JPH07147063A - Disk device capable of recording/reproducing received av data - Google Patents

Abstract

PURPOSE:To provide the disk device capable of recording/reproducing AV data received via a communication circuit. CONSTITUTION:This disk device records/reproduces the AV data of a reloadable disk 1 as a object. The disk device is provided with a communication I/F 21 and a receiving buffer 22 and is provided with switch circuits 23, 24 which are changed over by an ordinary recording/reproducing mode and receiving recording/reproducing mode as well. The received AV data is reproduced by connecting the switch circuit 23 to the (b) side in the receiving reproducing mode. The recording of the AV data to the disk 1 and monitoring thereof are executed by connecting the switch circuit 24 to the (d) side and the switch circuit 23 to the (b) side in the receiving recording mode. The disk device is provided with receiving recording/reproducing functions and enables a user to enjoy a wide range of the AV software transmitted from the other station while many pieces of the built-in software are commonly used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a "disk device capable of recording / reproducing received AV data", and can record or reproduce audio data and / or video data (hereinafter referred to as "AV data") normally. And a disk device capable of recording / reproducing AV data transmitted from a partner station via a communication line.

[0002]

2. Description of the Related Art A CD (Compa
About 10 years have passed since the introduction of ct Disc), and it has already outstripped conventional cassette tapes and has been widely spread,
Along with that, CD, which is a variation disc of CD-
Discs such as ROM and CD-I (Interactive) capable of recording general data and image / character information have also been developed and are being used for various purposes. Recently, semiconductor laser technology and MPEG (Moving Picture Image Coding Exp
A) by improving the data compression technology based on the ert group method
DVD (Digital that can record / reproduce V data
Video Disc) has been developed, and it is expected as an AV medium which is intended to improve the data transfer speed and the capacity while reducing the size and digitalization of the conventional LD (Laser Disc).

Conventionally, a dedicated disc reproducing device corresponding to the specifications of each disc has been used for reproducing a CD or its variation disc, but a data compression method has been standardized with the development of DVDs, and AV software has been standardized. When abundant supply of AV data is provided, not only can AV disc data be reproduced by individual disc reproduction devices, but a service network that widely supplies AV software via communication lines can also be realized. is expected.

On the other hand, in the United States, a network for supplying AV software to each home by using a digital subscriber line is already being put to practical use, and a newly developed ADSL (communication interface) for a subscriber terminal side is used. Asymm
etric Digital Subscriber Line) adapter is used,
A method is adopted in which AV data received by the adapter is reproduced by a television receiver. This ADSL adapter uses a wide band that has not been used in a digital subscriber line to exchange digital signals for data over
The voice system is adopted, and it has a communication interface function for communicating at a transmission rate of 1.5 (Mbit / sec) on the downlink from the station side to the home and at a low transmission rate on the reverse uplink.

[0005]

By the way, at present, there is no disk device capable of receiving and recording / reproducing AV data such as CD and DVD. This is due to various reasons such as when the disk device receives AV data, it is necessary to execute the communication protocol prior to receiving the data, and the transmission data format at the time of communication is not fixed. ADSL as above
If a communication interface such as an adapter is developed and the data compression technology is standardized by the MPEG system, it becomes easy to directly record / reproduce the AV data received by the disk device as a communication terminal. Therefore, the present invention provides a disc device capable of recording / reproducing received AV data only by adding a communication function, a mode switching function, etc. to a conventional disc device for a disc such as a CD or a DVD, and a digital subscription line. It was created for the purpose of realizing a network service of AV software using the above.

[0006]

According to a first aspect of the present invention, in a reproduction-only disc device for AV data or a disc device capable of recording / reproducing, mode selection means for setting a disc reproduction mode and a reception / reproduction mode, and the reception are provided. Communication means for executing a communication protocol with the partner station via the communication line in the set state of the reproduction mode, and for receiving the decoded data of the disc transmitted from the partner station and the AV data having the common format, and the receiving means. Data buffer means for temporarily accumulating AV data, and data for reading the received AV data from the data buffer means in accordance with the data processing speed of the reproduction signal processing section in the reception reproduction mode setting state and transferring it to the switching means described later. Transfer means and a disc output from the reproduction decoder in the disc reproduction mode setting state A disc device capable of reproducing the received AV data, comprising a switching unit for inputting the decoded AV data received by the data transfer unit to the reproduction signal processing unit in the reception reproduction mode setting state. Pertain to.

A second aspect of the present invention is, in a disk device capable of recording / reproducing AV data, mode selecting means for setting a normal recording mode and a reception recording mode, and a communication line in the reception recording mode setting state. Communication means for executing a communication protocol with the partner station and receiving AV data having a common format and the decoded data of the disk transmitted from the partner station, and data buffer means for temporarily storing the received AV data of the communication means And receiving AV from the data buffer means according to the data recording speed of the recording section with respect to the disc in the setting of the reception recording mode.
Data transfer means for reading out data and transferring it to the switching means described later, and normal input AV data output from the recording signal processing section in the setting state of the normal recording mode, and data transfer means in the setting state of the receiving recording mode. The present invention relates to a disk device capable of recording received AV data, characterized by comprising switching means for inputting the received AV data read out by the recording encoder.

[0008]

[Action]

Regarding the first invention; the present invention is applied to a reproduction-only disc device for AV data or a disc device capable of recording / reproducing, and the disc reproducing mode and the receiving / reproducing mode are selectively set by the mode selecting means. In the disc reproduction mode, the switching means connects the reproduction decoder and the reproduction signal processing unit, and the reading unit reads AV data from the disc and reproduces it in a normal operation.

On the other hand, in the reception / reproduction mode, the communication means accesses the partner station to execute a predetermined communication protocol to receive the transmission data from the partner station. In that case, the partner station transmits the decoded data of the disc on the disc device side and the AV data in a common format as the source data. Further, the AV data received by the communication means is temporarily stored in the data buffer means.

In the receiving / reproducing mode, the switching means connects the data buffer means and the reproduced signal processing section, and the data transfer means receives the received AV data from the data buffer means according to the data processing speed of the reproduced signal processing section. The read signal is transferred to the reproduction signal processing section via the switching means. Therefore, the reproduction signal processing unit can perform the reproduction processing of the received AV data similarly to the decoded data of the disc in the disc reproduction mode, and the output side circuit after the reproduction signal processing unit is shared between the disc reproduction mode and the reception reproduction mode. However, it becomes possible to reproduce the AV data.

Regarding the second invention: The present invention is applied to a disk device capable of recording / reproducing AV data, and is set to a normal recording mode or a reception recording mode by a mode selecting means. In the normal recording mode, the switching means connects the recording signal processing unit and the recording encoder,
Based on the normal operation, AV data directly input to the device is transferred from the recording signal processing unit to the recording unit via the recording encoder, and the encoded data is recorded on the disc.

On the other hand, in the receiving / recording mode, similarly to the first aspect of the invention, the communication means executes the access and communication protocol of the partner station to receive the decoded data of the disk and the transmission data of the common format from the partner station, The reception AV data is temporarily stored in the reception buffer means. And
In the reception / recording mode, the switching means connects the data buffer means and the recording encoder, and the data transfer means reads the received AV data from the reception buffer means according to the data recording speed of the recording section and records the data through the switching means. For transfer to the encoder. Therefore, the recording unit can directly record the received AV data encoded by the recording encoder on the disc, and record the AV data while sharing the recording unit encoder and the recording unit in the normal recording mode and the reception recording mode. Will be possible.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a "disk device capable of recording / reproducing received AV data" of the present invention will be described below in detail with reference to the drawings. First, FIG. 1 shows a system block circuit diagram of a disk device for recording / reproducing on / from a phase change disk in a data format of CD or DVD. In the figure, 1 is a phase change disk, 2 is a spindle motor, 3 is a read / write section, 4 is a spindle servo section, 5 is a focus / tracking servo section for the read / write section 3, 6 is a servo control circuit, and 7 is An RF amplifier that amplifies the read signal of the reading unit 3, 8 is a reproduction decoder that decodes the amplified read signal, 9 is a laser drive unit that controls laser power during recording / reproduction, and 10 is AV data as a write signal. Recording encoder for encoding, 11 for signal detection /
EFM (Eight to Fourteen Modulation) signal processing unit that performs demodulation / error detection / correction / MPEG encoding / decoding of DVD data, 12 is an AV signal output analog circuit, and 13 is an AV signal input analog system A circuit, 14 is a CPU that controls the signal processing unit 11, 15 is an operating unit, 16 is a display unit, and 17 is a CPU that controls the entire system.

The disk drive further has the following features. ADSL adapter 21 (communication line 20
The specification is changed depending on the type of the communication system) and has a communication function of communicating with the partner station via the communication line 20. A reception buffer 22 for temporarily accumulating the AV data received by the ADSL adapter 21 is provided. The data input circuit to the signal processing unit 11 is a reproduction decoder 8
A switch circuit 23 is provided for switching between the ADSL adapter 21 side and the ADSL adapter 21 side. A switch circuit 24 is provided for switching the data input circuit to the recording encoder 10 between the signal processing unit 11 side and the reception buffer 22 side. A normal disk recording / reproducing mode and a reception recording / reproducing mode can be selectively set from the operation unit 15, and the CPU 17 is provided with a program for switching the system mode according to each selection mode and executing a control procedure in each mode. The display unit 16 is provided with an alarm buzzer 16a.
The communication line 20 is a high-speed digital line and is a B-ISD.
N (Integrated Service Digital Network) or the like is used.

The operation procedure in each mode by this disk device will be described below with reference to the flow charts of FIGS. FIG. 3 shows an operation procedure in a normal disc reproduction mode. First, when the disk reproduction mode is selected and set from the operation unit 15, the CPU 17 sets the connection state of the switch circuit 23 to the reproduction decoder 8 side (a side). Next, when there is a reproduction instruction input from the operation unit 15 with the disc 1 set, the servo control circuit 6 controls the spindle servo unit 4 and the focus / tracking servo unit 5 and follows the normal operation when the disc reproduction is started. The reading unit 3 is moved to the lead-in area of the disc 1 to read the TOC (Table of Contents) information of the disc 1 (S1, S
2).

This TOC information includes table of contents information such as the number of the program (song or video) recorded on the disc 1 and time information. The Q channel of the TOC information is the same as the sub coding of the data area. It has a frame structure as shown in, and data bits that represent the above information.
Control bit (4 bits) preceding (72 bits)
And address bits (4 bits) are added. The control bits Q1 to Q4 indicate that it is an audio disc when Q2 is "0" and that it is a data disc when Q2 is "1", and is the phase change disc 1 in this embodiment. Therefore, the former case is recorded in the CD format, and the latter case is recorded in the DVD format. Therefore, the read TO
The C information is fetched from the decoder 8 via the CPU 14 to the CPU 17, and the CPU 17 judges the type of the disk 1 from the contents of the control bits Q1 to Q4.

As a result of the above judgment, when the disc 1 is recorded in the CD format, the CPU 17
Immediately sets the CD flag and sets the signal processing unit 11 to the CD reproduction processing mode by the CPU 14 (S3 → S4, S5). Then, after confirming the input instruction data and displaying the music number or the like corresponding to the instruction data on the display unit 16, the servo control is executed to move the reading unit 3 to the recording position of the instruction music data, and the data is sequentially read. Playing song data (S6-S
Ten). At this time, the reproduction signal is [reading section 3 → RF amplifier 7 →
It is output as a D / A converted audio signal through the reproduction decoder 8 → switch circuit 23 → signal processing unit 11 → output analog circuit 12]. Further, thereafter, every time when the reproduction of the music data for one movement is completed, the input instruction data is confirmed and the steps S6 to S10 are executed to decode and reproduce all the instructed music data. Becomes (S11 → S6
~ S10).

On the other hand, the control bit Q of the TOC information
If Q2 is "1" according to the judgment result of 1 to Q4, DV is immediately sent.
Instead of judging the disc to be recorded in the D format, the CPU 17 moves the reading unit 3 from the lead-in area to the data area, and confirms whether or not the disc 1 is in the DVD format by the read subheader. (S3 → S12, S13). Further, in this case, even if the sub-header indicates that the DVD format is used, the judgment is not fixed, the first track (only control code etc. is recorded on the DVD) is read, and the CPU 14 decodes the decoded data. It is confirmed whether or not it is data (S14, S15). Then, the confirmation result is notified from the CPU 14 to the CPU 17, and if it is MPEG data, the CPU
17 sets the DVD flag at that stage and sets the signal processing unit 9 to the DVD reproduction processing mode by the CPU 14.
(S16 → S17, S18).

As a result, the reproduction signal of the DVD format of the disc 1 is passed through the [reading section 3-> RF amplifier 7-> reproduction decoder 8-> switch circuit 23-> signal processing section 11-> output analog system circuit 12] audio / video. It is output as a signal. still. In this case, since it is the DVD format,
The signal processor 11 expands the MPEG data and outputs it to the output analog circuit 12. Also, the procedure for reproducing one chapter from the disc 1 is the same as in the case of the CD format, and the CPU 17 displays each of the chapters while displaying the video of the reproduced chapter and the content of the music which are instructed and input from the operation unit 15. Play back (S19-S24). On the other hand, if it is not the DVD format in step S13 (for example, if it is a CD-ROM) or if it is not the MPEG data in step S16, the CPU 17 that has received the notification cannot reproduce on the display unit 16. Display that there is (S13, S16 → S25).

Next, FIG. 4 shows an operation procedure in the reception / reproduction mode. First, when the reception / reproduction mode is selected and set from the operation unit 15, the CPU 17 switches the connection state of the switch circuit 23 to the reception buffer 22 side (b side). Next, in this mode, the other station such as an AV software service center is called via the communication line 20. Specifically, when the telephone number of the partner station is input from the operation unit 15 to give a call instruction, the CPU 17 causes the ADSL
A call is made to the partner station via the adapter 21, and the call is set when the partner station responds (S31). The call setting and the communication related to the next communication protocol are performed at a low transmission rate using the control channel of the communication line 20.

When the call is set up, the CPU 17 causes the ADSL adapter 21 to execute the communication protocol preliminarily agreed with the other station, and the data link is established by the communication by the regular transmission control code. , AD
The SL adapter 21 is ready-set in the high-speed transmission data reception mode (S32 to S34). On the other hand, the partner station has completed preparations for data transfer when the data link is established.
The PU 17 causes the ADSL adapter 21 to transmit the data transfer request code and shifts to the start of data reception (S35, S3
6). In such a service network, the content of video or music to be served in a pamphlet or the like is often given a code number to notify the recipient side in advance. In such a case, the operation unit 15 makes a request. It is also possible to input the code number of the image or music, notify the service center side of the code number at the stage of executing the communication protocol, and select the image or music to receive the service.

By the way, the partner station transmits the decoded data of the CD or DVD held by the same station as it is through a high speed data channel in the down direction (service center, etc. → disk device). That is, when the partner station is a service center or the like, the decoded data of the CD or DVD is stored in the library and the ADSL installed in the same station.
Communication line 20 after link establishment by a compatible transmission system
Send to. Therefore, the disc device can receive the decoded data of the CD or the DVD as it is, and can process it in the same manner as the decoded data in the disc reproduction mode.

In the disk device, the switch circuit 23 connects the reception buffer 22 and the signal processing unit 11 as described above based on the setting of the reception reproduction mode, and the received data is transferred to the signal processing unit 11. Become. However, communication line
20 data transmission speed is constant, while signal processing unit
Since the data processing speed of 11 fluctuates, the CPU 17 controls the reading / transferring speed of data from the reception buffer 22 in accordance with the data processing speed of the signal processing unit 11.

After receiving the data, the other station is AV
The TOC data is transmitted prior to the data transmission, and the disc device side determines whether the transmission data is the CD format or the DVD format based on the TOC data, and the procedure for setting the CD reproduction processing mode in the case of the CD format. For the procedure for confirming whether or not the transmission data corresponding to the first track is MPEG data and setting the DVD reproduction processing mode, and the procedure for reproducing music, etc.,
The only difference is that the data to be reproduced is the data of the disc 1 or the received data, and the same operation as in the disc reproduction mode is executed (S38 to S57). Therefore, in the disc device, the signal processing unit 11 and the output analog system circuit 12 can be shared in the disc reproduction mode and the reception reproduction mode, and the AV data received from the partner station can be reproduced in the reception reproduction mode. In this reception / reproduction mode, D
If it is not the VD format (S46) or if it is not the MPEG data (S48), the CPU 17 causes the display unit 16 to display that reproduction is impossible, and the other station continues data transmission as it is. The ADSL adapter 21 sends a data transmission stop request through the control channel of the communication line 20, and after confirming the request, the connection line is disconnected this time (S46, S48 → S55 to S57).

Next, the operation in the recording mode of this disc device will be described. When the normal recording mode is set from the operation unit 15 in this disk device, the CPU 17 causes the switch circuit 24 to operate.
And the signal processing unit 11 is connected (c side), and the input AV
While the data processing unit 11 processes the data through the input analog system circuit 13 and the servo control circuit 6 performs the focus / tracking servo of the recording unit 3, the recording encoder 1
The recording signal encoded by 0 causes the laser driving unit 9 to
Data is recorded on the disc 1 by controlling the laser power of. In that case, the signal processing unit 11 sets the processing mode corresponding to the case where the input data is the CD format and the DVD format, respectively. The details will be described in the next reception recording mode.

By the way, the characteristic of this disc device is that the AV data transmitted from the partner station in the receiving and recording mode is recorded on the disc 1, and the operation procedure in the receiving and reproducing mode is shown in the flowchart of FIG. First, the operation part
When the reception recording mode is selected and set from 15, the CPU 17 changes the connection state of the switch circuit 24 to the reception buffer 22 side (d side).
In addition, the connection state of the switch circuit 23 also depends on the reception buffer 22 side (b
Side). Further, when this mode setting is made, the CPU 17 sets a preliminary reproduction mode, the servo control circuit 6 activates the preset disk 1, and the reading unit 3 makes a U-TOC (User's Table O) of the disk 1.
f Contents) data is read and the data is read by the CPU 14
Save to internal memory via (S61).

Next, as in the case of the reception / reproduction mode, the data link is established by setting the call with the partner station and executing the communication protocol, and the ADSL adapter 21 is made ready to receive the data transfer request (S62). ). Further, a procedure for discriminating between the CD format and the DVD format based on TOC data after the start of data reception, a procedure for setting the CD reproduction processing mode in the case of the CD format, and whether or not the transmission data corresponding to the first track is MPEG data The procedure for confirming whether or not the DVD reproduction processing mode is set is executed in the same manner as in the reception reproduction mode (S63-
S65, S72 to S75). If it is not the DVD format (S73) or if it is not the MPEG data (S75), a non-recordable display is displayed on the display unit 16 and a data transmission stop request is sent to the partner station to send the current line. Turn off (S85 to S8
7).

In this reception recording mode, the disc is
Since it is necessary to confirm whether or not the free recording capacity of 1 is sufficient to record all the data transmitted from the partner station, based on the U-TOC data saved earlier, the disk 1 The free recording capacity is calculated as a value converted into time, and the playback time of all the data transmitted based on the received TOC data is calculated. By comparing them, it is determined whether or not the free recording capacity of the disc 1 is sufficient. Judge (S66, S76).

As a result of the above judgment, when the free recording capacity of the disc 1 is sufficient, the process shifts to the recording of the received data on the disc 1. First, when the determination result based on the TOC data is the CD format, the reception CD flag is turned on, the reception CD data in the reception buffer 22 is read, and the data is transferred to the recording encoder 10 via the switch circuit 24. Then, the laser drive unit 9 records the recording unit 3 on the disk 1 which is drive-controlled by the servo control circuit 6 in advance.
Record the received CD data while controlling the laser power of
(S67, S69-S71). Even in this recording state, since the data receiving speed and the recording speed on the disc 1 are different, the CPU 1
Reference numeral 7 controls the data read / transfer speed from the reception buffer 22 in accordance with the data recording speed.

Further, the CPU 17 sets the signal processing unit 11 to the CD reproduction processing mode based on the ON of the reception CD flag,
The received CD data read from the reception buffer 22 is transferred to the signal processing unit 11 via the switch circuit 23 connected to the b side, and the processed data is output as an audio output for monitoring via the analog system circuit 12. Allow (S68, S70).

On the other hand, when the received data is determined to be in the DVD format (S65 to S75), the received DVD flag is turned ON, the received DVD data in the reception buffer 22 is read out, and transferred to the recording encoder 10. The MPEG data is recorded on the disc 1 by the same operation procedure as in the case of the CD format (S77 to S81). Also,
The signal processing unit 11 is set to the DVD reproduction processing mode in order to output the audio / video data for the monitor (S7
8).

In the above, the case where the disk 1 has a free recording capacity capable of recording all received data has been described (S66 → S67, S76 → S77), but if the free recording capacity is insufficient, the CPU 17 Immediately, the operator is notified by sounding the alarm buzzer 16a provided on the display unit 16 (S66, S76 → S82). Further, since the partner station continues data transmission as it is, the data transmission stop request is sent to the partner station and the connection line is disconnected this time, as in the reception / reproduction mode (S83, S84).

In this embodiment, the disk drive system 2, 4, 5, 6
The signal read / write system 3,7,9 has been described as having a single structure.
If each unit can be independently set by the PU 17, the disc reproduction mode and the reception recording mode can be set at the same time, and the reception AV data is recorded on the other disc while reproducing the AV data on one disc. In addition, it is possible to prevent the received AV data from being accidentally overwritten on the disc that should not be erased.

Further, there are grades such as MPEG1 and MPEG2 in the data compression / expansion of the MPEG system, but it is possible to identify those grades and execute the processing corresponding to the grade identified in the signal processing unit 11. is there. In that case, S13 in FIG. 3 explained above,
The grade is identified at the stages of S46 in FIG. 4 and S73 in FIG. 5, and the signal processing unit 11 is set to the processing mode corresponding to the grade. Further, although MPEG2 has a plurality of levels and profiles, it is also possible to extend the above-mentioned identification to the contents thereof and perform processing corresponding to the identified level and the like.

[0035]

The "disk device capable of recording / reproducing received AV data" of the present invention has the following effects due to the above-mentioned configuration. According to the first and second aspects of the invention, in the disk device, the AV data transmitted from the partner station via the communication line is received, and the built-in hardware is provided in the normal recording / reproducing mode and the receiving recording / reproducing mode. It is possible to record / reproduce the received AV data while sharing it, to efficiently use hardware resources and to construct a network in which a user can enjoy a wide range of AV software with a simple operation. According to the invention of claim 3, in the reception recording mode, it is confirmed in advance whether or not all the received AV data can be recorded by the free recording capacity of the disc, and when the free recording capacity of the disc is insufficient, a notification is given. It is possible to automatically execute a countermeasure such as a request to stop transmission of AV data to a partner station.

[Brief description of drawings]

FIG. 1 is a disk device according to an embodiment of a “disk device capable of recording / reproducing received AV data” of the present invention (a disk device that executes recording / reproducing in a CD or DVD data format targeting a phase change disk). 2) is a system block circuit diagram of FIG.

FIG. 2 is a diagram showing a frame structure of a Q channel of TOC information.

FIG. 3 is a flowchart showing an operation procedure in a disc reproduction mode.

FIG. 4 is a flowchart showing an operation procedure in a reception / reproduction mode.

FIG. 5 is a flowchart showing an operation procedure in a reception recording mode.

[Explanation of symbols]

1 ... Phase change disk (disk), 2 ... Spindle motor,
3 ... Read / write section, 4 ... Spindle servo section, 5 ... Focus / tracking servo section, 6 ... Servo control circuit,
7 ... RF amplifier, 8 ... Reproduction decoder, 9 ... Laser drive unit, 10 ... Recording encoder, 11 ... Signal processing unit (reproduction signal processing unit, recording signal processing unit), 12 ... Output analog system circuit, 13
Input analog circuit, 14, 17 CPU (14, 17; mode selection means, 17; communication means, data transfer means, switching means), 15
... operation section (mode selection means), 16 ... display section, 16a ... alarm buzzer, 20 ... communication line, 21 ... ADSL adapter (communication means), 22 ... reception buffer (data buffer means), 23,
24 ... Switch circuit (switching means).

Claims (3)

[Claims] 1. In a reproduction-only disc device for reproducing audio data and / or video data (AV data) or a disc device capable of recording / reproducing, a mode selecting means for setting a disc reproduction mode and a reception reproduction mode, and the reception reproduction. An AV that executes a communication protocol with a partner station via a communication line in the mode setting state and has a common format and the decoded data of the disk transmitted from the partner station
Communication means for receiving data and reception AV of the communication means
Data buffer means for temporarily storing data, and data transfer for reading the received AV data from the data buffer means according to the data processing speed of the reproduction signal processing section in the setting of the reception / reproduction mode and transferring it to the switching means described later. And the received AV data read by the data transfer means in the reception / reproduction mode setting state, to the reproduction signal processing section. A disc device capable of reproducing received AV data, comprising a switching means. 2. A disk device capable of recording / reproducing audio data and / or video data (AV data), in a mode selecting means for setting a normal recording mode and a reception recording mode, and in a setting state of the reception recording mode. Communication means for executing a communication protocol with the partner station via the communication line and receiving the decoded data of the disc and the AV data having a common format transmitted from the partner station;
Data buffer means for temporarily accumulating the received AV data of the communication means, and read the received AV data from the data buffer means in accordance with the data recording speed of the recording section with respect to the disk in the setting state of the reception recording mode, and switch it later. Data transfer means for transferring to the recording means and the normal input AV data output from the recording signal processing section in the setting state of the normal recording mode, and the reception AV data read by the data transfer means in the setting state of the receiving recording mode. A disk device capable of recording received AV data, characterized by comprising switching means for inputting data to a recording encoder. 3. A first detection means for driving a disc which is set in advance in setting the reception recording mode to detect a free recording capacity of the disc, and TOC information transmitted from a partner station prior to transmission of AV data. Second detection means for detecting the data amount of the AV data transmitted based on the above, and when the data amount detected by the second detection means is larger than the free recording capacity detected by the first detection means, the fact is notified. A disk device capable of recording received AV data according to claim 2, further comprising a notification means for performing the above.