JP3199210B2 - Portable AV equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention refers to audio data and / or video data (that is, audio data only, video data only, audio data and video data, and hereinafter referred to as "AV data"). Write)
Not only normal recording / reproduction (that is, three modes of recording-only, reproduction-only, and recording / reproduction; hereinafter, referred to as "recording / reproduction"), but also a public / private communication line. TECHNICAL FIELD The present invention relates to a portable AV device having an integrated structure capable of recording / reproducing AV data transmitted from a computer.

[0002]

2. Description of the Related Art At present, MPEG (Moving Picture Image) is used.
DV capable of recording / reproducing AV data by improving the data compression technology based on the Coding Expert Group) method
D (Digital Video Disc) has been developed. In addition, along with the development of this DVD, AV data (A
It is desired to realize a service for supplying V-software over a wide range.

[0003] In the United States, a network for supplying AV software to each home by using a digital subscription line is already being put into practical use. That is, ADSL (Asymm) newly developed as a communication interface on the subscriber terminal side.
etric Digital Subscriber Line) adapter is used,
A method is employed in which AV data received by the adapter is reproduced by a television receiver. This ADSL adapter employs a data over voice system in which digital signals are exchanged using a wide band which is unused in a digital subscriber line. Bit / sec), and the reverse uplink has a communication interface function of communicating at a low transmission rate.

On the other hand, small and lightweight portable telephone terminals that can be wirelessly connected to public communication lines are widely used in Japan. However, a small and lightweight portable AV terminal capable of recording / reproducing various kinds of AV software anytime and anywhere has not yet appeared, but only a small and lightweight portable audio device has been found. . That is, this portable audio device converts an analog audio signal from a microphone into a digital audio signal and records it on a semiconductor memory card, and converts a digital audio signal recorded on the semiconductor memory card into an analog audio signal during reproduction. There is only known a sound recording / reproducing apparatus which outputs a sound from a speaker (for example, see Japanese Patent Application Laid-Open No. Hei 5-173897).
issue).

[0005]

[Problems to be solved by the invention]

(1) AV software, CD,
A small and lightweight portable AV terminal capable of recording / reproducing both packaged AV software such as DVDs anytime and anywhere has not yet been realized. As a result,
Even if a network for supplying the above-described AV software to each home is established, the received AV software can be used only for reproduction on a television receiver. In addition, as described above, there is a small and lightweight portable audio device, but it is only for recording and reproducing sound from a microphone, and it is hardly possible to record and reproduce packaged AV software. Therefore, conventionally,
A small and lightweight portable AV terminal capable of recording / reproducing both distributed AV software and packaged AV software anytime and anywhere has not been realized.

(2) It is expected that a service network that supplies AV software over a wide range via a communication line will be realized with the development of DVD. On the other hand, small and lightweight portable terminals are used in fields other than AV, and some of them have a display such as a liquid crystal. However, this is only a portable communication device (telephone). Such devices are available anywhere
It has not been considered to use it for applications where it can be enjoyed. Therefore, for example, there is a drawback that a service network of AV software cannot be used effectively. Furthermore, it was not possible to reproduce so-called package software by mounting a separate cartridge. Furthermore, there has been a demand for further reducing the amount of data transmitted to the partner station and ensuring compatibility.

(3) The present invention comprises a memory cartridge using a solid-state memory capable of recording / reproducing both AV software or package AV software distributed from a communication line, and the AV supplied from the memory cartridge.
Software can be selectively recorded / reproduced, and reproduction / reproduction of AV software distributed from a communication line can be performed prior to reproduction from this memory cartridge, and recording / reproduction can be performed. It is an object of the present invention to provide a portable AV device having an integral structure with a main body.

(4) Further, according to the present invention, the AV data transmitted through the communication line and the AV data supplied from the cartridge are provided.
When data is selectively reproduced and recorded, control (transmission control) is performed so that information (snap image, moving image) recorded via a communication line or the like is transmitted, and when transmitting this information, the data amount is reduced. It is an object of the present invention to provide a portable AV device which records and reproduces data using a memory cartridge using a solid-state memory and has an integrated structure suitable for carrying.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a portable AV apparatus having the following constitutions (1) to (7).

(1) A portable AV apparatus A having a memory cartridge (memory) 1 for reproducing audio data and / or video data (AV data) and suitable for carrying.
An ADSL adapter (communication means) 21 which is a communication interface for receiving at least received AV data transmitted via the communication line 20, and a memory for outputting a reproduction signal corresponding to the AV data read from the memory 1. The operation unit 15 and the CPU 17 for selecting one of a reproduction mode and a reception reproduction mode for outputting a reproduction signal corresponding to the received AV data (reproduction mode selection means). A reception buffer (reception AV) that variably outputs the reception AV data according to
Data output means) 22 and, when a memory reproduction mode is selected, a reproduction signal corresponding to the AV data output from the memory 1 is switched and output.
A switch circuit (switching means) 2 for switching and outputting a reproduction signal according to AV data output from the data output means 22
3. A portable AV device comprising:

(2) A portable AV apparatus A having a memory cartridge (memory) 1 for recording audio data and / or video data (AV data) and suitable for carrying.
A is a ADSL adapter (communication means) 21 for receiving at least the reception AV data transmitted through the communication line 20, provided in the apparatus other than the communication means 21
A memory recording mode for recording AV data supplied from the AV data input means 13 in the memory 1 and a reception recording mode for recording received AV data transmitted via the communication line 20 in the memory 1. An operation unit 15 for selecting one of the modes and a CPU 17 (recording mode selection means); a reception buffer (reception AV data output means) 22 for variably outputting the reception AV data according to a data recording processing speed; When the memory recording mode is selected, the AV supplied from means other than the communication means 21
A switching circuit (switching means) 24 for switching and outputting data to the memory and switching and outputting a recording signal corresponding to the AV data output from the received AV data output means 22 to the memory 1 when the reception / reproduction mode is selected. A portable AV device characterized in that:

(3) When the reception recording mode is selected, a first method for detecting the free recording capacity of the memory cartridge (memory) 1
A detection procedure, a second detection procedure for detecting a data amount of the AV data transmitted based on the TOC information transmitted from the partner station prior to the communication transmission of the AV data, and the empty space detected by the first detection procedure. (2) The portable AV device according to (2), further including a notification procedure (CPUs 14 and 17) for notifying the fact that the amount of data detected by the second detection procedure is larger than the recording capacity. .

(4) At least received AV data (compressed image data supplied from the communication line 20 or temporarily compressed by the signal processing unit 11 via the input analog circuit 13) is compressed again (duplexed Recording encoder 10 that outputs compressed received AV data by performing compression and lossless compression)
And a reproduction decoder 8 for expanding the compressed received AV data and outputting the received AV data. During recording, the compressed received AV data is recorded in the memory cartridge (memory) 1 via the recording encoder 10. , Compressed reception A output from the memory cartridge (memory) 1 during reproduction
4. The portable AV device according to claim 1, wherein V data is output via a decoder for reproduction. The portable AV device according to any one of (1), (2), and (3), which preferentially records and reproduces AV data transmitted from the communication line 20.

(5) A portable AV device B having a memory cartridge (memory) 1 for recording and reproducing audio data and / or video data (AV data) and suitable for carrying, and transmitted via a communication line 20 Received A
In addition to receiving V data, transmission AV data, which is a signal (output signal of the decoder 8 for reproduction) corresponding to the AV data read from the memory cartridge (memory) 1, is transmitted via the communication line 20 (to an external partner). Communication means for transmission (consisting of the reception / transmission buffer 22a and the ADSL adapter 21a);
a, supplied via the switch circuit 24)
A recording encoder 10 for compressing V data and outputting compressed received AV data to the memory cartridge (memory) 1 (via a memory control circuit 6); and a compressed AV read from the memory cartridge (memory) 1. A playback decoder 8 for expanding (primarily expanding) data and outputting a signal corresponding to the compressed AV data, and a signal corresponding to the compressed AV data output from the playback decoder 8 when the memory playback mode is selected. Switching output to the processing unit 11,
A switching means (consisting of switch circuits 2 and 23) for switching and outputting a signal corresponding to the compressed AV data output from the reproduction decoder 8 to the communication means when the transmission / reproduction mode is selected. Portable AV
apparatus.

(6) A portable AV device C having a memory cartridge (memory) 1 for recording and reproducing audio data and / or video data (AV data) and suitable for carrying, transmitted via a communication line 20 Received A
While receiving the V data, transmission AV data, which is a signal (output signal of the reproduction decoder 8) corresponding to the compressed AV data read from the memory cartridge (memory) 1, is transmitted via the communication line 20 to an external partner. To send (receive / transmit buffer 22a and ADSL adapter 21)
a) (a transmission / reception buffer 2)
2a, a recording encoder 10 for compressing the received AV data (supplied via the switch circuit 24) and outputting the compressed received AV data to the memory cartridge (memory) 1 (via the memory control circuit 6); A reproduction decoder 8 for expanding (primarily expanding) the compressed AV data read from the memory cartridge (memory) 1 and outputting a signal corresponding to the compressed AV data; Data is stored in the recording encoder 10
Without switching (via the switch circuits 3 and 4) to the memory cartridge (memory) 1, and when the transmission / reproduction mode is selected, the data is read out from the memory cartridge (memory) 1 (via the switch circuit 4). And outputs the compressed AV data to the communication means without passing through the reproduction decoder 8 (switch circuit 3,
A portable AV device comprising a switching means.

(7) A portable AV device C having a memory cartridge (memory) 1 for recording and reproducing audio data and / or video data (AV data) and suitable for carrying, transmitted via a communication line 20 Received A
In addition to receiving V data, transmission AV data, which is a signal (output signal of the decoder 8 for reproduction) corresponding to the AV data read from the memory cartridge (memory) 1, is transmitted via the communication line 20 (to an external partner). Communication means for transmission (consisting of the reception / transmission buffer 22a and the ADSL adapter 21a);
a, supplied via the switch circuit 24)
A recording encoder 10 for compressing V data and outputting compressed received AV data to the memory cartridge (memory) 1 (via a memory control circuit 6); and a compressed AV read from the memory cartridge (memory) 1. A playback decoder 8 for expanding (primarily expanding) data and outputting a signal corresponding to the compressed AV data; and a receiver 10 for converting the received AV data to the recording encoder 10 when a reception / recording mode is selected.
Without switching (via the switch circuits 3 and 4) to the memory cartridge (memory) 1 and output via the reproduction decoder 8 (switch circuit 2).
3) and decode-output it to the signal processing unit 11 (after that,
It is possible to monitor the received AV data being recorded via the output analog system circuit 12 and the display 12b), and when the transmission / reproduction mode is selected, the memory cartridge (memory) 1
Compressed AV read out from (via switch circuit 4)
Switching means for switching and outputting data to the communication means without passing through the reproduction decoder 8 (consisting of switch circuits 3 and 4).

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the portable AV device of the present invention will be described below in detail with reference to the drawings. 1, 6 and 8 are overall block diagrams of first, second and third embodiments of a portable AV device according to the present invention, respectively. FIG. 2 is a diagram showing a frame structure of a Q channel of TOC information. Is a flowchart showing an operation procedure in the memory reproduction mode, FIG. 4 is a flowchart showing an operation procedure in the reception reproduction mode, FIGS. 5 and 9 are flowcharts showing an operation procedure in the reception recording mode, and FIGS. 9 is a flowchart illustrating an operation procedure in a transmission / reproduction mode. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, a first embodiment to a third embodiment of a portable AV device according to the present invention will be described with reference to FIGS.

(First Embodiment) First, the portable type A shown in FIG.
V apparatus A is composed of the following parts. 1 is a memory cartridge (for example, F-EEPROM cassette), 6 is a memory control circuit, 8 is a reproduction decoder for decoding (duplex expansion, lossless expansion) AV data reproduced from the memory cartridge 1, and 10 is writing AV data A recording encoder 11 that encodes a signal (duplex compression and lossless compression), and 11 is a signal detection / EFM (Eight
a signal processing unit for demodulation / error detection / correction of a signal / MPEG encoding / decoding of DVD data, etc., 12 is an analog circuit for outputting an AV signal, 12b
Is a display, 13 is an analog circuit for inputting an AV signal, 14 is a CPU for controlling the signal processing unit 11, 15 is an operation unit, 16 is a display unit, 16a is an alarm buzzer, 17
Denotes a CPU for controlling the entire system, 21 denotes an ADSL adapter, 22 denotes a reception buffer, and 23 and 24 denote switch circuits. 20 is a communication line.

The above-described memory cartridge 1 mainly includes:
It comprises a memory section 1a, a package section 1b, a search section, and a connector section (all not shown). The memory unit 1a is configured using a so-called flash memory (for example, F-EEPROM) which is a semiconductor (solid-state) memory. The package section 1b integrally stores the memory section 1a, the search section, and the connector section. The search unit is an area (so-called user TOC) for writing information (address data, song number data, song title data, etc.) indicating an index of AV data stored in the memory unit 1a. The connector unit writes AV data (compressed AV data) from the device main body (recording encoder 10) to the memory unit 1a, transmits the AV data write / read control signal from the device main body (memory control circuit 6) to the search unit, For reading AV data (compressed AV data) from the memory section 1a to the apparatus main body (reproduction decoder 8), connection with the apparatus main body is made.

The portable AV apparatus A further includes the following:
Features (1) to (10) are provided. (1) ADSL adapter 21 described in the section of the prior art
(The specifications change depending on the type of the communication line 20)
And a communication function (transmission / reception function) for communicating with the partner station via the communication line 20. (2) A reception buffer 22 for temporarily storing AV data received by the ADSL adapter 21 is provided. (This reception buffer 22 is illustrated as if it were a reception-only buffer. The function may be the same as the function when a reception transmission buffer (not shown) shared as a transmission buffer at the time of transmission is used as a reception buffer). (3) A switch circuit 23 for switching the data input circuit to the signal processing unit 11 between the reproduction decoder 8 and the ADSL adapter 21 is provided. (4) A switch circuit 24 for switching the data input circuit to the recording encoder 10 between the signal processing unit 11 and the reception buffer 22 is provided. (5) A normal memory recording / reproduction mode and a reception recording / reproduction mode can be selectively set from the operation unit 15, and the CPU 17 switches the system mode according to each selected mode and has a program for executing a control procedure in each mode. ing. (6) The display section 16 is provided with an alarm buzzer 16a. (7) The signal processing unit 11 at the next stage of the switch circuit 23 outputs an audio signal and a video signal (A) based on the AV data supplied from the memory cartridge 1 via the reproduction decoder 8.
A reproduction signal corresponding to the V data, that is, MPEG-compressed AV data obtained by duplicating and decompressing so-called double-compressed AV data by the reproduction decoder 8 is subjected to decompression processing by MPEG and output. The video signal is output to a display 12 b (for example, an LCD) through an output analog system circuit 12.
(Liquid crystal) display) and output from a video output terminal (VIDEO OUT) to the outside.
The audio signal is output from an audio output terminal (AUDIOOUT) via the output analog circuit 12 to the outside. (8) The reproduction signal corresponding to the AV data output from the memory cartridge 1 can be selectively supplied to the signal processing unit 11 and the AV data from the communication line 20 can be selectively supplied to the (interrupt) signal processing unit 11 by request. (By switching of the switch circuit 23). (9) A reproduction decoder 8 and a recording encoder 10 are provided in addition to the compression / decompression signal processing unit 11 based on MPEG. Here, lossless compression / decompression (Huffman encoding or variable rate recording / reproduction, etc. Specializes in high-efficiency compression / expansion or compression / expansion (for example, the horizontal and vertical directions of the reproduced image) which are limited by the size of the LCD display 12b (horizontal and vertical directions) and color reproducibility by a special method that allows a slight deterioration. The data capacity is further restricted by adding compression / expansion by the method described above. Thus, for example, a portion requiring a recording capacity of 200 Mbytes (MPEG-compressed AV data) can be recorded in half of 100 Mbytes (so-called double compression). Or 2
The recording capacity of G bytes can be reduced to 1 Gbyte (short AV software requires about 100 Mbytes, but long one requires a memory capacity of about 1 Gbytes).
Therefore, a large capacity of 1 GB is required.) (10) An external audio signal and video signal which are not compressed are input to the signal processing unit 1 through the input analog system circuit 13.
The signal processing unit 11 is provided with an MPEG encoder for performing MPEG compression so that the first compression is performed by MPEG, which is the first compression at 1, and is recorded in the memory 1a. Furthermore, it is also possible to connect a video camera to perform snap recording (a still image by inputting an audio signal and a video signal supplied from the video camera). The communication line 20 is a high-speed digital line, and is a B-ISDN (Integrate
ted Service Digital Network) is used.

Hereinafter, the operation procedure in each mode by the portable AV apparatus A will be described with reference to the flowcharts shown in FIGS. 3 to 5 in (1) memory reproduction mode (shown in FIG. 3),
The description will be made in the order of (2) reception / reproduction mode (shown in FIG. 4), (3) memory recording mode, and (4) reception / recording mode (shown in FIG. 5).

(1) Memory playback mode (Operation procedure shown in FIG. 3) First, when the memory playback mode is selected and set by the operation unit 15, the CPU 17 changes the connection state of the switch circuit 23 to the playback decoder 8 side (a Side). Next, when a reproduction instruction is input from the operation unit 15 with the memory cartridge 1 set, the memory control circuit 6 reads TOC (Table of Contents) information of the memory cartridge 1 (S1, S2).

The TOC information is stored in the memory cartridge 1
(AV data,
It includes table of contents information including numbers of music and videos, time information, and the like. Like the subcoding of this data area, the Q channel has a frame structure as shown in FIG. A control bit (4 bits) and an address bit (4 bits) are added prior to the data bit (72 bits). The control bits Q1 to Q4 indicate that the memory cartridge is an audio-only memory cartridge when Q2 is "0".
"1" indicates that the memory cartridge is dedicated to audio and video (AV). In the former case, the data is recorded in the CD format, and in the latter case, the data is recorded in the DVD format.

Then, the read TOC information is fetched from the reproduction decoder 8 to the CPU 17 via the CPU 14, and the CPU 17 determines the type of the memory cartridge 1 from the contents of the control bits Q1 to Q4.

As a result of the above determination, the memory cartridge 1
Is recorded in the CD format, the CPU 17 immediately sets a CD flag and
To set the signal processing unit 11 to the CD reproduction processing mode (S3 → S4, S5). Then, the input instruction data is confirmed, and a music number or the like corresponding to the instruction data is displayed on the display unit 1.
After the display on step 6, the memory control is executed to reproduce the instruction music data (S6 to S10).

At this time, the reproduction signal is output as a D / A-converted audio signal through [memory cartridge 1 → reproduction decoder 8 → switch circuit 23 → signal processing section 11 → output analog system circuit 12]. Also, 1
Every time the reproduction of the music data for the movement is completed, the input instruction data is confirmed, and the above-described steps S6 to S10 are executed to decode and reproduce all the specified music data (S11 → S6 to S10).

On the other hand, the control bit Q of the TOC information
If Q2 is "1" as a result of the determination of 1 to Q4, the CPU 17 does not immediately determine the memory cartridge recorded in the DVD format, but the CPU 17 determines that the memory cartridge 1 is of the DVD format based on the read subheader. (S3 → S12,
S13). Further, in this case, even if the subheader indicates that the format is the DVD format, the determination is not fixed, and
The first track (only the control code or the like is recorded on the DVD) is read, and the CPU 14 checks whether or not the decoded data is MPEG data (S14, S14).
15).

Then, the confirmation result is sent from the CPU 14 to C
Notified to PU17, if it is MPEG data, CPU
17 sets a DVD flag at this stage and sets CPU 1
4, the signal processing unit 11 is set to the DVD reproduction processing mode (S16 → S17, S18).

As a result, the DVD of the memory cartridge 1
The format playback signal is [Memory cartridge 1 →
Reproduction decoder 8 → switch circuit 23 → signal processing unit 11
→ Output analog circuit 12] to output as audio signal and video signal. In this case, since the data is in the DVD format, the signal processing unit 11 expands the MPEG data and outputs the data to the output analog circuit 12.

The procedure for reproducing one chapter at a time from the memory cartridge 1 is the same as that in the case of the CD format. Then, each chapter of the data is reproduced (S19 to S24).

On the other hand, if it is determined in step S13 that the data is not in the DVD format (for example, if the data is in the CD-ROM format), or if the MP
If it is not EG data, the CP that received the notification
U17 causes the display unit 16 to display that reproduction is impossible (S13, S16 → S25).

(2) Reception / reproduction mode (Operation procedure shown in FIG. 4) First, when the reception / reproduction mode is selected and set from the operation unit 15, the CPU 17 changes the connection state of the switch circuit 23 to the reception buffer 22 side (b side). ). Next, in this reception / reproduction mode, a partner station such as an AV software service center is called via the communication line 20. More specifically, when a call instruction is given by inputting the telephone number of the partner station from the operation unit 15, the CP
U17 calls the other station via the ADSL adapter 21, and the other station answers and the call is set (S17).
31). Note that the call setting and the communication relating 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, the CPU 17
Causes the ADSL adapter 21 to execute a communication protocol that has been negotiated with the partner station in advance, and when a data link is established by communication using a regular transmission control code,
The ADSL adapter 21 is ready set to the high-speed transmission data reception mode (S32 to S34).

On the other hand, the partner station has completed preparation for data transfer when the data link is established, and the CPU 17 causes the ADSL adapter 21 to transmit a data transfer request code and shifts to the start of data reception (S35, S3).
6). In such a service network, the contents of the video or music to be serviced in a pamphlet or the like are often notified to the recipient side with a code number attached thereto. It is also possible to input a code number of a video or music and notify the code number to the service center at the stage of executing the communication protocol to select a video or music to receive a service.

By the way, the partner station transmits decoded data of CD and DVD (compressed transmission data in the case of CD, compressed transmission data in the case of DVD) through the high-speed data channel in the downstream direction (AV software service center, etc. → device A). The compressed transmission data and MPEG data) are transmitted as they are. That is, when the partner station is a service center or the like, CD and DVD decoded data are stored in a library and transmitted to the communication line 20 after the link is established by an ADSL compatible transmission system installed in the station. .

Therefore, in the portable AV apparatus A, a CD or DV
D can receive the decoded data of the memory cartridge 1 as it is and decode the data in the playback mode of the memory cartridge 1 (AV data recorded on the memory cartridge 1 in the DVD format).
Processing can be performed in the same manner as MPEG data obtained by decoding (high-efficiency expansion) data.

In the portable AV apparatus A, the switch circuit 23 connects the reception buffer 22 and the signal processing unit 11 based on the setting of the reception / reproduction mode as described above.
The received data is transferred to the signal processing unit 11. However, while the data transmission speed of the communication line 20 is constant, the data processing speed of the signal processing unit 11 fluctuates.
The CPU 17 controls the data read / transfer speed from the reception buffer 22 according to the data processing speed of the signal processing unit 11.

After the start of data reception, the partner station sets the AV
The TOC data is transmitted prior to the data transmission. The portable AV apparatus A determines whether the transmission data is in the CD format or the DVD format based on the TOC data. Regarding the procedure for setting, the procedure for confirming whether or not the transmission data corresponding to the first memory address is MPEG data and setting the DVD playback processing mode, and the procedure for playing back music or the like, the data to be played back is stored in the memory cartridge 1. Only the difference between the data and the received data is performed, and the process is executed in the same manner as in the memory reproduction mode (S38 to S5).
7).

Accordingly, in the portable AV apparatus A, the signal processing section 11 and the output analog circuit 12 can be shared in the memory reproduction mode and the reception reproduction mode, and the AV data received from the partner station can be reproduced in the reception reproduction mode. Becomes possible. In this reception / reproduction mode, if the data is not in the DVD format (S46) or if the data is not MPEG data (S48), the CPU 17 displays on the display section 16 that reproduction is not possible. Causes the ADSL adapter 21 to transmit a data transmission stop request through the control channel of the communication line 20 and disconnects the current connection line after the partner station confirms the request (S46, S48 → S55 to S5).
7).

(3) Memory Recording Mode (The operation procedure is not shown.) In this portable AV apparatus A, when the normal memory recording mode is set from the operation unit 15, the CPU 17 operates the switch circuit 24 for recording. Encoder 10 and signal processing unit 1
1 (c side) and input AV data (audio signal and video signal) to the input analog system circuit 1
3 through the signal processing unit 11 (MPEG compression),
While the memory control circuit 6 reads the memory of the signal processing unit 11, the recording signal (duplicated compressed write signal) encoded by the recording encoder 10 is transferred to the memory cartridge 1 for recording. Also, the CPU 17 outputs the AV data to a video input terminal (VIDEO IN).
In the case of a snap video (still image) input from the camera, recording is performed in a still image mode, and in the case of a moving image, recording is performed in a moving image mode. Therefore, AV data corresponding to each mode is transmitted based on the DVD standard. be able to. In this case, the signal processing unit 11 sets processing modes corresponding to the case where the input data is in the CD format and the case where the input data is in the DVD format. The details will be described in the next reception recording mode.

(4) Receiving / recording mode (operation procedure shown in FIG. 5) By the way, this portable AV apparatus A is characterized in that the AV data transmitted from the partner station via the communication line 20 in the receiving / recording mode is stored in a memory cartridge. 1 is recorded. First, when the reception and recording mode is selected and set from the operation unit 15, the CPU 17 sets the connection state of the switch circuit 24 to the reception buffer 22 side (d side) and the connection state of the switch circuit 23 to the reception buffer 22 side (b side). To When the reception / recording mode is set, the CPU 17 sets a preliminary reproduction mode, activates the memory cartridge 1 set in advance by the memory control circuit 6, and sets the U-TOC (User's Table Of) of the memory cartridge 1. Conte
(nts) The data is read, and the data is saved in the built-in memory of the CPU 17 via the CPU 14 (S61).

Next, as in the case of the above-mentioned reception / reproduction mode, a data link is established by setting up a call with the partner station and executing a communication protocol, and the ADSL adapter 21 is set to the reception ready state to make a data transfer request (S62). ). Also,
A procedure for discriminating between the CD format and the DVD format based on the TOC data after the start of data reception, a procedure for setting a CD reproduction processing mode in the case of the CD format, and a process for confirming whether the first transmission data is MPEG data or not for the DVD The procedure for setting the reproduction processing mode is executed in the same manner as in the reception reproduction mode (S63 to S65,
S72 to S75). If the data is not a DVD format (S73) or if it is not MPEG data (S7
In 5), a record disabled display is displayed on the display unit 16, and a data transmission stop request is made to the partner station to disconnect the current line (S85 to S87).

Then, in this reception recording mode, it is checked whether or not the free recording capacity of the memory cartridge 1 is enough to record all the AV data transmitted from the partner station (free recording capacity ≧ transmission AV data). It is necessary to obtain the free recording capacity of the memory cartridge 1 as a time converted value based on the U-TOC data previously saved in the built-in memory of the CPU 17, and based on the TOC data of the received AV data. The reproduction time of all the data transmitted by the above is obtained, and by comparing them, it is determined whether or not the free recording capacity of the memory cartridge 1 is sufficient (S66, S76).

As a result of the above determination, the memory cartridge 1
If the available recording capacity is sufficient (in the case of transmission AV data ≦ free recording capacity), the process shifts to recording received data in the memory cartridge 1. First, when the discrimination result based on the TOC data of the received AV data is in the CD format, the reception CD flag is turned on, the reception CD data in the reception buffer 22 is read out, and the recording encoder is read through the switch circuit 24. 10, and the received CD data is recorded on the memory cartridge 1 which is controlled in advance by the memory control circuit 6 (S67, S69).
To S71). Incidentally, even in this recording state, the data receiving speed and the recording speed to the memory cartridge 1 are different, so that
The CPU 17 controls the data read / transfer speed from the reception buffer 22 in accordance with the data recording speed.

The CPU 17 turns on the reception CD flag.
, The signal processing unit 11 is set to the CD reproduction processing mode, and 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 Is output as audio data for monitoring via the output analog system circuit 12 (S6).
8, S70).

On the other hand, if it is determined that the received data is in the DVD format (S65 to S75), the received DV
The D flag is turned on and the reception D of the reception buffer 22 is
VD data is read and transferred to the recording encoder 10,
In the same operation procedure as in the case of the CD format, the MPE
Memory cartridge 1 (after duplicating and compressing G data)
(S77-S81). Also,
The signal processing unit 11 is set to the DVD reproduction processing mode for outputting the audio / video data for monitoring (S
78).

By the way, the case where the memory cartridge 1 has a free recording capacity capable of recording all the received data has been described above (S66 → S67, S76 → S
77) If the available recording capacity is not enough (the transmission AV data> the available recording capacity), the CPU 17 immediately sounds the alarm buzzer 16a provided on the display unit 16 to notify the operator of the fact. (S66, S76
→ S82).

Further, since the partner station continues data transmission as it is, a data transmission stop request is sent to the partner station as in the case of the reception / reproduction mode, and the current connection line is disconnected (S83, S84).

Further, there are grades such as MPEG1 and MPEG2 in the data compression / expansion of the MPEG system. However, it is also possible to identify those grades and execute the processing corresponding to the identified grade in the signal processing section 11. is there. In that case, S1 in FIG.
3. At step S46 in FIG. 4 and step S73 in FIG. 5, the grade is identified, and the signal processing unit 11 is set to a processing mode corresponding to the grade. In addition, although there are a plurality of levels and profiles in MPEG2, the above-described identification can be extended to those contents, and processing corresponding to the identified level can be performed.

(Second Embodiment) A portable A shown in FIG.
The V device B adds the switch circuit 2 to the configuration of the portable AV device A shown in FIG.
Is equivalent to the configuration using the reception / transmission buffer 22a. The switch circuit 2 is connected between the output side of the reproduction decoder 8 and the input side of the reception / transmission buffer 22a. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 6, the portable AV device B
It consists of the following parts. 1 is a memory cartridge, 2, 23 and 24 are switch circuits, 6 is a memory control circuit, 8 is a reproduction decoder, 10 is a recording encoder,
1 is a signal processing unit, 12 is an output analog circuit, 12b is a display, 13 is an input analog circuit, and 14 and 17
Denotes a CPU, 15 denotes an operation unit, 16 denotes a display unit, 16a denotes an alarm buzzer, 21 denotes an ADSL adapter, and 22a denotes a reception / transmission buffer. 20 is a communication line.

The features of the portable AV apparatus B having the above-described configuration are (1) memory reproduction mode, (2) reception reproduction mode, (3) memory recording mode, (4) reception recording mode, and (5) A memory reproduction transmission mode is newly provided.

Hereinafter, (1) memory reproduction mode, (2) reception reproduction mode,
The (3) memory recording mode and (4) reception recording mode are described in the portable AV apparatus A described above ((1) memory reproduction mode, (2) reception reproduction mode, (3) memory recording mode, (4) reception Recording mode)
Only the differences will be described below, and (5) the operation procedure in the transmission / reproduction mode will be described with reference to the flowchart in FIG.

(1) Memory playback mode When the memory playback 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) and sets the connection state of the switch circuit 2 to off (to prevent the output signal of the reproduction decoder 8 from being supplied to the reception / transmission buffer 22a). Set to). The connection state of the switch circuit 24 is set to be in a floating state (a state in which the switch circuit 24 is not connected to either the c side or the d side). The following description is a portable AV device A
Since (1) the description of the memory reproduction mode is the same as that of (1), the description is omitted.

(2) Reception / reproduction mode When the memory 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 reception / transmission buffer 22a side (b side) and sets the connection state of the switch circuit 2 to off (to prevent the output signal of the reproduction decoder 8 from being supplied to the reception / transmission buffer 22a). Set to). The connection state of the switch circuit 24 is set to be in a floating state (a state in which the switch circuit 24 is not connected to either the c side or the d side). The following description is for portable AV
The description is omitted because it is the same as the description of the (2) reception / reproduction mode in the device A.

(3) Memory recording mode When the memory recording mode is selected and set from the operation unit 15,
The CPU 17 sets the connection state of the switch circuit 24 to the connection state (c side) between the recording encoder 10 and the signal processing unit 11,
The connection state of the switch circuit 2 is set to off. The following description is the same as (3) the description of the memory recording mode in the portable AV apparatus A, and thus the description thereof is omitted.

(4) Reception / recording mode When the reception / recording mode is selected and set from the operation unit 15, C
The PU 17 sets the connection state of the switch circuit 24 to the reception / transmission buffer 22a side (d side), and also sets the connection state of the switch circuit 23 to the reception / transmission buffer 22a side (b side). The following description is the same as the description of (4) the reception and recording mode in the portable AV device A, and thus the description is omitted.

(5) Transmission / reproduction mode (shown in FIG. 7) First, the CPU 17 calls a partner station to be transmitted via the communication line 20. Specifically, when the telephone number of the partner station is input from the operation unit 15 and a call instruction is given, the CPU 17
A call is made to the partner station via the SL adapter 21 and a call is set by the partner station responding (S91). Note that the call setting and the communication relating 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, the CPU 17
Causes the ADSL adapter 21 to execute a communication protocol that has been negotiated with the partner station in advance, and when a data link is established by communication using a regular transmission control code,
The ADSL adapter 21 is ready set to the high-speed transmission data transmission mode (S92 to S94).

On the other hand, when a data link with the partner station is established, the CPU 17 transmits a data transmission request code from the ADSL adapter 21 to the partner station, checks whether there is a data reception request from the partner station, and checks the data reception request from the partner station. Data transmission is started when there is a data reception request (S95, S9
6). Thus, the other station can receive the decoded data of the AV data recorded on the memory cartridge 1 in the CD or DVD format as it is. In such a network, the content of the video or music to be transmitted is often notified to the other party with a code number.
In such a case, a code number of a desired video or music is input from the operation unit 15, and the code number is notified to a partner station at the execution stage of the communication protocol to select a video or music to be transmitted. Is also possible.

Subsequently, the CPU 17 sets the connection state of the switch circuit 2 from off to on (the reproduction decoder 8).
Is set to be supplied to the reception / transmission buffer 22a). The connection state of the switch circuit 24 is set to be a floating state (a state of being not connected to either the c-side or the d-side). Next, when a reproduction instruction is input from the operation unit 15 with the memory cartridge 1 set, the memory control circuit 6 reads the TOC information of the memory cartridge 1.

Then, the read TOC information is fetched from the reproduction decoder 8 to the CPU 17 via the CPU 14, and the CPU 17 determines the type of the memory cartridge 1 from the contents of the control bits Q1 to Q4.

As a result of the above judgment, the memory cartridge 1
Is recorded in the CD format, the CPU 17 immediately sets a CD flag and
To set the signal processing unit 11 to the CD reproduction processing mode. 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 memory control is executed to reproduce the instruction music data (S9).
7).

At this time, the reproduction signal is output to the memory cartridge 1 → the reproduction decoder 8 → the switch circuit 2 → the reception / transmission buffer 22a → the ADSL adapter 21 (S9).
8).

Thereafter, each time the reproduction of the music data for one chapter is completed, the input instruction data is confirmed and the procedure described above (confirm the input instruction data and display the music number etc. corresponding to the instruction data) After displaying on the unit 16, the memory control is performed to reproduce the designated music data), and all the designated music data is decoded / reproduced and output to the output analog circuit 12 and the ADSL adapter 21. It will go (S99).

On the other hand, the control bit Q of the TOC information
If Q2 is "1" as a result of the determination of 1 to Q4, the CPU 17 does not immediately determine the memory cartridge recorded in the DVD format, but the CPU 17 determines that the memory cartridge 1 is of the DVD format based on the read subheader. Confirm whether or not. Further, in this case, even if the subheader indicates the DVD format, the determination is not determined, and the first track (only the control code or the like is recorded on the DVD) is read and the CP is read.
U14 checks whether the decoded data is MPEG data.

Then, the confirmation result is sent from the CPU 14 to C
Notified to PU17, if it is MPEG data, CPU
17 sets a DVD flag at this stage and sets CPU 1
4 sets the signal processing unit 11 to the DVD reproduction processing mode. Then, after confirming the input instruction data and displaying a number or the like corresponding to the instruction data on the display unit 16, memory control is executed to reproduce the instruction music data (S9).
7).

As a result, the DVD of the memory cartridge 1
The format reproduction signal is transmitted from the memory cartridge 1 → the reproduction decoder 8 → the switch circuit 2 → the reception / transmission buffer 2
2a is output to the ADSL adapter 21 (S98).

Thereafter, the reproduction procedure for each chapter from the memory cartridge 1 is the same as that in the case of the CD format, and the CPU 17 displays the video and music contents of the reproduction chapter specified and input from the operation unit 15. Then, each chapter is reproduced (S99).

On the other hand, in the above-described procedure for determining whether or not the data is in the DVD format, if the data is not in the DVD format (for example, if the data is in the CD-ROM format) or if the MPEG
If it is not data, the CPU 1
7 displays on the display unit 16 a non-reproducible display.

When transmission of all AV data is completed, C
The PU 17 displays on the display unit 16 that the reproduction has been completed, and sends a signal to the other station indicating that the data transmission has been completed to A
A data transmission stop request is transmitted via the control channel of the communication line 20 via the DSL adapter 21. After the partner station confirms this, disconnect the current connection line (S10
0). Thus, the portable AV apparatus B executes (5) a memory reproduction / transmission mode in addition to (1) a memory reproduction mode, (2) a reception / reproduction mode, (3) a memory recording mode, and (4) a reception / recording mode. Can be.

(Third Embodiment) A portable A shown in FIG.
The V device C has the same configuration as that of the portable AV device A shown in FIG. 1 except that the switch circuits 3 and 4 are added and the reception buffer 22 is used instead of the reception buffer 22. The switch circuit 3 is switched between one terminal of the reception / transmission buffer 22a and the input side of the reproduction decoder 8. The switch circuit 4 is connected between the memory cartridge 1 and the input side of the decoder 8 for reproduction. The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 8, the portable AV device C
It consists of the following parts. 1 is a memory cartridge, 3, 4, 23, and 24 are switch circuits, 6 is a memory control circuit, 8 is a reproduction decoder, 10 is a recording encoder, 11 is a signal processing unit, 12 is an output analog system circuit,
2b is a display, 13 is an input analog circuit, 1
4 and 17 are CPUs, 15 is an operation unit, 16 is a display unit, 16
a is an alarm buzzer, 21 is an ADSL adapter, 22
a is a reception and transmission buffer. 20 is a communication line.

The features of the portable AV apparatus C having the above configuration are (1) memory reproduction mode, (2) reception reproduction mode, (3) memory recording mode, (4) reception recording mode,
(5) It has a memory reproduction transmission mode.

Hereinafter, (1) memory reproduction mode, (2) reception reproduction mode,
The (3) memory recording mode and (4) reception recording mode are described in the portable AV apparatus A described above ((1) memory reproduction mode, (2) reception reproduction mode, (3) memory recording mode, (4) reception Recording mode)
Only the differences will be described below, and (5) the operation procedure in the transmission / reproduction mode will be described with reference to the flowchart in FIG.

(1) Memory playback mode When the memory playback mode is selected and set from the operation unit 15,
The CPU 17 sets the connection state of the switch circuit 4 to the reproduction decoder 8 (h side) and sets the connection state of the switch circuit 23 to the reproduction decoder 8 side (a side). The connection state of the switch circuit 3 is set to a floating state (a state not connected to either the e-side or the f-side), and the connection state of the switch circuit 24 is set to a floating state (a state not connected to any of the c-side or the d-side). You. The following description is portable A
The description is omitted because it is the same as the description of (1) the memory reproduction mode in the V device A.

(2) Reception / reproduction mode When the memory 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 reception / transmission buffer 22a side (b side). The connection state of the switch circuit 3 is set to a floating state, the connection state of the switch circuit 4 is set to a floating state (a state not connected to any of the g and h sides), and the connection state of the switch circuit 24 is set to a floating state. The following description is
The description is omitted because it is the same as the description of (2) the reception and reproduction mode in the portable AV device A.

(3) Memory recording mode When the memory recording mode is selected and set from the operation unit 15,
The CPU 17 sets the connection state of the switch circuit 24 to the connection state (c side) between the recording encoder 10 and the signal processing unit 11. The connection state of the switch circuit 23 is set to a floating state (a state not connected to either the a side or the b side), the connection state of the switch circuit 3 is set to a floating state, and the connection state of the switch circuit 4 is set to a floating state. The following description is the same as (3) the description of the memory recording mode in the portable AV apparatus A, and thus the description thereof is omitted.

(4) Reception / recording mode When the reception / recording mode is selected and set from the operation unit 15, C
The PU 17 sets the connection state of the switch circuit 24 to the reception / transmission buffer 22a side (d side), sets the connection state of the switch circuit 23 to the reproduction decoder 8 side (a side), and sets the connection state of the switch circuit 4 to the recording encoder 10 side. (G side). Switch circuit 3 is set in a floating state. The encoding function of the recording encoder 10 is executed by the CPU 1
4 can be controlled to pass through. The following description is the same as the description of (4) the reception and recording mode in the portable AV device A, and thus the description is omitted.

(5) Transmission / reproduction mode (shown in FIG. 10) When the transmission / reproduction mode is selected and set from the operation unit 15,
The PU 17 sets the connection state of the switch circuit 23 to the reproduction decoder 8 side (a side), the connection state of the switch circuit 4 to the memory cartridge 1 side (h side), and the switch circuit 3 sets the connection state of the reproduction encoder 8 side (f side). Set each. The switch circuit 24 is set in a floating state. This allows
The AV data reproduced from the memory cartridge 1 can be directly supplied to the reception / transmission buffer 22a (that is, the AV data reproduced from the memory cartridge 1 does not pass through the reproduction encoder 8 and switches from the switch circuit 4 to the switch circuit 4). 3, the AV data that has been duplex-compressed can be supplied to the reception / transmission buffer 22a without being subjected to duplex expansion by the reproduction encoder 8 by being supplied to the reception / transmission buffer 22a). At the same time, it is possible to monitor the AV data supplied to the reception / transmission buffer 22a that is performing transmission / reproduction (that is, the AV data reproduced from the memory cartridge 1 is switched from the switch circuit 4 to the reproduction encoder 8). The AV data to be transmitted can be monitored by being supplied to the display 12b via the → switch circuit 23 → the signal processing unit 11 → the output analog circuit 12).

In response, CPU 17 sets communication line 20
Call the other station to send via. Specifically, when the telephone number of the partner station is input from the operation unit 15 and a calling instruction is given, the CPU 17 calls the partner station via the ADSL adapter 21 and the call setting is performed by the partner station responding. This is performed (S111). Note that the call setting and the communication relating to the next communication protocol are performed at a low transmission rate using the control channel of the communication line 20.

When a call is set, the CPU 17
Causes the ADSL adapter 21 to execute a communication protocol that has been negotiated with the partner station in advance, and when a data link is established by communication using a regular transmission control code,
The ADSL adapter 21 is ready set to the high-speed transmission data transmission mode (S112 to S114).

On the other hand, when the data link with the partner station is established, the CPU 17 transmits a data transmission request code from the ADSL adapter 21 to the partner station, checks whether there is a data reception request from the partner station, and checks the data transmission request code from the partner station. Data transmission is started when there is a data reception request (S115, S115
116). In this way, the other station can receive the non-decoded data of the AV data recorded in the memory cartridge 1 in the CD or DVD format and record the data without encoding it. In such a network, the content of the video or music to be transmitted is often notified to the other party with a code number attached. In such a case, the code of the desired video or music is transmitted from the operation unit 15. It is also possible to input a number and notify the other station of the code number at the stage of executing the communication protocol to select a video or music to be transmitted.

Subsequently, when a playback instruction is input from the operation unit 15 with the memory cartridge 1 set,
The TO of the memory cartridge 1 is controlled by the memory control circuit 6.
Read the C information.

Then, the read TOC information is taken into the CPU 17 from the reproduction decoder 8 via the CPU 14, and the CPU 17 determines the type of the memory cartridge 1 from the contents of the control bits Q1 to Q4.

As a result of the above judgment, the memory cartridge 1
Is recorded in the CD format, the CPU 17 immediately sets a CD flag and
To set the signal processing unit 11 to the CD reproduction processing mode. 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 memory control is executed to reproduce the instruction music data (S11).
7).

At this time, one of the AV data corresponding to the CD format reproduced from the memory cartridge 1 is output to the switch circuit 4 → the switch circuit 3 → the receive / transmit buffer 22a → the ADSL adapter 21 → the communication line 20. Is output to the switch circuit 4 → the reproduction decoder 8 → the switch circuit 23 → the signal processing unit 11 → the output analog system circuit 12 → the audio monitor device (not shown) (S118).

Thereafter, each time the reproduction of the music data for one movement is completed, the input instruction data is confirmed and the procedure described above (the input instruction data is confirmed and the music number etc. corresponding to the instruction data is displayed on the display unit) After displaying the data on the memory 16, the memory control is executed to reproduce the instructed music data), and all the instructed music data is decoded and reproduced, and is output to the output analog circuit 12 and the ADSL adapter 21. (S119).

On the other hand, the control bit Q of the TOC information
If Q2 is "1" as a result of the determination of 1 to Q4, the CPU 17 does not immediately determine the memory cartridge recorded in the DVD format, but the CPU 17 determines that the memory cartridge 1 is of the DVD format based on the read subheader. Confirm whether or not. Further, in this case, even if the subheader indicates the DVD format, the determination is not determined, and the first track (only the control code or the like is recorded on the DVD) is read and the CP is read.
U14 checks whether the decoded data is MPEG data.

Then, the confirmation result is sent from the CPU 14 to C
Notified to PU17, if it is MPEG data, CPU
17 sets a DVD flag at this stage and sets CPU 1
4 sets the signal processing unit 11 to the DVD reproduction processing mode. Then, after confirming the input instruction data and displaying a number or the like corresponding to the instruction data on the display unit 16, the memory control is executed to reproduce the instruction data (S117).

As a result, one of the AV data corresponding to the DVD format reproduced from the memory cartridge 1 is output to the switch circuit 4 → the switch circuit 3 → the reception / transmission buffer 22a → the ADSL adapter 21 → the communication line 20, and the other is Is output to the switch circuit 4 → the decoder for reproduction 8 → the switch circuit 23 → the signal processing section 11 → the analog circuit for output 12 → the display 12b (S11
8).

Thereafter, the reproduction procedure for each chapter from the memory cartridge 1 is the same as that in the case of the CD format, and the CPU 17 displays the video of the reproduction chapter and the contents of the music which are inputted from the operation unit 15. Then, each chapter is reproduced (S119).

On the other hand, in the above-described procedure for determining whether or not the data is in the DVD format, if the data is not in the DVD format (for example, if the data is in the CD-ROM format) or if the MPEG
If it is not data, the CPU 1
7 displays on the display unit 16 a non-reproducible display.

When transmission of all AV data is completed, C
The PU 17 displays on the display unit 16 that the reproduction has been completed, and sends a signal to the other station indicating that the data transmission has been completed to A
A data transmission stop request is transmitted via the control channel of the communication line 20 via the DSL adapter 21. After the partner station confirms this, disconnect the current connection line (S12
0). Thus, the portable AV device C can execute (1) memory reproduction mode, (2) reception / reproduction mode, (3) memory recording mode, (4) reception / recording mode, and (5) memory reproduction / transmission mode. .

[0095]

According to the first aspect of the present invention, compressed and transmitted AV data distributed from a communication line and other external devices (for example, an output side of a video camera, and an uncompressed AV A connected to an external device from which data is output, the A
V data and, for example, AV data stored in a removable memory or a built-in memory (for example, a memory cartridge) of the apparatus main body can be selectively reproduced, and reproduction of AV data distributed from a communication line is performed. This memory or an external device can be played back with priority given to the interrupt, and if this memory is a solid-state memory, it can be made into a thin card-shaped one, so it can be integrated with the device body (for example, a built-in memory). , Which can be detachably stored in the main body of the apparatus), providing a lightweight and compact portable AV apparatus, and receiving AV data transmitted from a partner station via a communication line. Since the received AV data can be reproduced while sharing the built-in hardware in the normal memory reproduction mode and the reception reproduction mode, the hardware It is possible to realize a network construction of such users can enjoy a wide range of AV software by a simple operation while utilizing E A resource efficiently. According to a second aspect of the present invention, compressed and transmitted AV data distributed from a communication line and other external devices (for example, an output side of a video camera and an uncompressed AV
AV data to be reproduced (transmitted) by being connected to an external device to which data is output, for example, AV data that can be detachably attached to the device main body or selectively recorded in a built-in memory (for example, a memory cartridge). In addition, it is possible to record the AV data distributed from the communication line in a manner that gives priority to the recording of this memory or an external device. Therefore, the portable AV apparatus can be integrated with the apparatus main body (for example, built-in and can be detachably stored in the apparatus main body), and a lightweight and small portable AV apparatus can be provided. AV data transmitted from the partner station via the PC and received while sharing the built-in hardware between the normal memory recording mode and the reception recording mode The AV data because it can be played back was,
It is possible to realize a network that efficiently utilizes hardware resources and allows a user to enjoy a wide range of AV software with a simple operation. According to the third aspect of the present invention, in addition to the above-mentioned effects of the second aspect of the present invention, the free recording capacity of the memory can be detected before recording the AV data in the memory.
You can detect shortage of recording capacity when recording data,
Failure to record AV data in the memory can be prevented. The present invention described in claim 4 provides, in addition to the above-mentioned effects of the above-described claims 1, 2, and 3, a signal processing unit 11 for compression and decompression by MPEG, for example. The recording encoder 10 includes a reproduction decoder 8 and a recording encoder 10. During recording, the recording encoder 10 performs lossless compression such as Huffman coding or variable rate recording, or compression by a special method that allows slight deterioration (double Compression, for example, by performing a resolution (horizontal / vertical direction of the reproduced image) and a color reproduction method that are limited by the size of the LCD display 12b, thereby reducing the data capacity to be recorded without deteriorating the information. The size can be significantly reduced (the memory capacity can be reduced to about 1/2 compared to the conventional single compression type). 8 performs Huffman decoding, lossless decompression such as variable rate reproduction, or processing (double decompression) that is complementary to recording at the time of decompression by a special method that allows slight deterioration, thereby reproducing AV data. Conventional (single) without deteriorating
For example, the data capacity is reduced by about 1 /
2, so that the same capacity memory can record and reproduce twice as much AV data as the conventional one. The invention according to claim 5 receives AV data transmitted from a partner station via a communication line,
The AV data to be reproduced from the memory can be transmitted via a communication line, and a new function (transmission / reproduction) can be obtained by only partially revising the circuit configuration used at the time of reception / transmission. Mode), it is possible to transmit and receive AV data via a communication line without incurring a significant increase in cost, to efficiently use hardware resources and to simplify the user's operation. A network can be constructed so that a wide range of AV software can be enjoyed by operation. Also, in the transmission / reproduction mode, the contents of the memory are checked in advance, and the AV data can be transmitted to the partner station by designating the data to be transmitted, so that the communication path can be effectively utilized and the recorded data can be quickly and accurately recorded. There is an effect that simple transmission can be easily performed. According to a sixth aspect of the present invention, when the reception recording mode is selected, the received AV data is switched and output to the memory without passing through the encoder, and when the transmission / reproduction mode is selected, the compressed AV data read from the memory is transmitted. Since switching means for switching and outputting to the communication means without the intermediary of the decoder is provided, in addition to the above-described effect of the invention of claim 5, when the reception / reproduction mode is selected, for example, transmission AV data is transmitted. Even so-called duplex-compressed AV data can be transmitted without duplicating and decompressing it, so that the communication amount can be significantly reduced as compared with data transmitted by duplicating and decompressing,
Quick and accurate high-density AV transmission of transmission AV data can be performed. According to the seventh aspect of the present invention, in addition to the effect of the sixth aspect of the present invention, the AV data to be transmitted can be monitored when the transmission / reproduction mode is selected. If any inconvenience occurs, this transmission can be immediately stopped and the AV data can be transmitted again, so that the reliability of the sender at the time of transmission can be ensured.

[Brief description of the drawings]

FIG. 1 is an overall block diagram of a first embodiment of a portable AV device according to the present invention.

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

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

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

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

FIG. 6 is an overall block diagram of a second embodiment of the portable AV device of the present invention.

FIG. 7 is a flowchart showing an operation procedure in a transmission / reproduction mode.

FIG. 8 is an overall block diagram of a third embodiment of the portable AV device according to the present invention.

FIG. 9 is a flowchart illustrating an operation procedure in a reception recording mode.

FIG. 10 is a flowchart showing an operation procedure in a transmission / reproduction mode.

[Explanation of symbols]

 Reference Signs List 1 memory cartridge (memory) 2, 3, 4, 23, 24 switch circuit (switching means) 6 memory control circuit 8 reproduction decoder (decoder) 10 recording encoder (encoder) 11 signal processing unit 12 output analog system circuit 12b display 13 Input Analog System Circuit 14, 17 CPU 15 Operation Unit 17 CPU 20 Communication Line 21, 21a ADSL Adapter 22 Reception Buffer (Reception AV Data Output Means) 22a Reception Transmission Buffer A, B, C Portable AV Device

Claims (7)

(57) [Claims] 1. A portable AV device having a memory for reproducing AV data and suitable for carrying, comprising: communication means for receiving at least received AV data transmitted via a communication line; A reproduction mode selection means for selecting one of a memory reproduction mode for outputting a reproduction signal according to the AV data and a reception reproduction mode for outputting a reproduction signal according to the received AV data; Receiving AV data output means for variably outputting the received AV data in response to the AV data output from the memory when a memory reproduction mode is selected
Switching means for switching and outputting a reproduction signal in accordance with data, and switching and outputting a reproduction signal in accordance with AV data output from the reception AV data output means when a reception / reproduction mode is selected. AV equipment. 2. A portable AV device having a memory for recording AV data and suitable for carrying, comprising: communication means for receiving at least received AV data transmitted via a communication line; AV data provided in this device
Recording for selecting one of a memory recording mode for recording AV data supplied from an input means in the memory and a reception recording mode for recording received AV data transmitted via the communication line in the memory. Mode selection means, reception AV data output means for variably outputting the reception AV data in accordance with a data recording processing speed, and when the memory recording mode is selected, AV data supplied from means other than the communication means is transmitted to the memory. Switching means for switching and outputting a recording signal corresponding to AV data output from the reception AV data output means to the memory when the reception / reproduction mode is selected, and a switching means for outputting the recording signal. 3. A first detecting means for detecting a free recording capacity of the memory when a reception recording mode is selected, and an AV transmitted based on TOC information transmitted from a partner station prior to communication transmission of the AV data. A second detecting unit for detecting a data amount of data; and a notifying unit for notifying the fact that the data amount detected by the second detecting unit is larger than the free recording capacity detected by the first detecting unit. 3. The method according to claim 2, wherein
The portable AV device according to the above. 4. An encoder for compressing at least received AV data and outputting compressed received AV data, and a decoder for expanding the compressed received AV data and outputting received AV data. 3. The compressed reception AV data is recorded in said memory by said memory, and at the time of reproduction, the compressed reception AV data output from said memory is output via said decoder. Portable AV described in 3
apparatus. 5. A portable AV device having a memory for recording and reproducing AV data and suitable for carrying, comprising: receiving AV data transmitted via a communication line; and reading AV data from the memory. Communication means for transmitting transmission AV data, which is a signal corresponding to the above, via the communication line; an encoder for compressing the reception AV data and outputting compressed reception AV data to the memory; and an encoder read from the memory. A decoder that expands the compressed AV data and outputs a signal corresponding to the compressed AV data; and when a memory reproduction mode is selected, switches a signal corresponding to the compressed AV data output from the decoder to a signal processing unit and outputs the signal. And switching means for switching and outputting a signal corresponding to the compressed AV data output from the decoder to the communication means when the reproduction mode is selected. A portable AV device, comprising: 6. A portable AV device having a memory for recording and reproducing AV data and suitable for carrying, comprising: receiving a received AV data transmitted via a communication line, and reading a compressed AV data read from the memory. Communication means for transmitting transmission AV data, which is a signal corresponding to data, via the communication line; an encoder for compressing the reception AV data and outputting compressed reception AV data to the memory; and a compression read from the memory. A decoder for expanding AV data and outputting a signal corresponding to the compressed AV data; and selecting a reception / recording mode, switching the received AV data to the memory without passing through the encoder, and selecting a transmission / reproduction mode. At this time, the compressed AV data read from the memory is switched to the communication means without passing through the decoder. A portable AV device, comprising: a switching means for pressing. 7. A portable AV device having a memory for recording / reproducing AV data and suitable for carrying, which receives AV data transmitted via a communication line and reads AV data from the memory. Communication means for transmitting, via the communication line, transmission AV data which is a signal corresponding to the following; an encoder for compressing the reception AV data and outputting compressed reception AV data to the memory; and a compressed AV read from the memory. A decoder that expands data and outputs a signal corresponding to the compressed AV data; and, when a reception recording mode is selected, directly switches and outputs the received AV data to the memory without passing through the encoder, and And decodes and outputs it to the signal processing unit. When the transmission / reproduction mode is selected, the compressed AV data read from the memory Switching means for switching and outputting the data to the communication means without passing through the decoder.