JP2001312853A - Portable optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To a reproduce or recorde the high quality digital audio form a portable optical disk device. SOLUTION: The portable optical disk device includes a reading module, decoder, digital/analog converter, analog output unit, encoder, recording module, and mechanism for accepting the optical disk having the maximum dimension smaller than 100 mm. The reading module is constituted so that first compressed digital audio data are read from the optical disk being accepted in the above mechanism. By the decoder, the first compressed digital audio data are decoded or deciphered, and at least a part of the first digital audio data not being compressed is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a portable optical disk apparatus for storing digital data on an optical disk and reproducing and recording digital audio data.

[0002]

BACKGROUND OF THE INVENTION Optical disks have many advantages over magnetic disks. For example, optical disks have higher recording densities and shorter access times than magnetic disks. The reading / recording of data on the optical disc is performed without physical contact between the laser read head and the optical disc, thus eliminating wear of the reading device (read head) and the optical disc itself. Generally, optical disks have higher durability than magnetic recording media. Accordingly, optical disks have recently become more prevalent for a wide variety of applications, including digital audio data recording. One type of optical disk commonly used for digital audio data storage is the compact disk (CD). Audio CDs
It is reproduced by a trendy audio entertainment device, for example, a CD player.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a CD
By using / DVD and digital audio compression techniques, it is possible to reproduce or record high quality digital audio from a relatively small and lightweight portable optical disc device.

[0004]

According to a general aspect of the present invention, a portable optical disk device comprises a reading module,
Decoder, digital-to-analog converter, analog output, encoder, recording module, and 100 mm
A mechanism for receiving a CD having a smaller maximum dimension. The reading module is configured to read the first compressed digital audio data from a CD received in the mechanism. The decoder decodes or decodes the first compressed digital audio data and decodes the first compressed digital audio data.
Generating at least a portion of the uncompressed digital audio data. Digital / Analog /
The converter is configured to convert the first uncompressed digital audio data from the decoder into a first analog signal. The analog output is
It is configured to receive a first analog signal.
An encoder receives the second uncompressed digital audio data and generates second compressed digital audio data from at least a portion of the second uncompressed digital audio data. . The recording module is configured to record the second compressed digital audio data on a CD.

[0005] In another aspect of the invention, a portable optical disc device comprises a reading module, a recording module, and a D having a maximum dimension (diameter) less than 100 mm.
Includes a mechanism configured to accept VD. The reading module is configured to read the first compressed digital audio data stored on the DVD. The recording module is configured to store the second compressed digital audio data on the DVD. This portable optical disc device has other features described above, namely, a decoder, a digital
Includes all analog converters, analog outputs, and encoders.

[0006] Implementations of these above aspects of the invention may include one or more of the following features.

[0007] A portable optical disc device can include an audio speaker connected to an analog output.
Further, the portable optical disc device can include a first digital output configured to be connected to an input port of a computer. This first digital output is
Data can be received from a reading module or a decoder. The first digital output can be configured to be connected to a serial port of a computer. Further, the portable optical disc device may include a second digital output connected to the parallel port of the computer. Furthermore, the portable optical disk device is compatible with S / PDIF (Sony / Philips Dips).
digital interface format, Sony / Philips digital interface format).

The decoders are MP3, PASC, ATRA.
Having a format selected from the group consisting of C, DTS, AAC, AC-3, ePAC and VQF;
It can be configured to decode digital audio data that is being compressed. CD
Alternatively, the DVD can store the first uncompressed digital audio data. The reading module comprises a first uncompressed digital audio data stored on a CD or DVD.
It can be configured to read data. The digital-to-analog converter can be configured to convert the first uncompressed digital audio data from the reading module to an analog signal. 12mm to 18mm for CD or DVD
It can have a central aperture with a diameter in the mm range.
The reading module buffers the data read from the CD or DVD and manipulates (ma)
flash configured to nipulate
A memory module may be included. The reading module is configured to demodulate data stored on the CD or DVD, and to de-interleave the data stored on the CD or DVD to de-interleave the data.
e) Deinterleaving means (de-
and a channel decoder configured to perform error correction on data stored on a CD or DVD. The first uncompressed digital audio data and the first compressed digital audio data stored on the CD or DVD are SCMS (Ser)
ial Copy Management System
m, serial copy management system) may include subcode information and / or digital watermark information. And, the reading module may include a security module configured to process the SCMS subcode information and a watermark module configured to process the watermark information.
Also, the CD is Orange Book (Orange Boo)
k) According to CD standard.

Further, the portable optical disk device can include an analog input and an analog-to-digital converter. The analog input can be configured to receive a second analog signal. The analog-to-digital converter is configured to convert the second analog signal to a second uncompressed digital audio data. Further, the portable optical disk device
A microphone connected to the analog input can be included. Further, the portable optical disc device can include a first digital input configured to be connected to an output port of a computer. The first digital input is configured to receive data from a first output port of the computer and transfer the data to a recording module or encoder. The first digital input can be configured to connect to a serial port of a computer. Further, the portable optical disc device may include a second digital input configured to connect to a parallel port of the computer.
Further, the portable optical disk device is provided with an S / PDIF (Son
y / Philips Digital Interfa
ce Format, Sony / Philips Digital Interface Format)
Digital inputs.

[0010] The recording module is configured to receive a portion of the second uncompressed digital audio data and to record the second uncompressed digital audio data on a CD or DVD. Can be. Encoder is MP3, PAS
C, ATRAC, DTS, AAC, AC-3, ePAC
And VQF to generate second compressed digital audio data having a format selected from the group consisting of: The recording device or module comprises a channel encoder, an interleaver for data,
And a modulator. The channel encoder is configured to add error correction information to data to be recorded on a CD or DVD. The interleaving means is configured to interleave data to be recorded on a CD or DVD. The modulating means is
It is configured to modulate data to be recorded on a CD or DVD. In addition, the recording device may include a flash memory configured to buffer and manipulate data to be recorded on a CD or DVD. Further, the recording device can include a security module and a watermark module.
The security module is configured to embed SCMS subcode information in data to be recorded on a CD or DVD. The watermark module is C
The digital watermark information is embedded in the data to be recorded on D or DVD.

[0011] Both CDs and DVDs have a maximum dimension of less than 100 mm, both of which are suitable for storing high volumes of digital data. Standard compatible digital audio compression techniques reduce the capacity required to store digital audio data, but maintain the ability to reproduce high quality audio signals. By using CD / DVD and digital audio compression techniques, the present invention enables high quality digital audio to be played or recorded from a relatively small and lightweight portable optical disc device. .

An embodiment of the present invention will be described below in detail with reference to the drawings. From these, the features and advantages of the present invention will become apparent.

BEST MODE FOR CARRYING OUT THE INVENTION

Referring to FIG. 1 and FIG.
A portable optical disk unit or apparatus 10 for playing back or recording digital audio data stored at 0 is shown. Disk unit 10
Includes a housing 30 and a mechanism 40 configured to receive the optical disk 20 having an overall diameter of 80 mm and a central opening 50 of 15 mm diameter. The disk unit 10 includes a standard 80 mm CD and a CD-R (CD recordable, C
D Recordable) or CD-RW (CD
Optical discs 20 having various formats including rewritable and CD rewritable can be accepted. A standard 80 mm CD (also known as CD Single (CDS)) has a storage capacity of 180 MB. CDS is an uncompressed digital code recorded in 16-bit linear PCM (pulse code modulation) at a sampling frequency of 44.1 kHz.
Audio data can be stored for 21 minutes.
If audio compression techniques are used to record the audio content, the CDS can store even more audio content. For example, MP3 (short for MPEG3, the international standard for video compression, Layer 3) is an audio that can store nearly CD quality audio in a small file that is fast to transfer and easy to store. Compression technology. For example,
The 12: 1 MP3 compression stores 252 minutes of MP3 audio in the CDS.

The receiving mechanism 40 includes a receiving tray 80
And a switch 6 for opening the cover
Contains 0. The receiving tray 80 includes a hub 90 that extends upward from the center of the receiving tray 80 to receive the central opening 50 of the optical disc 20.

Referring to FIG. 3, the portable disk unit 10 further includes a battery storage chamber 110 provided below the disk unit 10 for storing a battery, and a cover plate 115 covering the storage chamber. including. During operation, the disk unit 10 is powered by a battery in the battery compartment 110 or by a DC
DC power is received from a power input 190 (FIG. 4D).

Referring to FIG. 4A, the portable device 1
0 in front of various compression formats: CD, M
A format switch 120 is provided for selecting one of P3 and PASC. The CD format represents uncompressed audio data. Uncompressed audio data is obtained by sampling the waveform with a 16-bit linear PCM, preferably using a sampling frequency of 44.1 kHz. PASC (Precision Adaptiv)
e Sub-band Coding, High Efficiency Coding)
Is another audio compression technique for reproducing true CD quality audio data. By selecting MP3 at the time of reproduction, the disk unit 10 reproduces the audio data compressed by MP3 stored on the optical disk 20. If you select MP3 during recording,
The disk unit 10 converts the audio data to MP
3 is recorded on the optical disc 20 in the format compressed. Similarly, when PASC or CD is selected,
The disk unit 10 plays or records audio in PASC or CD format. In an embodiment of the present invention, in response to the selection of a CD by switch 120, optical disk unit 10 can store or read other types of digital data.

Referring to FIG. 4B, a parallel port 13 is provided on the rear surface of the portable disk unit 10.
0, Serial USB (Universal Serial Bus)
A port 140 and a serial fire port 145 are provided. Parallel port 130 provides a parallel input / output connection with the parallel port of the computer. When connected to a computer via the parallel port 130, the disk unit 10 can transfer digital audio data to the computer,
Alternatively, digital audio data can be received from a computer. The parallel port 130
It uses a 25-pin connector (type DB-25) and is used to connect to computers and other devices that require relatively high bandwidth.

Similarly, USB port 140 provides a serial input / output connection to a computer serial port. Thus, the portable disk unit 1
0 can transfer digital audio data to the computer via the USB port 140;
Then, digital audio data can be received from the computer. USB port 140 is 1
It has a data transfer rate of 2 Mbps. IEEE Standard 1
Fire Wire Port 145 as defined by 394-1995 is a cross-platform implementation of a high-speed serial data bus that can move large amounts of data between disk unit 10 and a computer. is there. This standard includes simplified cabling, hot swapping and 40
It is characterized by transfer speeds up to 0 Mbps.

Referring to FIG. 4C, on one side of the portable disk unit 10, a digital / microphone / line input 170, an analog output 175, a volume switch 150, a recording level switch 160 and a recording level switch are provided. A mode switch 165 is provided. The digital / microphone / line input 170 is in S / PDIF format (Sony / Philips Digital).
InterfaceFormat, Sony / Philips Digital Interface Format)
And this is, for example, a coaxial RCA type connector or a Toslink optical connector. digital/
The microphone / line input 170 is connected to the disk unit 10
To receive digital data from a digital data source such as a computer or CD player having a digital output. Digital data is compressed audio, 16-bit linear P
It can be uncompressed audio in CM format or other types of digital data. The digital / mic / line input 170 also allows the disk unit 10 to receive an analog signal when connected to a microphone. The analog output 175 causes the disk unit 10 to transfer analog signals to an analog device, such as, for example, headphones. Volume switch 150 allows the user to adjust the volume during playback. The recording level switch 160 allows the user to adjust the recording level. Recording module switch 16
5 allows the user to record sound in a manual or automatic mode.

Referring to FIG. 4D, a digital output 1 is provided on the other side of the portable disk unit 10.
80 and a DC power input 190 are provided. The digital output 180 conforms to the S / PDIF format, and the
Is transferred to a digital data storage device. The digital data can be compressed audio, uncompressed audio in a 16-bit linear PCM format, or other types of digital data.

To record data, the disk unit 10 has various inputs 130, 140, 145 and 1
70, a pair of encoders 220 and 230, a modulator or modulator 240, and a laser writing module 250. The first encoder is an encoder 220 that compresses audio data. The second encoder applies error protection to the data to be stored.
interleaving / concealment / error correction encoder 230, which provides the capability Modulator 240 converts the data into a format suitable for an optical disk storage medium. To retrieve data, the disk unit 10 includes a laser reading module 300, a demodulator 310, a pair of decoders 320 and 330, and various outputs 130,1.
40, 145, 175 and 180. The demodulator and the decoder perform operations opposite to those of the modulator and the encoder on the stored data.

The operation will be described below. Referring to FIG. 5, a number of steps are required to record digital audio data on optical disc 20. Input audio data is in analog or digital format. A microphone connected to the digital / microphone / line input 170 receives the sound and converts the sound to an analog signal. A / D (analog-to-digital) connected to digital / microphone / line input 170
Converter 200 receives the analog signal and converts the analog signal to an uncompressed digital signal (4).
16-bit PCM with a sampling frequency of 4.1 kHz
Convert to linear format
I do. Also, the digital / microphone / line input 170
Uncompressed digital audio data can be received directly.

Alternatively, the computer has a computer input 2 such as parallel port 130, USB port 140 or fire wire port 145.
It can be used to provide uncompressed digital audio data to the portable disk unit 10 via. Both digital / microphone /
Line input 170 and computer input 210 are configured to receive other types of digital data, including compressed digital audio data.

The encoder 220 receives compressed or uncompressed digital audio data according to the switch position of the format switch 120. When the format switch 120 is in the "MP3" position, uncompressed digital audio data is provided to the audio encoder 220, where the data is encoded in MP3 format (encoded). ). Similarly, if the format switch 120 is in the "PASC" position, the audio encoder 220 will encode the uncompressed digital audio data in the PASC format. Next, the audio encoder 220
The compressed digital audio signal in P3 or PASC format is sent to the encoder 230 where it is further processed. On the other hand, when the format switch position “CD” is selected, the disk unit 10
Sends uncompressed digital audio data directly to encoder 230. In addition, portable disk
Unit 10 can receive other types of digital data and send the received digital data to encoder 230 for recording on optical disk 20. Encoder 230 performs interleaving and error concealmen.
t) and error correction.

Next, sound (sound) in CD format
Will be described in detail. In the embodiment, SCMS (Serial Copy Mana) is used.
The G.Gent.System subcode and digital watermark information are embedded in digital data for security (ensure system security and reliability) before recording.

In order to record sound in CD format, the portable disk unit 10 uses digital / digital
An audio signal is received from a microphone connected to microphone / line input 170. A / D converter 200
Digitizes a sample of the input audio signal at a given time into two 16-bit words, one for the left channel and the other for the right channel. For example, a single sample of a music signal is L1 = 0111 0000 1010
1000 and R1 = 1100 0111 1010
1000. Six samples (six samples on the left channel and six samples on the right channel, for a total of twelve samples) constitute one frame, ie, L1, R1,
L2, R2, L3, R3, L4, R4, L5, R5, L
6 and R6 are formed. Encoder 230 rearranges the frame into 8-bit words. Each 16-bit audio sample has two 8-bit words: L1, L1, R1, R1, L2, L2, R
2, R2, L3, L3, R3, R3, L4, L4, R
4, R4, L5, L5, R5, R5, L6, L6, R6
And R6. This is a total of 24 8-bit
Give the word.

Next, the even 8-bit word is 2
One block is delayed and the resulting word is scrambled. This delay and scrambling is the first part of the interleaving process.
Interleaving is an effective way to correct burst errors. When a burst error occurs in the interleaved sequence, the error is randomized in position and spread over a large number of code words instead of a small number of code words. In this way, the number of errors that occur in each code block is reduced and can be corrected by using a random error correction code. The resulting 24-byte frame (some 8 in this frame)
Note that the bit word is from some blocks two blocks later) adds 4 bytes of parity check information. This particular parity check information is called "Q" parity and is added based on the error correction code. The resulting 24 + 4Q = 28 byte frames are again interleaved. Each of the 28 bytes is delayed by a different period. Each period is an integral multiple of 4 blocks (in
tegral multiple of 4block
s). Thus, the first byte is delayed by four blocks, the second byte is delayed by eight blocks, the third byte is delayed by twelve blocks, and so on. This interleaving operation extends the above sequence over a total of 28 × 4 = 112 blocks.

The resulting 28 byte frame is:
The parity operation is performed again. This generates four additional parity bytes called P bytes, which are located at the end of the 28 byte frame. Thus, a frame has a total of 28 + 4 = 32 bytes. Finally, other odd-even delays of only a single block (odd-evend)
elay by a single block) is performed. The P and Q parity bits are inverted (1s to 0s) to help read data during playback. Next, an 8-bit subcode is added to the front end of this frame. This subcode specifies additional information, such as the total number of selections on the disc, their length, etc.

Next, the 8-bit data word is EF
The signal is converted into an EFM format by an M (8-14 conversion method) modulator 240. EFM minimizes the number of changes from 0 to 1 and from 1 to 0, so that the resulting data word is suitable for being stored on the optical disc 20. In EFM, only combinations of more than two but less than ten consecutive zeros are used. For example, the decimal number 10 (0000 1010 in binary) is equivalent to EMF1001 0001
00000.

Further, at the front end of each frame, a 24-bit synchronization word (10000000000000000000000)
00010) is attached. Then, each EFM modulation word has 3 merge bits.
s). These merged bits are such that there is no adjacent bit 1 from adjacent EFM words and that the average number of "zeros" and "ones" are approximately the same. Selected. Thus, the final frame (this is 6 × 16 × 2 = 192)
The first containing the data bits now contains 588 bits, which is one sync word (24 bits).
Bit), 1 subcode signal (14 bits), 6 × 2 ×
2 × 14 data bits (336 bits), 8 × 14 parity bits (112 bits), and 34 × 3 merge bits
Bits (102 bits). EFM modulator 240
Uses this final frame as the laser writing module 2
Send to 50. The laser writing module 250 records the final frame on the optical disc 20. In the embodiment, the laser writing module 250
Including flash memory to buffer and manipulate data to be stored at zero.

Referring to FIG. 6, reproduction or reading of digital data stored on the optical disk 20 is performed by
This is performed by processing digital data in a direction opposite to the processing direction during recording. The laser reading module 300 reads data stored on the optical disc 20. In the embodiment, the laser reading module 300
Includes a flash memory module that buffers and manipulates data. Laser reading module 3
If the 00 laser skips reading due to any fault in the disk unit 10, the flash memory buffer will provide data for continuous playback. Flash memory also allows manipulation of data, such as changing the order of audio to be played. EFM demodulator 310 and interleaving / concealment /
The error correction decoder 320 decodes data. In an embodiment, if the SCMS subcode and watermark information are embedded in the digital data to be read, the SCMS subcode and watermark information are processed.

If the data is MP3 or PASC
MP3 / PAS if compressed in format
C decoder 330 decompresses the data. Uncompressed data is D / A (digital to analog)
It is converted to an analog signal by the converter. Uncompressed data can be read by computer 350 via parallel port 130, USB port 140 or fire wire port 145. It can also be read by other devices via digital output 180.

While various embodiments of the present invention have been described, various modifications can be made without departing from the scope and spirit of the invention.

For example, the optical disk 20 may be a digital versatile disk (DVD) including a DVD recordable (DVD-R) disk or a DVD rewritable (DVD-RW and DVD-RAM) disk. Standard single side, single layer 8
0 mm DVD has a storage capacity of 1.4 GB, which is enough to store 159 minutes of uncompressed digital audio data recorded in 16-bit linear PCM. Therefore, this is a 4: 1 PASC
10 hours of compressed CD quality audio or 1
2: 1 MP3 compressed MP3 audio can be stored for 32 hours. 24 bit / 96 kHz uncompressed digital audio or 1 bit / 2.
It can be used to store DSD (Direct Stream Digital) featuring 82224 MHZ for more than 50 minutes.

The encoder 220 and the decoder 330
Are, for example, DTS (Digital Theater Systems), ATRAC (Adaptive Transform
Acoustic coding), AAC (MPEG
2 Advanced Audio Coding, Dolby Digital AC-3, ePAC (Enhanced Perceptual Audio Coder) and others such as VQF (Transform-Domain Weighted Interleaved Vector Quantization) Audio data in a compression format of the type:

The parallel port 130 may be an EPP (enhanced parallel port) or an ECP (extended capabilities port).
Both of these parallel ports allow bidirectional communication.

[Brief description of the drawings]

FIG. 1 is a perspective view of a portable device according to the present invention for receiving an optical disc.

FIG. 2 is a perspective view of the portable device of FIG. 1 in an open state for receiving an optical disc.

FIG. 3 is a bottom view of the portable device of FIG. 1;

FIG. 4A is a front view of the portable device of FIG. 1;
(B) is a rear view of the portable device of FIG. 1, (C) is a diagram showing one side of the portable device of FIG. 1, (D) is another side of the portable device of FIG. 1 FIG.

FIG. 5 is a flowchart showing an optical disk recording processing procedure.

FIG. 6 is a flowchart showing an optical disk reading and / or reproducing procedure.

[Explanation of symbols]

 10: Portable optical disk unit 20: Optical disk 80: Optical disk receiving tray 200: A / D converter 210: Computer input 170: Digital / microphone / line input 220: Encoder 230: Encoder 240: EFM modulator 250: Laser writing module 300: laser reading module 310: EFM demodulator 320: decoder 330: decoder 340: D / A converter 350: computer 180: digital output

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G11B 7/004 G10L 9/18 M

Claims (14)

[Claims] 1. A mechanism for receiving a CD having a maximum dimension less than 100 mm, a reading module for reading first compressed digital audio data stored on the CD received in the mechanism. A decoder for decoding the first compressed digital audio data and generating at least a portion of the first uncompressed digital audio data; and a first compressed digital audio data from the decoder. A digital-to-analog (D / A) converter for converting uncompressed digital audio data into a first analog signal, an analog output receiving the first analog signal, and a second uncompressed digital audio data; And a small amount of the second uncompressed digital audio data. An encoder for producing, from at least a portion, second compressed digital audio data; and a record for storing the second compressed digital audio data on the CD received in the mechanism. A portable optical disc device including a module. 2. The portable optical disk device according to claim 1, wherein said CD conforms to the Orange Book CD standard. 3. The portable optical disc device according to claim 1, wherein the CD has a center opening having a diameter in a range of 12 mm to 18 mm. 4. The CD stores first uncompressed digital audio data, and the reading module stores the first uncompressed digital audio data stored on the CD.
2. The apparatus of claim 1, wherein the data is read, and wherein the D / A converter converts the first uncompressed digital audio data from the reading module into a first analog signal. Portable optical disk device. 5. The decoder according to claim 1, wherein said decoder is MP3, PASC, AT.
RAC, DTS, AAC, AC-3, ePAC and VQ
2. The portable optical disc apparatus according to claim 1, wherein the first compressed digital audio data having a format selected from the group consisting of F is decoded. 6. A reading module, comprising: a flash memory module for buffering and manipulating data read from the CD; a demodulator for demodulating data stored on the CD; 2. The apparatus according to claim 1, further comprising: a deinterleaving means for deinterleaving the data stored in the memory, and a channel decoder for performing error correction on the data stored in the CD.
A portable optical disc device according to claim 1. 7. The method according to claim 1, wherein the first uncompressed digital audio data and the first compressed digital audio data stored on the CD include SCMS subcode information. The module includes a security module that processes the SCMS subcode information, the first uncompressed digital audio data and the first compressed digital audio data stored on the CD. The portable optical disk device according to claim 1, wherein the data includes digital watermark information, and wherein the reading module includes a digital watermark module that processes the digital watermark information. 8. An audio speaker connected to the analog output and a first digital output connected to a serial port of a computer for receiving data from the reading module or from the decoder and receiving the data. Transferring the data to the computer
And a second output connected to the parallel port of the computer.
A second digital output for receiving data from the read module or from the decoder and transferring the received data to the computer; and a third digital output compliant with S / PDIF. The portable optical disk device according to claim 1, further comprising: 9. The recording module receives a portion of the second uncompressed digital audio data and stores the second uncompressed digital audio data on the CD. The portable optical disk device according to claim 1, wherein 10. The encoder according to claim 1, wherein said encoder is MP3, PASC,
The method of claim 1, wherein the second compressed digital audio data has a format selected from the group consisting of ATRAC, DTS, AAC, AC-3, ePAC, and VQF. Portable optical disk device. 11. A channel encoder for adding error correction information to data to be stored on the CD, interleaving means for interleaving data to be stored on the CD, and modulating data to be stored on the CD. A modulator; a flash memory module for buffering and manipulating data to be stored on the CD; a security module for embedding SCMS subcode information in the data to be stored on the CD; 2. The portable optical disk device according to claim 1, further comprising a digital watermark module for embedding digital watermark information in data to be performed. 12. An analog input for receiving a second analog signal; an A / D converter for converting said second analog signal to said second uncompressed digital audio data; The portable optical disk device according to claim 1, further comprising a connected microphone. 13. A first digital input connected to a serial port of a computer for receiving data from the serial port of the computer and transferring the data to the recording module or the encoder. A second digital input connected to the parallel input port of the computer for receiving data from the parallel input port of the computer and transferring the data to a recording module or the encoder. 2. The portable optical disk device according to claim 1, further comprising a digital input of the digital optical disc and a third digital input conforming to S / PDIF. 14. A mechanism for receiving a DVD having a maximum dimension of less than 100 mm, a reading module for reading first compressed digital audio data stored on the DVD received in the mechanism. A decoder for decoding the first compressed digital audio data and generating at least a portion of the first uncompressed digital audio data; and a first compressed digital audio data from the decoder. A digital-to-analog converter that converts uncompressed digital audio data into a first analog signal, an analog output that receives the first analog signal, a second uncompressed digital audio data, and Of the second uncompressed digital audio data An encoder for generating second compressed digital audio data from at least a portion thereof; and a recording module for storing the second compressed digital audio data on the DVD received in the mechanism. And a portable optical disc device including: