One of the branches (path R2) is connected to the D / A via an output switching unit 313 switched to the terminal a side.
The signal is input to the converter 314, converted to an analog audio signal by the D / A converter 314, amplified by the amplifier 315, and output from the speaker 316 as monitor audio.

The other (path R3) is a data compression unit 3
The data is compressed by the memory controller 31
9, and stored in the memory 318. Memory 3
The method of storing the compressed audio data for the unit 18 is to store the audio data per unit time in units of audio data in association with the time data. When the memory is full, the oldest data is discarded and new data is written. It goes.

In a recording standby state, an input audio signal from a radio broadcast or the like is transmitted to a speaker 316.
At the same time as being output as a monitor sound, the corresponding compressed sound data is stored in the memory 318. In the recording standby state, the output switching unit 321 in the memory output control unit 320 is in the OFF state, and the memory 31
8, no compressed audio data is output to the recording unit 322.
Therefore, recording on the recording medium 350, which is a minidisk, is not performed. The user measures the timing to be recorded while listening to the monitor sound output from the speaker 316.

In the recording standby state, the A / D converter 311, as shown in FIG.
B, C,... ”(401) are input in chronological order, and a monitor sound by the same input sound signal sequence is output from the speaker 3.
16 is output. At the same time, it is assumed that a compressed audio data string “a, b, c,...” (402) is stored in the memory 318 corresponding to the time. The user listens to the monitor sound output from the speaker 316 in real time, and air-checks whether or not the song is a song to be recorded.

Now, it is assumed that the monitor sound based on the input sound signal “M” has just been output from the speaker 316. Then, the input audio signal “N” is input at the next timing, and the monitor audio based on the input audio signal is output to the speaker 3.
It is assumed that the user determines that the music is to be recorded around the time when the music is output from the computer 16 and gives a retroactive recording command to the microcomputer 328 through a key operation for starting recording on the input operation unit 327. This timing is t9
Set to 0.

The flow of signals and data after the key operation for retroactive recording in the input operation unit 327 is performed is indicated by a route R5 in FIG. The microcomputer 328
A read command is given to the memory controller 319, and the output switching section 321 in the memory output control section 320 is switched to the ON state. The memory controller 319 sets a timing t80, which is a predetermined retroactive time τ0 from the timing t90 on the memory 318, on the memory 318 as a retroactive reading start timing.
Execute retroactive read control. This timing t80
Corresponds to, for example, compressed audio data “d” as audio data on the memory 318. Therefore, the memory 318
From the compressed audio data string "d, e, f, g, h, i,
j, k,... ”are sequentially read out, and are recorded as compressed audio data strings 403 from the output switching unit 321 in the memory output control unit 320 via the recording unit 322 on the recording medium 350 as a mini disk. .

As described above, the memory 318 used for sound skip guard in reproduction is used for the above-mentioned retroactive recording, that is, "retrospective recording". If the retrospective recording function is not provided, it becomes very difficult to record various songs that flow in real time in a radio broadcast music program received by a radio receiver with good timing. In other words, the recording opportunity is missed, and the tune to be recorded cannot be recorded in a state including the head portion, and even if the recording is started in a hurry, the tune is recorded from the middle of the tune. However, if you have the function of retroactive recording as described above, even if the song you want to record is playing and you notice it, it will not be delayed within a certain time and the recording will be performed retroactively, so that song It is possible to record in a state including the head portion of.

As described in Japanese Patent Application Laid-Open No. 2000-207838, before recording on the recording medium 350, data for the retrospective time τ0 previously recorded in the memory 318 is retroactively reproduced to request recording. A method of designating the head of the data portion and actually starting recording on the recording medium 350 from that position has also been devised.

[0020]

In the above-mentioned prior art, the compressed voice data string "d, e, f, g, h" is stored in the memory 318 by the start of the retroactive reading based on the key operation of the retroactive reading from the input operation unit 327. , I, j, k, ... "
Are sequentially recorded on the recording medium 350. Although the compressed audio data sequence 402 includes the head of the music desired to be recorded, the head of the recorded audio data is the same as the head of the music. Not. In other words, the retrospective time τ0 is set in consideration of the margin so that it is not missed, so that another song, voice, or commercial that was playing immediately before the song you want to record in the radio broadcast is mixed Often happens. The music desired to be recorded is a compressed audio data string "h, i, j, k, ..." (403b)
And another content immediately before that is a compressed audio data sequence "d,
e, f, g "(403a). Since the compressed audio data sequence “d, e, f, g” is unnecessary for the user, after the end of a series of recording operations for the radio broadcast, the unnecessary compressed audio data sequence “d, e” is edited. , F, g "must be removed from the recording medium 350.

As an editing operation for the removal, the compressed audio data string “d, e, f,
g) and the compressed audio data string “h, i, j, k,...”, and the divided compressed audio data string “d, e, f, g” are erased. Work is needed.

First, the recording medium 350 is set according to the reproduction mode.
From the compressed voice data sequence "d, e, f, g, h, i, j,
k,... ”, and unnecessary compressed audio data strings“ d,
The boundary between the end of the last audio data “g” of “e, f, g” and the beginning of the first audio data “h” of the compressed audio data sequence “h, i, j, k,. Check accurately by ear. It is generally difficult to perform this check and division operation at once. Therefore, the boundary is checked at the first playback, then the playback is performed again, and while relying on the memory of the timing in the flow of the checked music, the subtle time adjustment is performed with a jog dial or the like, and the division boundary is just adjusted. , And finally perform a divide. Then, after the division, erasing is performed. However, since it is necessary to leave the one to be deleted and to erase the one to be erased, replay it again, paying sufficient attention, Of the compressed voice data sequence "d, e,
f, g "is checked very carefully and then erased. Such an operation is necessary in order to erase an unnecessary portion before the music, which is generated in the retrospective recording, and to record only the portion to be preserved on the disc.

As described above, division and elimination (e) of unnecessary portions in front of a piece of music, which occur in retroactive recording.
The operation of “rase” is very likely to cause an erroneous operation, and there is a high possibility that a part or all of the content to be saved is mistakenly erased.

In the technique disclosed in Japanese Patent Application Laid-Open No. 2000-207838, the recording start is specified at the exact beginning of the music at the stage where nothing has been recorded on the disk yet. After recording, no extra part is recorded before the song. However, in the case of this technique, when the memory 318 becomes full at the time of the retroactive recording start operation, the oldest data is deleted, so that the leading data is gradually deleted. Therefore, it is necessary to complete the retroactive recording start operation within the time of several seconds to several tens of seconds that can be recorded in the memory 318. For this reason, the operation must be completed in a short time, and it is difficult to repeat the retrospective reproduction many times in order to measure an accurate timing. The above time can be extended by increasing the capacity of the memory 318, but there is a problem that the cost of the memory increases.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a recording apparatus capable of reliably recording and storing only a desired portion by retroactive recording without increasing the memory capacity. It is in.

[0026]

In order to solve the above-mentioned problems, a recording apparatus of the present invention always stores input data in a temporary storage unit, and when receiving an instruction to start retroactive recording, stores the input data in the temporary storage unit. In a recording device that records data stored on a medium, after retroactive recording is completed, as retrofit for editing, data retroactively recorded on the medium is reproduced, and during the reproducing for editing, the storage start position is determined. An editing reproducing unit that receives designation, and a first-half erasing unit that erases, from the medium, a portion from the retroactive recording start position to the storage start position in the data retroactively recorded on the medium based on the designation of the storage start position. It is characterized by having.

With the above arrangement, after the retroactive recording is completed, the data is reproduced as the editing reproduction. When the storage start position is designated, the data from the retroactive recording start position to the storage start position is deleted from the medium.

Therefore, once the storage start position is determined,
The data from the retrospective recording start position to the storage start position, that is, the unnecessary portion generated due to the retrospective recording, can be securely erased from the medium without specifying whether to erase the previous part or the subsequent part. can do. It is not necessary to increase the memory capacity for that purpose. Therefore, only the desired portion can be reliably recorded and stored in the retrospective recording without increasing the memory capacity.

Further, in addition to the above configuration, the recording apparatus of the present invention, when receiving the designation of the storage start position during the editing reproduction, recognizes the storage start position as a temporary designation, Only part of the position before and after the position is reproduced as rehearsal reproduction, and the final designation of the storage start position is received during the rehearsal reproduction.

With the above arrangement, after the retroactive recording is completed, the data is reproduced as the editing reproduction. Then, the temporary designation of the storage start position is received first, and when it is received, only a part before and after the position is reproduced as rehearsal reproduction. Then, during the rehearsal playback, the final designation of the storage start position is received.

Therefore, after the retrospective recording is completed, when reproducing to specify the storage start position, it is not necessary to specify the exact position at one time, but the rough position is specified first, and the surrounding area is specified. During repeated playback, an accurate position can be determined. Therefore, in addition to the effect of the above configuration, the operation of specifying the storage start position becomes easier.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. Hereinafter, an audio recording device as a digital recording device (recording device) according to the present embodiment will be described in detail. This audio recording device may be built in the radio receiver or may be a device independent of the radio receiver or the like, and may be connected to the external input terminal (AUXIN) of the radio receiver or the like via a connection cable. It may be connected to an audio output terminal.

The audio recording apparatus according to the present embodiment has a function capable of coping with a case where the source of data desired to be recorded is such as a broadcast program that flows randomly one after another. are doing. It is difficult to know in advance when data to be recorded is input. Rather, this is what you want to record for the first time, knowing the content of the broadcast program that is playing. In other words, you do not know in advance whether you want to record. In such a case, it is difficult to perform the recording at a proper timing.

Therefore, in the digital recording apparatus according to the present embodiment, when digitally recording input data on a recording medium, the input data is always temporarily stored in a memory. This is so that the user can always retrieve it later. That is, while continuously input data is monitored and output, it is temporarily stored in the memory at the same time. While confirming the monitor output (air check), the user performs a retroactive recording start operation on the recording medium when it is determined that the content is desired to be recorded. With the operation of starting the retroactive recording, data is read from the memory after a predetermined period of time from the timing of the operation, and is recorded on the recording medium.

FIG. 1 is a block diagram showing an electrical configuration of a digital recording device (audio recording device) according to the present embodiment. As shown in FIG. 1, the input side of an A / D (analog / digital) converter 11 is connected to the input terminal 10 of the audio signal, and the output side of the A / D (digital / analog) converter 11 Connected to input side. Branch 1
2 has an output switching unit 1 of a changeover switch type.
3 terminal a. Terminal b of output switching unit 13
Is connected to the output side of the data decompression unit 26. The common terminal c of the output switching unit 13 is D / A (digital / analog)
The output side of the D / A converter 14 is connected to the input side of the amplifier 15, and the output side of the amplifier 15 is connected to the speaker 16.

The other output side of the branching unit 12 is connected to the input side of the data compression unit 17, and the output side of the data compression unit 17 is connected to the input side of a memory (temporary storage unit) 18.
The memory 18 is controlled by a memory controller 19. The output side of the memory 18 is connected to the input side of a data decompression unit 26 via a memory output control unit 20 and the input side of a recording unit (first half erasing unit) 22 via an output switching unit 21 of a switch type. Connected to the side. In the recording unit 22, the optical head and the magnetic head face a recording medium 50 which is a mini disk (MD) as a magneto-optical disk.

The output side of a reproducing section (editing reproducing section) 23 for reading data from the recording medium 50 is an amplification / servo circuit 24.
Is connected to the input side. The output side of the amplification / servo circuit 24 is connected to the input side of the signal processing unit 25. The output side of the signal processing unit 25 is connected to the input side of the memory 18 like the output side of the data compression unit 17.

An input operation unit (editing reproduction unit) 27 for transmitting an operator's instruction to a recording device by an input operation of a key, a button, or the like.
The output (instruction content) from the microcomputer enters a microcomputer (editing reproducing unit, first half erasing unit) 28, and the microcomputer 28 controls recording and reproducing processing in the memory 18 and the recording medium 50.

(1) Reproduction mode The operation at the time of reproduction is the same as that of the above-mentioned conventional example. The signal at the time of reproduction follows paths P1, P2, and P3. That is, the reproducing unit 23 sends the audio data from the recording medium 50 to the memory 18. The memory 18 writes new data while discarding old data. The compressed audio data read from the memory 18 is input to the data decompression unit 26 via the memory output control unit 20. Since the output switching unit 21 is in the OFF state, the compressed audio data is not output to the recording unit 22. The input compressed audio data is subjected to data expansion in the data expansion unit 26, and is input to the D / A converter 14 via the output switching unit 13 switched to the terminal b side. The signal is input to the speaker 16 via the amplifier 15, and the reproduced sound is output from the speaker 16.

Since the compressed audio data output from the signal processing unit 25 is not directly input to the data decompression unit 26, but is temporarily input to the memory 18 and temporarily stored therein, the compressed audio data memory 18 , And thus the input to the data decompression unit 26 is always continuous, and "sound skipping" is prevented.

(2) Retrospective recording mode (before starting retrospective recording
Next, the operation of the retroactive recording mode will be described. In FIG. 1, a signal / data flow in the recording mode is indicated by a route R.
1, R2, R3, R4, and R5. Input terminal 1
When the audio signal is input to the A / D converter 11, the data compression unit 17, the memory controller 19
Is active.

An input audio signal from a radio broadcast or the like is input from an input terminal 10 to an A / D converter 11, converted into digital audio data, and branched into two via a branching unit 12. The branched (R2) audio data is input to the D / A converter 14 via the terminal a of the output switching unit 13, converted into an analog audio signal by the D / A converter 14, and The signal is amplified and a monitor sound is output from the speaker 16.

The other (R3) audio data is data-compressed by the data compression unit 17, and is temporarily stored in the memory 18 in a state where the audio data per unit time is associated with time data.

As shown in FIG. 2, for a tune desired to be recorded, "H, I,
"H, i, j, k,..., Which are the compressed audio data strings 102 read from the memory 18 corresponding to" J, K,.
.. ", The compressed audio data" h "is the first audio data of the song. It is assumed that the compressed audio data “m” is audio data in the middle of the music. Note that, here, compressed audio data corresponding to an input audio signal represented by a capital letter “A” is generally represented by its lowercase letter, that is, “a”. All other input audio signals ("B", "C",
The same applies to ...). Then, it is assumed that the monitor sound based on the input sound signal “M” has just been output from the speaker 16.

Here, when the input audio signal "N" is input at the next timing and the monitor audio based on the input audio signal is going to be output from the speaker 16 (retrospective readout designation timing t30), the user can select this tune. Determines that recording is to be performed, and performs a key operation on the input operation unit 27 to start retroactive recording. However, this timing does not need to be so severe here, and may be in the middle of "M", in the middle of "N", or another timing.

When the user performs a key operation for starting retroactive recording on the input operation section 27, a retroactive recording command is given to the microcomputer 28. The microcomputer 28
The recording unit 22 is activated, and the output switching unit 21 in the memory output control unit 20 is switched to the ON state.

In the memory 18 when the memory is full, new data is written while discarding the oldest data. The memory controller 19 controls the memory 18 and reads out audio data including compressed past data from the memory 18. Then, as shown by the path R5, the read compressed audio data is output from the output switching unit 21 in the ON state in the memory output control unit 20 to the recording unit 22, and compressed by the optical head and the magnetic head of the recording unit 22. Audio data is recorded on the recording medium 50 which is a mini-disc.

In this recording operation, the input audio signal is output as monitor audio from the speaker 16 (paths R1 and R2), and at the same time, the corresponding audio data is retroactively recorded on the recording medium 50 in a compressed state. (Routes R1, R3, R4, R5). In this recording operation, the data decompression unit 26 is inactive and does not operate.

(3) Stopping Retroactive Recording Next, stopping the recording in the retroactive recording mode will be described.

At the moment when the user has finished listening to the monitor sound corresponding to the final sound data (not shown) of the music desired to be recorded, the user operates the input operation unit 27 to stop recording.

Then, the microcomputer 28 switches the output switching section 21 of the memory output control section 20 to the OFF state and switches the recording section 22 to the inactive state. Therefore, the recording operation for the recording unit 22 is stopped immediately after the final compressed audio data is recorded. At the same time or immediately thereafter, the microcomputer 28 shifts to the edit mode. After the recording is stopped, the mode can be shifted to the edit mode based on a user's explicit instruction, such as pressing a button for shifting to the edit mode.

(4) Edit Mode Next, the operation of the edit mode after the retroactive recording mode is stopped will be described.

(4-1) Editing Reproduction State First, the flow of signals and data in the editing operation key input waiting state in the editing mode is the same as the path P1, P2,
P3. That is, when a key operation for stopping recording is performed by the input operation unit 27 at the time of retroactive recording, a retroactive recording stop instruction and an edit mode selection instruction are given to the microcomputer 28, and the microcomputer 28 inactivates the recording unit 22 and The output switching unit 21 in the output control unit 20 is switched to the OFF state.

Then, the microcomputer 28 starts the reproduction for editing as follows. That is, the microcomputer 28 reads out a signal recorded from a predetermined position of the recording medium 50 by the reproducing unit 23 and the amplification / servo circuit 24 in order to perform reproduction from the retroactive recording start position recorded on the recording medium 50, The signal processor 25 demodulates the compressed data. The reproduced compressed data demodulated by the signal processing unit 25 is sent to the memory
Writing and reading are performed first in first out. The data read from the memory 18 is stored in the memory output control unit 2
0, the data is input to the data decompression unit 26 and decompressed.
Further, the microcomputer 28 includes the data decompression unit 2
6 is connected to the D / A converter 14 so that the output switching unit 1
3 is switched to the terminal b side. As a result, the expanded data is converted into an analog audio signal by the D / A converter 14, amplified by the amplifier 15, and the reproduced audio is output from the speaker 16.

In the editing reproduction, the microcomputer 28 reads the position (sector) data on the recording medium 50 at the retrospective read designation timing t30 from the signal processing unit 25. Then, the microcomputer 28 controls the start of editing reproduction on the recording medium 50, using the retroactive reading start timing t10, which is a predetermined retroactive time τ0 from the retroactive reading designation timing t30, as the editing reproduction start timing. . The retroactive read start timing t10 corresponds to, for example, compressed audio data “d” as audio data on the recording medium 50. Therefore, the compressed audio data sequence "d, e, f, g, h, i, j, k, ..." is sequentially reproduced from the recording medium 50.

(4-2) Determining the Storage Start Position In the state of waiting for the input of the editing operation, “D ′, E ′, F ′,
... Are output in chronological order, and the user listens to the output reproduced sound and measures the timing to start recording and saving. Note that, here, the expanded audio data corresponding to the input audio signal represented by “D” is generally represented by “D ′” with an apostrophe attached. The same applies to all other input audio signals (“E”, “F”,...). That is, the user listens to the reproduced sound reproduced from the memory 18 and output from the speaker 16 and determines at what timing the final recording / storage start command should be issued. Voice data "D '", "E'", "F '",
Until "G '", it is another song, voice, commercial, etc. immediately before the song desired to be recorded, and the user carefully measures the timing so as not to leave an unnecessary signal.

At the point in time when the sound based on the sound data “F ′” has just been output from the speaker 16, the user recognizes that the end of the unnecessary sound data portion is about to end. Next, it is assumed that the reproduced sound by the sound data “G ′” has just been output from the speaker 16.
Then, when the audio data “H ′” is input at the next timing, and the reproduced audio based on the audio data is output from the speaker 16, the user determines that the recording should be left from this position, and An editing key operation is performed on the operation unit 27.

If there is no command for editing key operation, retroactive reading start position (“d”, t10) on the recording medium 50
From the point where the retroactive recording command was issued ("m", t30).

(4-3) Rehearsal Playback State When there is a command for key operation for editing, under the control of the microcomputer 28, a certain amount of time before and after the position where this key operation was performed (near immediately after "G '"). The section is rehearsed and played. The certain sections before and after this are predetermined in this audio device. Also, the user may be allowed to make any changes.

In this rehearsal reproduction, the microcomputer 28 stores the compressed audio data path P2, which corresponds to the above-mentioned fixed section before and after (for example, “f, g, h, i”) stored in the memory 18, By controlling the reproduction through P3, it is possible to make the user aware of any difference between before and after, with the location where the editing key operation was performed as a boundary. For example, a display indicating a “start position” may be displayed on a display unit (not shown) such as a liquid crystal display on the audio device when the boundary is exceeded. Further, the sound may be small before the boundary and large when the sound exceeds the boundary.

(4-4) Confirmation Operation In this rehearsal playback, the user outputs a playback sound corresponding to the input sound signal “G” from the speaker 16 and ends the timing (the next input sound signal “H”). If the user can confirm with eyes or ears that the above boundary has come well just before the timing at which the reproduced sound corresponding to is output, the final recording start position is determined by the input operation unit 27. An instruction to determine the recording start position (recording start position) is given to the microcomputer 28 through the key operation for confirmation. The timing corresponding to the head of the music piece to be recorded and stored in the expanded audio data sequence 104 is referred to as a recording head designation timing t20.

Then, “divide” and “first half erasure” are performed by the microcomputer 28 via the route R5. That is, data indicating the erasure of data from the retroactive recording start position to the recording storage start position is written to a predetermined position on the recording medium 50, whereby unnecessary compressed audio data “d, e, f” is written from the recording medium 50. ,
g "is deleted. As a result, the compressed audio data string 105 (“h, i,
j, k,...

In parallel with this, the expanded audio data string “H ′, I ′, J ′, K ′,.
Is reproduced continuously. The user weighs the timing of the key operation for starting recording and saving that he / she finally performed and the flow of the time-series reproduced sound output from the speaker 16 to determine whether the timing of the operation was correct. Can be confirmed.

When a predetermined time has passed without a command for finalizing the key operation, the microcomputer 28 controls the retroactive reading designation timing t3 on the recording medium 50.
From the retroactive reading start timing t10 which is a predetermined retroactive time τ0 from 0, the position (t3
Repeat until 0), and wait for the editing key operation, that is, the input of the recording / storage start position again. The microcomputer 28 can include a counter (not shown) that measures the above-mentioned fixed time.

When the editing key operation is performed again during the rehearsal playback without performing the final key operation, the position where the editing key operation is performed is used as a reference of the recording / storing start position. Rehearsal playback is performed before and after that as described above.

As described above, after the user stops the retroactive recording, only by designating the recording storage start position, the microcomputer 28 erases the data before the recording storage start position among the recorded data. It is supposed to be.

That is, when a key operation for stopping recording is performed to end the recording, the microcomputer 28 automatically starts reproduction from the position on the recording medium 50 where retroactive recording has started. The user checks the playback output,
Check the beginning of the content you want to keep. Since the confirmation of the content is the second time, it is relatively easy to determine the correct timing with a margin. The user performs a key operation for editing at this timing, but when the operation is performed, the reproduction (rehearsal reproduction) is performed again from a position retroactive to the predetermined time from the position to a position passed for a predetermined time. If the editing key operation is performed again during the rehearsal reproduction, the position where the editing operation is performed is updated, and the rehearsal reproduction is repeated. If there is a final key operation during the rehearsal playback, the data from the position where the retroactive recording has been started to the position where the editing operation has been performed on the recording medium 50 is recorded.
Remove from Thereby, in the recording medium 50,
Unnecessary portions other than the contents desired to be recorded and stored are removed.

In other words, according to the digital recording apparatus for digitally recording input data on a recording medium according to the present embodiment, when a content desired to be recorded in real time from a radio broadcast or the like is found. Then, the content temporarily stored in the memory is read out, retroactive recording is started, and when the recording is stopped, the content is automatically reproduced and output a plurality of times from the position where the retroactive recording was started. Therefore, the user can easily specify the place (timing) at which recording is desired and start recording other than the contents desired to be recorded and saved from the recording medium without performing complicated division / erasing operations as in the related art. Unnecessary parts can be removed. As described above, according to the present embodiment, it is troublesome and time-consuming to perform division (divide).
The editing work of e) and erasing can be significantly simplified, and only the data of the contents desired to be recorded and stored can be left very smoothly and smartly.

In the present embodiment, the recording medium 50 is a mini-disc (MD). However, the recording medium 50 may be a compact writable compact disc (CD) such as a CD-R or a DVD (Digital Versatile). Disk) −
R, MO (Magneto-Optical) disk, hard disk, floppy (registered trademark) disk, or the like may be used. Further, a memory card composed of a semiconductor memory may be used.

Further, the digital recording device according to the present invention
This is particularly suitable when the data stored in the memory and recorded on the recording medium is compressed data, and when applied to an audio recording device that is audio data. However, the data to be recorded does not necessarily have to be compressed data. Further, the data to be recorded is not limited to audio data, but may be video data. Video data may be video-only data or mixed data of video and audio.

Although the case of recording audio by broadcasting such as radio has been described as an example, the present invention can also be applied to the case of recording a real voice at a conference or the like.

The digital recording device according to the present invention
A digital recording device for digitally recording input data on a recording medium, wherein the input data is stored in a memory before the recording, and is read from the beginning of the memory when a recording start operation is performed. In a device for recording data on a recording medium, reproduction is automatically started from a recording start position when a recording stop operation is performed, and further, when an editing operation is performed during the reproduction, the position of the position is changed. It may be configured such that the reproduction of the preceding and following fixed sections is repeated, and when a confirmation operation is performed in this reproduction section, the recording data from the recording start position to the position where the editing operation is performed is deleted.

The retrospective recording function makes it possible to record various songs flowing in real time in a radio broadcast music program received by a radio receiver in a timely manner without missing an opportunity. In this case, the retroactive time τ0 is
In order to be able to record the music to be recorded in a state that includes the head portion of the music, the size of the music piece should be set large with allowance. As a result, the reproduced sound from the memory in the retroactive recording mode includes a temporary portion of unnecessary audio data that is not intended to be recorded. However, according to the present invention, after the retroactive recording is stopped, the unnecessary audio data portion can be removed from the recording medium at an appropriate timing, and only the portion to be recorded and stored can be left. Therefore, the cumbersome editing work of dividing and erasing after completion of a series of recording operations of a radio broadcast, which has been unavoidably performed, can be greatly simplified, and the unnecessary audio data portion can be extremely efficiently removed. Can be deleted.

[0074]

As described above, after the retroactive recording is completed, the recording apparatus of the present invention reproduces the data retroactively recorded on the medium as the reproduction for editing, and stores the storage start position during the reproduction for editing. The first half of erasing the portion from the retroactive recording start position to the storage start position of the data retroactively recorded on the medium based on the specification of the storage start position, based on the designation of the storage start position And a unit.

As a result, once the storage start position is determined,
Unnecessary portions can be reliably erased from the medium. Therefore, it is possible to reliably record and store only a desired portion by retroactive recording without increasing the memory capacity.

Further, in addition to the above configuration, the recording apparatus of the present invention, when receiving the designation of the storage start position during the editing playback, recognizes the storage start position as the temporary designation, and Only a part before and after the position is reproduced as rehearsal reproduction, and the final designation of the storage start position is received during the rehearsal reproduction.

As a result, it is not necessary to specify the exact position at one time when reproducing to specify the storage start position. Therefore, in addition to the effect of the above configuration, there is an effect that the operation of specifying the storage start position becomes easier.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an electrical configuration and a retrospective recording operation of a digital recording device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation of retroactive recording.

FIG. 3 is a block diagram showing an electrical configuration and a retrospective recording operation of a conventional digital recording device.

FIG. 4 is an explanatory diagram showing a retrospective recording operation of a conventional digital recording device.

[Explanation of symbols]

Reference Signs List 10 input terminal 11 A / D converter 12 branch unit 13 output switching unit 14 D / A converter 15 amplifier 16 speaker 17 data compression unit 18 memory (temporary storage unit) 19 memory controller 20 memory output control unit 21 output switching unit 22 Recording section (first half erasing section) 23 Reproduction section (editing reproduction section) 24 Amplification / servo circuit 25 Signal processing section 26 Data decompression section 27 Input operation section (editing reproduction section) 28 Microcomputer (editing reproduction section, first half erasure) Part) 50 recording medium 101 input audio signal sequence 102 compressed audio data sequence 104 audio data sequence 105 compressed audio data sequence A, B, C, D, E, F, G, H, I, J, K, M, N
Input audio signals D ', E', F ', G', H ', I', J ', K',
M 'audio data a, b, c, d, e, f, g, h, i, j, k, m, n
Compressed audio data t10 Retrospective read start timing t20 Recording head designation timing t30 Retrospective read designation timing τ0 Retrospective time

Claims (2)

[Claims] 1. A recording apparatus for constantly storing input data in a temporary storage unit and receiving an instruction to start retroactive recording, the recording device recording the data stored in the temporary storage unit on a medium, wherein the retroactive recording is performed. After completion, as an editing playback, an editing playback unit that plays back data recorded retroactively on the medium and receives a designation of a storage start position during the editing playback, A recording device, comprising: a first half erasing unit for erasing, from the medium, a portion from the retroactive recording start position to the storage start position in the above-described retroactively recorded data. 2. When the editing playback unit receives a designation of a storage start position during the editing playback, it recognizes it as a temporary designation and plays back only a part of the location before and after that position as rehearsal playback. 2. The recording apparatus according to claim 1, wherein a final designation of a storage start position is received during the rehearsal reproduction.