JP2002358766A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording device which records digital data to a recording destination in accordance with a prescribed data compression system and permits checking of the residual recordable space corresponding to plural encoding systems without changing the setting of the data compression system. SOLUTION: Display screens A5 to A7 of the remaining time for a previously calculated stereo system, monaural system and ATRAC3-LP2 system as well as ATRAC3-LP4 change over at every key operation of a TIME key in accordance with the address data indicated by a P-FRA of a UTOC0 in an MD1 during loading.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus capable of recording digital data on a recording destination such as an MD.

[0002]

2. Description of the Related Art Recently, ATRAC (Adaptive Transform)
A variety of digital music data can be converted to MD (Mini Discharge) data based on multiple data compression methods such as Acoustic Coding.
A recording device capable of recording in c) has been put to practical use.

[0003] The ATRAC method is applied to digital music data for MD, and based on an psychoacoustic model, an MDCT (Modified Discrete Cosi
ne Transform) is a data compression technique for recording digital music data for a long time by allocating coefficients to adaptive bits (scalar quantization), and has a compression ratio of about 1/5.

The ATRAC system uses a standard recording mode (MDSP; MD Standard Play mod) for recording on an MD.
e) However, ATRAC3-LP2 which further improved this ATRAC system and realized twice the compression ratio, and ATRAC3-LP4 which can convert to twice the compression ratio were devised. (MDLP; MD Long Pl
ay mode). That is, the above A
Compared to the case of recording by MRAC according to the TRAC system, the use of the MDRAC of ATRAC3-LP2 enables twice as long stereo long recording as possible, and also the ATRA
When the MDLP of C3-LP4 is used, quadruple stereo long time recording is possible.

Therefore, when digital music data is recorded on an MD, the user must use the ATRAC3-LP2 system or the ATRAC system in addition to the stereo system or monaural system.
Any one of the 3-LP4 format is designated in advance, and the recording device records digital music data on the MD based on the designated format.

The recordable time of the MD differs depending on the data compression method. When the user checks the remaining recordable capacity of the MD (remaining recordable time), the remaining recordable capacity (recordable capacity) for a data compression scheme (for example, a stereo scheme or an ATRAC3-LP4 scheme) preset by the user. The remaining time is displayed on a display screen (not shown) of the recording device.

FIG. 6 shows a time display screen in the recording apparatus. As shown in FIG. 6, the time display screen C1 includes:
The time (hereinafter, referred to as single time) “0:00” elapsed from the start of the reproduction of the music of track number (TNO; Track NOmber) “01” is displayed, and the time display screen C2 displays the track number “ A time (hereinafter referred to as a single minus time) “-4: 22” required from the current time of the song “01” to the end of the reproduction is displayed.

Further, in FIG. 6, a time display screen C3 displays "0: 00T", which is the time elapsed from the start of reproduction of the MD to the current time (hereinafter, referred to as a total time), and a time display screen C4 displays The time required from the present time to the end of reproduction of the MD (hereinafter referred to as total minus time) “−48: 12T” is displayed, and the time display screen C5
Contains the MD for the currently set data compression method.
Recordable remaining time (hereinafter referred to as “remaining time”)
“25: 48R” is displayed.

As shown in FIG. 6, each of the time display screens C1 to C5 is sequentially switched every time a TIME key (not shown) for inputting a time display screen switching instruction is pressed.

[0010]

However, the above-mentioned conventional recording apparatus has the following problems. That is, when the user checks the remaining recording capacity of the MD (the remaining recording time), only the remaining recording capacity for the currently set data compression method is displayed. Therefore, in order to check the remaining recordable capacity of another data compression method that is not currently set, it is necessary to reset the data compression method each time, which is inconvenient.

For example, when the currently set data compression method is the monaural method, the remaining recordable amount of the MD that can be confirmed by the user is the remaining recordable amount for the monaural method, and the user can use the ATRAC3-LP2 method or the like. To check the remaining recordable capacity for other data compression methods, set the currently set data compression method (monaural method) to A.
The setting had to be changed to the TRAC3-LP2 mode or the like.

An object of the present invention is to provide a recording apparatus for recording digital data at a recording destination based on a predetermined data compression method without changing the setting of the data compression method without changing the setting of the data compression method. An object of the present invention is to provide a recording device capable of confirming a possible remaining amount.

[0013]

According to the first aspect of the present invention,
Designation means for designating an encoding method for encoding the recording data, and encoding means for encoding the recording data based on the encoding method designated by the designation means,
A recording unit that records the recording data encoded by the encoding unit at a predetermined recording destination; a calculating unit that calculates a recordable time of the recording destination that differs depending on the encoding method; and a calculation unit that calculates the recording time. Display means for displaying the set recordable time, wherein the calculating means calculates in advance the recordable times for the plurality of encoding schemes, and sequentially displays the recordable times on the display means. And a control means for performing the control.

[0014] Further, there is further provided input means for inputting an instruction to sequentially display the recordable time for the plurality of encoding schemes calculated by the calculation means on the display means, wherein the display means comprises the input means. Is controlled in accordance with an instruction input by the user.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an MD recording / reproducing apparatus 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a block diagram showing the internal configuration of an MD recording / reproducing device 100 to which the present invention has been applied.

As shown in FIG. 1, an MD recording / reproducing apparatus 10
0 is MD unit 110, MD ATRAC / DSP / LS
I120, A / D130, D / A140, input unit 15
0, a display unit 160, a microcomputer 170, etc.
It is provided with a spindle motor, a servo control circuit, an address decoder, and the like (not shown). Furthermore, MD1 becomes MD
It is assumed that it is loaded in an MD recording / reproducing unit (not shown) of the unit 110. Here, MD1 corresponds to the recording destination described in claim 1.

Here, the spindle motor is driven to rotate in response to a control signal from a servo control circuit, which will be described later, and rotates the MD1, and the thread is driven by the MD1 in response to a control signal from the servo control circuit. Optical head (not shown) described later in the radial direction and in the direction in which the MD 1 comes into contact with or separates from the MD 1
To move.

The servo control circuit includes a tracking error signal and a focus error signal output from an RF amplifier described later, a track jump command and an access command output from a microcomputer 170 described later, rotation speed detection data of the spindle motor, and the like. Accordingly, various servo drive signals are output to the spindle motor and the sled to perform focus control and tracking control, and the rotation speed of the MD1 by the spindle motor is maintained at a constant linear velocity.

In particular, the servo control circuit responds to a control signal from the microcomputer 170 by a magnetic head (not shown) described later.
Is output to a magnetic head driving unit (not shown), and the magnetic head disposed at a position facing the optical head with the MD1 interposed therebetween is moved in the radial direction of the MD1 and the MD.
1 is moved in the direction of coming and going.

The MD section 110 is an MD slot-in mechanism 1
10a, pickup unit 110b, RF amplifier 1
10c.

The MD slot-in mechanism 110a is an MD1
Is set in an MD recording / reproducing apparatus (not shown), and a mechanism for releasing the set MD1 from the MD recording / reproducing apparatus is provided.

The pickup unit 110b is an MD1
UTOC (User Table Of Contents) recorded in advance
An operation mechanism for operating the optical head for reading data, music data, and the like in accordance with a control signal from the microcomputer 170 is provided.

The optical head is an LD (Laser Diod).
e), each of which comprises a deflection beam splitter, an objective lens, a reflected light detector, etc. (all are not shown), and reflects the reflected light of the low-level laser light emitted from the LD to the MD1 being loaded onto the optical disk. Various data such as UTOC data and digital music data recorded in advance on the MD 1 are picked up by detecting the reflected light by the reflected light detector provided in the head.

Further, the pickup unit 110b includes:
The magnetic head for recording data output from the ATRAC / DSP / LSI 120 for MD, which will be described later, on the loaded MD1, and the radial direction of the MD1 and the direction of moving toward and away from the MD1 according to a control signal from the servo control circuit. And the magnetic head drive section for moving the magnetic head.

Here, the magnetic head microcomputer 170 provided in the pickup unit 110b has the same function as the recording means of the first aspect.

RF (Radio Frequency) amplifier 110c
Extracts various information such as a reproduction RF signal, a tracking error signal, a focus error signal, and absolute position data from the MD1 data read by the optical head, and outputs the extracted RF signal to the M1.
It outputs to the ATRAC / DSP / LSI for D120, outputs a tracking error signal and a focus error signal to the servo control circuit, and outputs absolute position data to the address decoder.

ATRAC / DSP / LSI for MD (Adap
tive Transform Acoustic Coding ・ Digital Signal Pro
cessor / Large Scale Integrated circuit) 120
It is a high-speed microprocessor dedicated to digital data processing, and includes digital music data input from a digital input terminal 10a and A / D input from an analog input terminal 10b.
The digital music data input through
TRAC, ATRAC3-LP2, or ATRAC3
-Based on the LP4 audio compression method, ATRAC encoding is performed, and EFM (Eight to Fourteen Modu
lation) modulation, CIRC (Cross Interleaved Reed-sol)
omon Code).

ATRAC / DSP / LSI 120 for MD
Outputs the ATRAC-encoded digital music data to the magnetic head of the pickup unit 110b as stereo or monaural data in response to an instruction signal from the microcomputer 170.

ATRAC / DSP / LSI 120 for MD
Performs decoding processing such as EFM demodulation and CIRC on the RF signal input from the RF amplifier 110c,
Referring to the UTOC data stored in the RAM 171,
ATRAC, ATRAC3-LP2, or ATRAC
3- Perform ATRAC decoding based on the LP4 audio compression method.

Here, ATRAC / DSP / LS for MD
I120 has the same function as the encoding means of the first aspect. In addition, the above monaural system, stereo system, ATR
The AC3-LP2 system and the ATRAC3-LP4 system correspond to the encoding system according to claim 1.

A / D (Analog / Digital Converter) 13
0 converts an analog signal input from the analog input terminal 10b into digital data, and outputs the converted digital data to the ATRAC / DSP / LSI 120 for MD.

D / A (Digital / Analog Converter) 14
0 converts ATRAC-decoded digital music data output from the MD ATRAC / DSP / LSI 120 into an analog signal, and outputs the converted analog signal to the analog output terminal 11b.

The input unit 150 is used for the MD recording / reproducing device 100
Are provided with various operation keys (not shown) for instructing a recording / reproducing operation with respect to. For example, a play key for instructing the start of the reproduction process of the MD1, a stop key for instructing the stop of the reproduction process, a track up / down key for instructing the movement of the optical head, and a recording of predetermined digital music data in the MD1. And a recording mode designating key such as a recording key for designating a recording mode (stereo or monaural system, or ATRAC3-LP2, 4 data compression system).
In addition to various operation keys related to the D playback / recording processing, a volume up / down key for external output, a graphic equalizer key for adjusting sound quality characteristics, an eject key for instructing opening of the MD while being loaded, and the like are provided. Here, the recording mode designation key has the same function as the designation means according to the first aspect.

The input unit 150 includes a TIME key for instructing switching of display screens A1 to A7 (see FIG. 3) showing various time data for the loaded MD1. Here, the above T
The IME key has the same function as the input means according to the second aspect.

The display section 160 is an LCD (Liquid Crystal).
Display) and a microcomputer 17 to be described later.
Various display data are displayed on the display device according to the control signal from 0.

Here, the display section 160 has the same function as the display means of the first aspect.

The microcomputer 170 includes a CPU (Ce
ntral Processing Unit), ROM (Read Only Memor)
y), RAM (Random Access Memory), SR
AM171 and the like. The CPU executes the R
A program for controlling various operations of the MD recording / reproducing apparatus 100 stored in the OM is loaded on the RAM, and various data generated when the program is executed is stored in the RA.
It is temporarily stored in a work area formed in M.

The microcomputer 170 performs various processes such as time calculation control, MD exchange control, MD reproduction control, recording control, and display control. That is, the microcomputer 170 determines that MD1 is MD
When newly loaded into the recording / reproducing apparatus 100, the MD1
And various data such as UTOC are read, and the read UTOC data and the like are stored in the SRAM 171. In particular,
UTOC0 (sector structure of UTOC) included in UTOC
(UTOC sector = 0) The data is shown in FIG.

The microcomputer 170 counts the single time elapsed from the start of the reproduction of the music to the current time and the total time elapsed from the start of the reproduction of the MD1 to the current time.
P-FRA (Pointe) indicated by reference symbol A in FIG.
r for the Freely Recordable Area), based on the address data (see FIG. 2), the single minus time required from the current time to the end of the reproduction, and the MD from the current time.
1 and the remaining time (remaining time) that can be recorded by the MD1 for each data compression method is calculated, and the measured time data and the calculated time data are stored in a predetermined storage area of the built-in RAM. The time calculation control stored in the memory is performed.

The microcomputer 170 stops various processes related to the loaded MD 1 in response to a press signal by pressing the eject key provided in the input unit 150.
MD exchange control for clearing various data such as the UTOC data of the MD 1 stored in the SRAM 171 is performed.

The microcomputer 170 outputs a control signal for instructing the reproduction / stop operation of the MD 1 to the servo control circuit in response to a press signal by pressing the play key or the stop key provided in the input section 150, and outputs the SRAM 171.
Track data being played back stored in the
Various time data stored in M are read, and MD playback control such as outputting the read track data and the time data to the display unit 160 is performed.

The microcomputer 170 displays the time display screens A1 to A7 showing the time data on the display screen of the display unit 160 in response to a press signal by pressing the TIME key, and each time the TIME key is pressed. Time display screen A1
To A7 are sequentially switched (see FIG. 3).

FIG. 3 shows time display screens A1 to A7 in the MD recording and reproducing apparatus 100. As shown in FIG. 3, the track number (TNO; Tr) is displayed on the time display screen A1.
ac NOnber) The single time “0:00” elapsed from the start of the reproduction of the song of “01” to the current time is displayed, and the time display screen A2 is required from the present time of the music of the track number “01” to the end of reproduction. Single minus time "-4: 2
2 is displayed, and the time display screen A3 displays, on the time display screen A3, the total time “0:00” elapsed from the start of the reproduction of the MD to the current time.
T "is displayed, and the time display screen A4 shows M
Total minus time required to end playback of D "-4
8: 12T "is displayed.

Further, the time display screen A5 displays the MD main time “25: 48R” for the stereo system, and the time display screen A6 displays the monaural system and the ATR.
Remaining time “51:36 for AC3-LP2 system”
R "is displayed, and ATRAC3 is displayed on the time display screen A7.
-Remaining time "103: 12R" for LP4 system
Is displayed.

The remaining time "5" for the monaural system and the ATRAC3-LP2 system shown on the time display screen A6.
1: 36R ”is twice the remaining time“ 25: 48R ”for the stereo system shown on the time display screen A5,
The remaining time “103: 12R” for the ATRAC3-LP4 system shown on the time display screen A7 is twice the remaining time “51: 36R” for the monaural system and the ATRAC3-LP2 system shown on the time display screen A6.

As shown in FIG. 3, each of the time display screens A1 to A7 is sequentially switched every time a TIME key (not shown) for inputting a time display screen switching instruction is pressed.

The microcomputer 170 reads the input digital music data in response to the press signal of the recording key provided in the input unit 150 and presses the recording mode (data compression mode) designated by the recording mode designating key provided in the input unit 150. ATRAC / DSP / LS for MD according to the method)
At I120, the read digital music data is ATRAC-encoded, and the processed digital music data is stored in an MD recording / reproducing unit (not shown).
Recording control for recording in D1 is performed.

The microcomputer 170 reads the read MD1
UTOC data, various display data such as the operating state of the MD recording / reproducing apparatus 100 (for example, during reproduction and pause) and a control signal for displaying the display data on the display unit 160 are displayed on the display unit 160. Perform output display control.

Here, the microcomputer 170 has the same function as the calculating means and the control means according to the first aspect.

The SRAM 171 is a storage device capable of reading and writing data at a high speed, and is an ATRAC / DSP / MD for MD.
A buffer area for temporarily storing digital music data output from the LSI 120 and subjected to ATRAC encoding / decoding processing, and a management storage area for storing MD UTOC data are formed.

Next, the operation of the MD recording / reproducing apparatus 100 to which the present invention is applied will be described. FIG. 4 is a flowchart illustrating the time calculation process in the MD recording / reproducing apparatus 100, and FIG. 5 is a flowchart illustrating the time display screen switching process on the display unit 160.

It is assumed that a predetermined MD1 is loaded in an MD reproducing device (not shown) provided in the MD recording / reproducing device 100 (see FIG. 1). Further, it is assumed that the UTOC data of MD1 has already been read and stored in the SRAM 171.

First, the time calculation process will be described with reference to FIG. The microcomputer 170 determines the U of the stored UTOC.
Address data indicated by P-FRA is read from the TOC0 data, and MD is read from the read address data.
One remaining recordable time (remaining time) is calculated based on the recording mode by the stereo method (step S1).
1).

Next, the microcomputer 170 proceeds to step S1.
The remaining time based on the stereo method calculated in 1 is doubled to calculate the remaining time for the recording mode by the monaural method and the ATRAC3-LP2 method, and the remaining time based on the stereo method is quadrupled (or the monaural method and the ATRAC3-LP2 doubles the maintenance time based on the ATRAC3-LP2 method)
A remaining time for the P4 recording mode is calculated (step S12).

Next, the switching process of the time display screen on the display unit 160 will be described with reference to FIG. Display section 160
Is assumed to be displaying a predetermined time display screen (for example, the time display screen A1 shown in FIG. 3). The microcomputer 17
0 determines whether the TIME key provided in the input unit 150 has been pressed (step S21), and ends the time display screen switching process if the TIME key has not been pressed (step S21; No).

In step S21, TIME
If the key is pressed (step S21; Yes), the microcomputer 170 switches the currently displayed time display screen and displays another time display screen (step S2).
2).

For example, if the time display screen A1 shown in FIG. 3 is currently being displayed, the microcomputer 170
Time display screen A1 according to a press signal by pressing a key
To switch the time display screen to the time display screen A2. Further, each time the TIME key is pressed, the microcomputer 170 sequentially switches the time display screens in the order of the time display screens A3, A4,.

As described above, M to which the present invention is applied
The D recording / reproducing apparatus 100 performs the following processing based on the address data indicated by the P-FRA of the UTOC0 of the loaded MD1.
The remaining recordable time (remaining time) of the MD1 according to each recording mode based on the stereo system, ATRAC3-LP2 system, or the like is calculated in advance. That is, the MD recording / reproducing apparatus 100 first calculates the remaining time for the stereo system, doubles the calculated remaining time to calculate the remaining time of the MD1 for the monaural system and the ATRAC3-LP2 system, and further calculates the remaining time for the stereo system. 4 times the MD1 remaining time (or twice the remaining time for the monaural method and the ATRAC-LP2 method) to obtain the MD1 for the ATRAC3-LP4 method.
Is calculated.

Further, the MD recording / reproducing apparatus 100 is provided with a TIME key for instructing the switching of the time display screens A1 to A7 corresponding to the respective remaining times. Each time the TIME key is pressed, the time display screens A1 to A7 are displayed. Are sequentially switched.

Therefore, the stereo system and ATRAC3-L
Since the MD recordable time corresponding to each recording mode can be confirmed only by operating the TIME key without resetting each recording mode based on the P2 system or the like, operability and convenience can be improved. .

In addition to the display based on the above-described operation procedure, from the state in which the remaining time or the minus time in the data compression method is displayed after the recording end operation in the data compression method, after the operation in the key operation or the recording end operation, The remaining time or the minus time in the other data compression method may be sequentially switched and displayed, and finally, the display of the remaining time or the minus time in the original method may be returned.

According to the above-described embodiment, the recordable time for all the encoding systems can be displayed according to the instruction input by the input unit, regardless of the encoding system specified by the specifying unit. Since it is possible to easily confirm the recordable time of a recording destination such as an MD with respect to the format, operability and convenience can be improved.

[0063]

According to the present invention, in a recording apparatus for recording digital data at a recording destination based on a predetermined data compression ratio, a plurality of encoding systems can be supported without changing the setting of the data compression system. You can check the remaining recordable amount.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an internal configuration of an MD recording / reproducing device 100 to which the present invention has been applied.

FIG. 2 shows UTOC0 (sector struc) included in UTOC.
FIG. 7 is a diagram showing data of a “ture of UTOC sector = 0) data.

FIG. 3 is a diagram showing a time display screen in the MD recording / reproducing apparatus 100 to which the present invention is applied.

FIG. 4 is a flowchart illustrating a time calculation process in the MD recording / reproducing apparatus 100 to which the present invention is applied.

FIG. 5 is a flowchart illustrating a process of switching a time display screen on display unit 160 shown in FIG. 1;

FIG. 6 is a diagram showing a time display screen in a conventional recording apparatus.

[Explanation of symbols]

 1 MD1 10a Digital input terminal 10b Analog input terminal 11a Digital output terminal 11b Analog output terminal 100 MD recording / reproducing device 110 MD unit 110a MD slot-in mechanism 110b Pickup unit 110c RF amplifier 120 MD ATRAC / DSP / LSI 130 A / D 140 D / A 150 Input unit 160 Display unit 170 Microcomputer 171 SRAM

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G10L 9/18 G F-term (Reference) 5D044 AB05 BC06 CC06 DE39 EF05 GK08 GK10 5D045 DA08 5D077 AA30 BA26 CA02 DC03 DC12 EA33 FA10 HC03 HC05 HC09 HD02

Claims (2)

[Claims] 1. A designating means for designating an encoding method for encoding recording data, an encoding means for encoding the recording data based on the encoding method designated by the designating means, A recording unit that records the recording data encoded by the encoding unit at a predetermined recording destination; a calculating unit that calculates a recordable time of the recording destination that differs depending on the encoding method; Display means for displaying the set recordable time, wherein the calculating means calculates in advance the recordable times for the plurality of encoding methods, and sequentially displays the recordable times on the display means. A recording device comprising control means for controlling the recording device to perform the recording. 2. An input unit for inputting an instruction to sequentially display the recordable time for the plurality of encoding schemes calculated by the calculation unit on the display unit, wherein the display unit includes the input unit. 2. The recording apparatus according to claim 1, wherein the control is performed in accordance with an instruction input by the control unit.