JP2001052423A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evade a recording mistake due to user's erroneous operation without wastefully using a recording medium and also to obtain recording result unnecessitating excessive editing work when the user's operation is properly performed. SOLUTION: In a digital signal recording/reproducing device for recording/ reproducing a digital signal to the recording medium allowing random access of the digital signal, a temporary storage means for temporarily storing the input signal, a recording means for recording the input signal stored in the temporary storage means, a recording start signal input means for instructing the start of recording of the input signal to the recording means, and an error notifying means for notifying that input of the record starting signal is erroneous, are provided, then the recording means is furnished with a control means for recording (S5) the input signal including the input signal which is stored in the temporary storage means before the record starting signal is inputted, to the recording medium, when the record starting signal is inputted (S1) and also the error is notified (S2) within the specified time by the error notifying means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for recording / reproducing a digital signal on / from a recording medium, and more particularly to a recording / reproducing apparatus which can avoid a recording error due to an erroneous operation by an operator.

[0002]

2. Description of the Related Art A digital signal recording / reproducing apparatus using a randomly accessible recording medium includes a mini-disc (hereinafter referred to as MD) recording / reproducing apparatus using an optical disk, and an IC recorder using an individual memory in recent years. There is. In these recording / reproducing devices, various operations such as reproduction from an arbitrary position, deletion of a recording signal in a predetermined section, and movement of a recording position can be easily performed by managing address information indicating a recording position. FIG. 5 is a diagram showing a conventional MD recording / reproducing apparatus. In the figure, 1 is an MD composed of an optical disk, 2 is a magnetic head for recording, 3 is a spindle motor for rotating and driving the MD, 4 is an optical pickup, 5 is a feed motor for driving the optical pickup, 6 is a servo drive circuit, The drive control of the spindle motor 3, the optical pickup 4, and the feed motor 5 is performed. Reference numeral 7 denotes a system controller that controls the entire MD recording / reproducing device, 8 denotes an input device operated by an operator, and 9 denotes a display device that displays an operation state of the MD recording / reproducing device.

[0003] Reference numeral 10 denotes a head drive circuit for driving the recording magnetic head 2, 11 denotes an RF amplifier, 12 denotes an encoder and decoder for recording and reproduction signals, 13 denotes a temporary storage memory,
Reference numeral 14 denotes a memory controller, and reference numeral 15 denotes an encoder and a decoder for audio compression and decompression. 16 is A for voice input
/ D (Analog / Digital) converter. Reference numeral 17 denotes a D / A (Digital / Analog) converter for audio output.

[0004] The input audio signal is an A / D for audio input.
The digital signal is converted by the converter 16 into a digital signal, and the digital signal input from the A / D converter 16 is subjected to audio compression by the encoder and decoder 15 for audio compression. The compression method used in MD recording / reproducing devices is AT
This is called an RAC (Adaptive Transform Acoustic Coding) method, and performs about one-fifth band compression on the original signal in consideration of human auditory characteristics. The compressed digital signal is processed by a recording signal encoder and decoder 12.
An error correction code is added, and modulation for recording on the optical disc 1 is performed. Since these processes are performed in a fixed data size unit, a DRAM (Dynamic Random Access
(Temporary Memory).

[0005] The recording method used for the MD is called magnetic field modulation overwriting, and an optical pickup 4 and a recording magnetic head 2 are arranged so as to sandwich the optical disk 1. During recording, the optical pickup 4 irradiates the optical disc 1 with a high-output laser beam. When a high-power laser beam is applied to the optical disc 1, the temperature of the irradiated portion of the optical disc 1 rises, and when it rises above the Curie temperature, the holding power of the magnetic film in this portion is lost. At this time, if a magnetic field of S pole or N pole is applied from the recording magnetic head 2 to the optical disc 1,
Only the portion of the magnetic film where the coercive force is lost due to the irradiation of the laser beam is magnetized. Since the optical disc 1 is rotating, when the laser beam passes through the magnetized portion, the temperature of the magnetized portion decreases, and the magnetized state is newly held as magnetic recording.

At the time of reproduction, a laser beam for reproduction is irradiated from the optical pickup 4. The irradiated laser light is reflected by the portion of the magnetic film. At this time, the polarization direction of the incident light is rotated and reflected by the Kerr effect. By detecting the rotation angle of the reflected light through a polarizing beam splitter and detecting the difference in the polarization direction of the light as the difference in the magnetization direction of the magnetic film, the recording signal can be read.

[0007] The read recording signal is amplified by an RF amplifier 11, and an encoder and decoder 12 for recording and reproducing signals are used.
To perform demodulation and error correction processing, and then store it in the temporary storage memory 13. The MD recording / reproducing device performs ATRAC audio compression as described above. In this method, the speed of reading data from the optical disk 1 is faster than the speed of reproducing the audio signal,
When the data is full, the reading is temporarily stopped and waits.

Since the reproduced signal is held by using the temporary storage memory 13 as described above, the reproduced signal may be affected by an external impact or the like.
Even when the servo of the optical pickup 4 is released, the data stored in the temporary storage memory 13 can be reproduced. Therefore, if the servo operation can be restored during the reproduction of the data, the reproduction can be performed continuously without interruption.

Next, a data management method of the MD recording / reproducing apparatus will be described. FIG. 6 is a diagram showing an example in which music numbers are collectively managed by a user TOC described later. LEAD as shown
Addresses are continuously assigned to recording tracks starting from IN and ending at LEAD OUT. Therefore, the optical pickup 4 traveling on the recording track can recognize the recording / reproducing position in real time with reference to the address. Also, the addresses of the recorded data are collectively managed in a user TOC area formed on the inner peripheral surface of the optical disc 1.

FIG. 6A is a diagram showing a recording track and a user TOC recorded thereon. As shown in the figure, the audio data of song number 1 is recorded from address A to B of the recording track, and song data 2 is recorded from address C to D.
, And the audio data of music number 3 is recorded from address E to F. Thereafter, recording is performed in the same manner, and audio data of music number 6 is recorded from address J to L.
A user TOC area is formed on the inner peripheral side of the optical disc. This area is a table area indicating the correspondence between the audio data and the music numbers assigned thereto, and as shown in the figure, the audio data and the music numbers assigned thereto are recorded in association with each other.

FIG. 6B is a diagram showing an example of erasing the tune of tune number 3 in the recording track shown in FIG. 6A. When deleting the song of the old song number 3 before editing, the old song numbers 4, 5, 6 are rewritten to the new song numbers 3, 4, 5 as shown in the figure. In this way, the MD recording / reproducing apparatus treats the old music number 3 as blank.

FIG. 6C is a diagram showing a case where the songs of the old song numbers 4 and 5 are combined into one song on the recording track shown in FIG. 6A. As shown in the figure,
5 as a new song number 4 and GJ as address
Assign. The old song number 6 is rewritten to the new song number 5. In this way, the MD recording / reproducing apparatus treats the new song number 4 as one piece of music composed of the old song numbers 4 and 5.

In the MD recording / reproducing apparatus, data management is performed by the user TOC in which the start address and end address of each data are recorded, and reproduction is performed based on the data. Further, erasing certain information or combining a plurality of pieces of information into one piece of information is also performed by changing the user TOC information.

[0014]

When recording a voice signal such as voice or music, some operation for starting the recording is required. Normally, recording is started by operating a recording button or the like. However, depending on the timing at which the recording button is operated, recording of a head portion of an audio signal may be missed.

In order to solve this problem, Japanese Patent Application Laid-Open No. 5-205394 has a temporary storage means for storing information before operating a recording button, and stores information before operating a recording button. This shows that recording is performed using information recorded in the storage means. But,
According to this method, even when the timing of operating the recording button is accurate, the information corresponding to the capacity stored in the temporary storage means is recorded, and after the recording is completed, the unnecessary part recorded at the top is recorded. Requires editing work to delete.

In order to end the recording, some operation for ending the recording is required. Normally, recording is ended by operating a recording end button or the like, but the user sometimes mistakenly recognizes that the audio signal has ended and operates the recording stop button. (For example, there is a case where silence occurs in music such as classical music, but music resumes after a while.) Such a problem can be avoided by recording with sufficient margin. (For example, if the user confirms that the next song has started, or listens to an announcement indicating the end of the song, and then operates the recording stop button, the desired song can be recorded without error.) However, when recording is performed with such a margin, an editing operation for deleting unnecessary portions after recording is completed is required.

The present invention has been made in view of the above problems, and provides a recording / reproducing apparatus which avoids a recording error due to a user's erroneous operation and does not require an extra editing operation when the user's operation is correct. I do.

[0018]

The present invention employs the following means in order to solve the above-mentioned problems.

In a digital signal recording / reproducing apparatus for recording / reproducing a digital signal on a recording medium which can be randomly accessed, a temporary storage means for temporarily storing an input signal, and a recording means for recording the input signal stored in the temporary storage means on a recording medium Means, recording start signal input means for instructing the recording means to start recording an input signal, and error reporting means for reporting that the input of the recording start signal is erroneous, wherein the recording means comprises: When a start signal is input, and when the error reporting unit reports an error within a predetermined time, an input signal including the input signal stored in the temporary storage unit before the recording start signal is input is transmitted to the recording medium. It is characterized by comprising control means for recording.

Further, in a recording / reproducing apparatus for recording / reproducing a digital signal on a recording medium which can be randomly accessed, a temporary storage means for temporarily storing an input signal, and a recording apparatus for recording the input signal stored in the temporary storage means on a recording medium. Means,
Recording start signal input means for instructing the recording means to start recording an input signal, and error reporting means for reporting that the input of the recording start signal is an error, the recording means,
When the recording start signal is input, and when the error reporting unit does not report an error within a predetermined time, the recording unit includes a control unit that records an input signal input from a point in time when the recording start signal is input to the recording medium. A recording / reproducing apparatus characterized by the above-mentioned.

Further, in the recording / reproducing apparatus, the sum of the storage capacity of the input signal stored in the temporary storage means before the recording start signal is input and the storage capacity stored in the temporary storage means within the predetermined time period Is smaller than the storage capacity of the temporary storage means.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing an appearance of an MD recording / reproducing apparatus according to the present embodiment. In the figure, reference numeral 80 denotes an optical disk recording / reproducing device; 81, a recording start button for inputting a recording start signal; 82, a cancel button operated when reporting an error in a recording start position;
Is a recording end button for inputting a recording end signal. In the figure, the same portions as those shown in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 2 is a time chart showing the operation of the MD recording / reproducing apparatus according to this embodiment when there is no error in the operation of the recording start button. FIG. 3 is a time chart showing the operation of the MD recording / reproducing apparatus according to the present embodiment when the recording start button is operated incorrectly. In these figures, (a) is an input signal,
(B) is audio data recorded on the optical disc 1. In the figure, the time a ₂ is the time of operating the recording start button 81, when a ₁ indicates a time than when a ₂ goes back the predetermined time tp. Point a ₃ shows the time when a predetermined time tj delay than the time a _2.

Further, in FIG. 2, between b ₂ -b ₄ audio data recorded on the optical disk 1 and b ₄ '-b between ₅ between the time a ₂ -a ₄ respectively input signal and a ₄ -a ₅ between 3 shows a recording signal of the first embodiment. In FIG. 3, between b _{1 and} b ₃ , b ₃ ′ −
Between b _{4 and} between b ₄ ′ and b _5, respectively, the time point a _{1 of the} input signal.
Between -a _3, indicating the recording signal between a ₃ between -a ₄ and a ₄ -a _5.

The predetermined time tp is a time required from when the user notices that an audio signal to be recorded is generated to when the recording start button 81 is operated, and the capacity of the temporary storage memory 13 of the recording / reproducing apparatus is reduced. Although it can be set as a limit, the capacity Mp of the total capacity Mt of the temporary storage memory 13 is assigned as the prerecord area capacity. Also,
For the predetermined time tj, the user operates the recording start button 81 after noticing that an audio signal to be recorded is generated, and then operates the cancel button 82 when the user notices that the operation is incorrect. It is time to be able to. During this time, the capacity Mj of the total capacity Mt of the temporary storage memory 13 is allocated as the judgment area capacity.

When the input signal (a) is recorded on the optical disc 1, the recording can be started even if the recording start button 81 is directly operated. However, the MD recording / reproducing apparatus performs focus control, tracking control of the optical pickup 4 and rotation control of the optical disc 1 during recording, further performs A / D conversion of an input signal, and performs audio compression, error correction, and modulation processing. Must be performed before recording on the optical disc 1. Therefore, the recording start button 81
There is a time lag between when the user operates and when the recording is actually started. Therefore, usually, first, in a recording standby state, the entire servo such as the focus control and tracking control of the optical pickup 4 and the rotation control of the optical disk 1 and the A / D conversion, audio compression, error correction, and modulation are performed. The processing circuit is operated. Specifically, the recording start button “REC” and the play button “PLA” shown in FIG.
By operating "Y" at the same time, the recording standby state is set. Then, when the recording is actually started, by operating the "PLAY" button again, the recording on the optical disc 1 without time delay becomes possible. In the recording standby state, processing such as voice compression processing is always performed, and the input signal is always recorded in the temporary storage memory 13. That is, when the recording start button 81 is operated, the input signal from the point in time that is earlier than the point in time when this operation was performed by a predetermined time is recorded in the temporary storage memory 13. Then, the MD recording / reproducing apparatus can control to continuously record the input signal from the point in time when the recording start button 81 is operated to the predetermined time earlier than the point in time when the recording start button 81 is operated.

The total capacity Mt, the pre-record area capacity Mp and the judgment area capacity Mj are:
The relational expression of Mt ≧ Mp + Mj holds. When the temporary storage memory total capacity Mt is distributed to the pre-record area capacity Mp and the judgment area capacity Mj, for example, if the pre-record area capacity Mp is used for recording important information that has only once, the pre-record area capacity Mp is increased. As will be described later, the amount of information that can be recorded after the user notices an error in the operation of the recording start button 81 is increased. Also, if the content is checked after the start of recording, and it is determined that the content is not necessary, if it is controlled not to record on the optical disk by an error report,
The judgment area capacity Mj is increased, and the time required for the judgment is sufficiently secured.

FIG. 4 is a flowchart showing the operation of the MD recording / reproducing apparatus according to this embodiment. Hereinafter, the operation of the MD recording / reproducing apparatus of the present embodiment will be described with reference to FIG.

First, the recording start button "REC" and the play button "PLAY" are simultaneously operated to enter a recording standby state.

In step S1, a recording start button 8
When operating the 1, stores the address a ₂ in the temporary storage memory 13 corresponds to the position where the recording start button 81 is operated. Thereafter, the input signals are sequentially recorded in the temporary storage memory. At this time, the input signal is not recorded on the optical disc 1.

In step S2, it is determined whether or not the user has operated the cancel button 82, noticing that the operation of the recording start button 81 is an erroneous operation. If the operation timing of the recording start button 81 is correct, the operator does not operate anything. In this case, the process proceeds to step S3. On the other hand, if the user operates the cancel button 82, the process proceeds to step S5.

In step S3, the predetermined time tj
It is determined whether (judgment time) has elapsed.
If the predetermined time tj has not elapsed, the process returns to step S2, and if not, the process proceeds to step S4.

In step S4, since the operation timing of the recording start button 81 operated by the user is correct, a time point a ₂ which is the operation timing of the recording start button 81 operated by the user as shown in FIG. Is recorded on an optical disk.

In step S2, if the operator determines that the operation timing of the recording start button 81 is not correct and operates the cancel button 82, the process proceeds to step S5.

In step S5, since the operation timing of the recording start button 81 operated by the user is not correct, the time a, which is the operation timing of the recording start button 81 operated by the user, as shown in FIG. a predetermined time tp point earlier a ₁ than _2, i.e., sequentially recorded on the optical disc 1 from the time period previous input signal corresponding to the pre-record area capacity.

In the MD recording / reproducing apparatus of this embodiment,
The input signal is stored in the temporary storage memory from a time that is earlier than the time when the recording start button is operated by a predetermined time. After the recording start button is operated, if the cancel button is operated within the judgment time, that is, if it is necessary to record the input signal stored in the temporary storage memory on the optical disc, the input signal is transmitted to the optical disc. It is recorded, and is not recorded when the cancel button is not operated within the judgment time, that is, when it is unnecessary to record the input signal on the optical disk.
Therefore, data that does not need to be recorded is not recorded on the optical disc, and the recording area can be efficiently recorded without wasting the recording area.

In the above description, the case where an optical disk is used as a random accessible recording medium and an audio signal is recorded has been described as an example. Can be recorded.

[0038]

As described above, according to the present invention, there is provided a recording / reproducing apparatus which avoids a recording error due to a user's erroneous operation and does not require any extra editing work when the user's operation is correct. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing an appearance of an MD recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a time chart showing an operation when there is no error in the operation of a recording start button.

FIG. 3 is a time chart showing an operation when an operation of a recording start button is erroneous.

FIG. 4 is a flowchart showing an operation of the MD recording / reproducing apparatus according to the embodiment.

FIG. 5 is a diagram showing a conventional MD recording / reproducing apparatus.

FIG. 6 is a diagram showing an example in which music numbers are collectively managed by the user TOC.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical disk (MD) 2 Recording magnetic head 3 Spindle motor 4 Optical pickup 5 Feed motor 6 Servo drive circuit 7 System controller 8 Input device 9 Display device 10 Head drive circuit 11 RF amplifier 12 Encoder and decoder for recording / reproduction signals 13 Temporary Storage memory 14 Memory controller 15 Encoder and decoder for audio compression / expansion 16 A / D converter 17 D / A converter 80 Optical disk recording / reproducing device 81 Recording start button 82 Cancel button 83 Recording end button

Claims (3)

[Claims] 1. A recording / reproducing apparatus for recording / reproducing a digital signal on / from a randomly accessible recording medium, comprising: a temporary storage means for temporarily storing an input signal; and a recording means for recording the input signal stored in the temporary storage means on a recording medium. Means, recording start signal input means for instructing the recording means to start recording an input signal, and error reporting means for reporting that the input of the recording start signal is erroneous, the recording means comprising: When a start signal is input, and when the error reporting unit reports an error within a predetermined time, an input signal including the input signal stored in the temporary storage unit before the recording start signal is input is transmitted to the recording medium. A recording / reproducing apparatus comprising a control unit for recording. 2. A recording / reproducing apparatus for recording / reproducing a digital signal on / from a randomly accessible recording medium, comprising: a temporary storage means for temporarily storing an input signal; and a recording means for recording the input signal stored in the temporary storage means on a recording medium. Means, recording start signal input means for instructing the recording means to start recording an input signal, and error reporting means for reporting that the input of the recording start signal is erroneous, the recording means comprising: When a start signal is input and the error reporting means does not report an error within a predetermined time,
A recording / reproducing apparatus comprising: a control unit that records an input signal input from a point in time when the recording start signal is input on the recording medium. 3. The storage device according to claim 1, wherein the storage capacity of the input signal stored in the temporary storage means before the recording start signal is input and the temporary storage within the predetermined time period. The recording / reproducing apparatus according to claim 1, wherein a sum of storage capacities stored in said means is equal to or less than a storage capacity of said temporary storage means.