JP2002027343A - Electronic apparatus with digital av function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that the desired AV stream is hard to transmit even when a second transmission bandwidth narrower than the first transmission bandwidth can be attained in order to try acquisition of the first transmission bandwidth from the bandwidth of a transmission resource of 1394-serial-bus under the transmission control of the AV stream via the 1394-serial-bus in an electronic apparatus with digital AV function. SOLUTION: When the first transmission bandwidth cannot be attained under the transmission control of the AV stream via the 1394-serial-bus, the second transmission bandwidth narrower than the obtainable bandwidth is acquired. Consequently, a transmission path of the AV stream of the second transmission bandwidth is established and the stream process of the AV stream of the second transmission bandwidth is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device with a digital AV
The present invention relates to transmission control of a V stream.

[0002]

2. Description of the Related Art In recent years, digital broadcasting services in Japan have been scheduled to begin in October 1996, with CS digital broadcasting starting in October 1996, BS digital broadcasting in December 2000, and terrestrial broadcasting in 2003. With the launch of wave digital broadcasting services, digital broadcasting is being rapidly promoted in each broadcasting infrastructure.
In the digitalization of the broadcast, MPEG2 which is a moving picture compression / expansion technique is used, and there is an advantage that a multi-channel of the broadcast is realized and the quality of broadcast content is not degraded at the time of transfer or storage. However, in order to transfer the digital contents to another device, a digital interface is required. However, there is no inexpensive general digital interface that can be used for AV equipment.

[0003] Attention has been paid to the IEEE 1394 serial bus standardized in 1995. IEEE
E1394 has a real-time transfer function of image and audio data, and is optimal as an interface for multimedia data transfer.

Further, as a control protocol for digital AV based on IEEE1394, a copy restriction system (DTCP) for copyright protection of digital contents in February 1998, and AV data in February 1998 similarly. MPEG2 stream transfer control method (IEC6
1883), AV / C command sets for mutual control between devices were established in April 1998.

[0005] Using these digital AV control protocols, 1394 in electronic equipment with a digital AV function is used.
A resource acquisition unit for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the 1394 serial bus when realizing transmission control of an AV stream via the serial bus; a predetermined output bandwidth to the 1394 serial bus; A
A plug having an output plug for establishing an output transmission line for outputting a V stream, and an input plug for establishing an input transmission line for inputting an AV stream having a predetermined input bandwidth from a 1394 serial bus. A control means, a stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to the 1394 serial bus via an output plug;
A of a predetermined input bandwidth input from the 94 serial bus
A stream input processing means for performing stream processing of the V stream; and a first output bandwidth and a first input bandwidth to the resource acquisition means as transmission control of the AV stream via the 1394 serial bus. Instructs the plug control means to acquire a first transmission bandwidth including at least one of the bandwidth and establishes a transmission path for outputting an AV stream of the first output bandwidth by the output plug to the output plug. A of the first input bandwidth by the input plug
And instructing at least one of establishing a V stream input transmission path, and instructing the stream processing means to output the first output bandwidth AV stream by the stream output processing means and the stream input processing means. It is necessary to provide a stream transmission control means for instructing at least one of the stream input processing of the AV stream of the first input bandwidth.

[0006]

However, the transmission control means of an AV stream in an electronic device with a digital AV function for executing transmission of an AV stream via a 1394 serial bus using the above-described digital AV control protocol requires resource acquisition. When the acquisition of the bandwidth by the means fails, there are the following problems.

(1) In an electronic device with a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus allows one
In order to try to obtain only a first transmission bandwidth including only one of the first output bandwidth and the first input bandwidth from the bandwidth that is the transmission path resource of the 394 serial bus, 1 of the second output bandwidth and the second input bandwidth that is smaller than the first transmission bandwidth that includes only one of the first output bandwidth and the first input bandwidth. Even if the second transmission bandwidth including only one
There is a possibility that V stream transmission cannot be executed normally.

(2) In an electronic device with a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus allows one
A first bandwidth including a first output bandwidth and a first input bandwidth from a bandwidth which is a transmission path resource of the 394 serial bus;
In order to only attempt to obtain the transmission bandwidth of the second output bandwidth and the second output bandwidth and the second output bandwidth that are smaller than the first transmission bandwidth including the first output bandwidth and the first input bandwidth. Even if the second transmission bandwidth including the input bandwidth can be acquired, there is a possibility that the intended AV stream transmission cannot be performed normally.

(3) In an electronic device with a digital AV function, bidirectional transmission control of transmission and reception of an AV stream via a 1394 serial bus is performed, and a first bandwidth is used as a transmission path resource of the 1394 serial bus. In order to only attempt to obtain a first transmission bandwidth including the output bandwidth and the first input bandwidth, a first transmission bandwidth including the first output bandwidth and the first input bandwidth is used. Second narrower than transmission bandwidth
Even if the second transmission bandwidth including the output bandwidth and the second input bandwidth can be obtained, the intended AV stream transmission may not be performed normally.

(4) In an electronic device with a digital AV function, bidirectional transmission control of transmission and reception of an AV stream via a 1394 serial bus is performed, and a first bandwidth is used as a transmission path resource of the 1394 serial bus. In order to only attempt to obtain a first transmission bandwidth including the output bandwidth and the first input bandwidth, a first transmission bandwidth including the first output bandwidth and the first input bandwidth is used. Second narrower than transmission bandwidth
A second transmission bandwidth including an output bandwidth and a second input bandwidth of the digital recording can be obtained, and one of the two directions, transmission and reception, is related to important digital recording. AV
Even in the case of stream transmission, there is a possibility that AV stream transmission related to important digital recording cannot be performed normally.

The object of the present invention is to eliminate the above problems and to provide the following.

(1) In an electronic device with a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus is performed, and
Even when trying to obtain a transmission bandwidth including only one of the output bandwidth and the input bandwidth from the bandwidth that is the transmission path resource of the 394 serial bus, the intended A
It is to execute V stream transmission reliably.

(2) In an electronic device having a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus is performed, and
Even when trying to obtain a transmission bandwidth including an output bandwidth and an input bandwidth from a bandwidth that is a transmission path resource of the 394 serial bus, the intended AV stream transmission is to be executed reliably.

(3) In an electronic device with a digital AV function, bidirectional transmission control of transmission and reception of an AV stream via a 1394 serial bus is performed, and the output bandwidth is changed from the bandwidth which is the transmission path resource of the 1394 serial bus. Even when trying to obtain a transmission bandwidth including the width and the input bandwidth, the intended AV stream transmission is to be executed reliably.

(4) In the electronic device with a digital AV function of the above object (3), even if one of the two-way AV stream transmission is related to important digital recording, the AV related to important digital recording is performed. It is to execute stream transmission reliably.

[0016]

In order to achieve the object of the present invention, the following means are provided.

(1) To achieve the above object (1), 1
A resource acquisition unit for acquiring a predetermined transmission bandwidth from a bandwidth that is a transmission line resource of the 394 serial bus;
An output plug for establishing an output transmission path for outputting an AV stream having a predetermined output bandwidth to the 94 serial bus, and an AV plug having a predetermined input bandwidth from the 1394 serial bus.
A plug control means having at least one of an input plug for establishing an input transmission path for inputting a stream, and a stream of an AV stream having a predetermined output bandwidth to be output to a 1394 serial bus via an output plug Stream processing means having at least one of a stream output processing means for performing processing, and a stream input processing means for performing stream processing of an AV stream having a predetermined input bandwidth inputted from a 1394 serial bus via an input plug As transmission control of the AV stream via the 1394 serial bus, the first
Of the first transmission bandwidth including only one of the output bandwidth and the first input bandwidth, and instructs the plug control means to output the first output bandwidth by the output plug. A
Instructs only one of the establishment of the transmission line for the output of the V stream and the establishment of the transmission line for the input of the AV stream of the first input bandwidth by the input plug, and instructs the stream processing means to execute the stream output processing means. Stream transmission control means for instructing execution of only one of a stream output process of an AV stream having a first output bandwidth by the first output bandwidth and a stream input process of an AV stream having the first input bandwidth by the stream input processing means. In the electronic device with a digital AV function having a stream transmission control means,
In the transmission control of the AV stream via the 1394 serial bus, the first transmission bandwidth including only one of the first output bandwidth and the first input bandwidth for instructing the resource acquisition unit to execute the acquisition. If the bandwidth is wider than the available bandwidth,
Instructs the resource acquisition unit to acquire a second transmission bandwidth including only one of the second output bandwidth and the second input bandwidth that is equal to or less than the obtainable bandwidth, and performs plug control. Means for establishing an output transmission path for an AV stream having a second output bandwidth by an output plug and establishing an input transmission path for an AV stream having a second input bandwidth by an input plug. To the stream processing means,
A of the second output bandwidth by the stream output processing means
Only one of the stream output processing of the V stream and the stream input processing of the AV stream of the second input bandwidth by the stream input processing means is instructed to be executed.

(2) In order to achieve the above object (2), 1
A resource acquisition unit for acquiring a predetermined transmission bandwidth from a bandwidth that is a transmission line resource of the 394 serial bus;
An output plug for establishing an output transmission path for outputting an AV stream having a predetermined output bandwidth to the 94 serial bus, and an AV plug having a predetermined input bandwidth from the 1394 serial bus.
A plug control means having an input plug for establishing an input transmission path for inputting a stream, and a stream output for performing stream processing of an AV stream having a predetermined output bandwidth to be output to a 1394 serial bus via an output plug Stream processing means for performing stream processing of an AV stream having a predetermined input bandwidth input from the 1394 serial bus via an input plug, and a stream input processing means for processing the AV stream via the 1394 serial bus. As transmission control, the resource acquisition unit is instructed to execute the acquisition of the first transmission bandwidth including the first output bandwidth and the first input bandwidth, and the plug control unit is instructed to acquire the first transmission bandwidth by the output plug. 1 establishes an output transmission path for an AV stream having an output bandwidth of 1
And instructing the stream processing means to output the AV stream having the first output bandwidth by the stream output processing means and the stream input processing means. And a stream transmission control means for instructing execution of only one of the stream input processing of the AV stream having the first input bandwidth by the 1394 serial bus. The first transmission bandwidth including the first output bandwidth and the first input bandwidth for instructing the resource acquisition means to execute acquisition in the AV stream transmission control via If the bandwidth is wider, the second transmission bandwidth including the second output bandwidth and the second input bandwidth equal to or less than the obtainable bandwidth is transmitted to the resource acquisition unit. And execution instruction to acquire the band width, the plug control unit, the second output bandwidth by the output plug AV
It instructs the establishment of a stream output transmission path and the establishment of an AV stream input transmission path of the second input bandwidth by the input plug, and instructs the stream processing means to output the second output bandwidth by the stream output processing means. Only one of the stream output processing of the AV stream of the bandwidth and the stream input processing of the AV stream of the second input bandwidth by the stream input processing means is instructed to be executed.

(3) In order to achieve the above object (3), 1
A resource acquisition unit for acquiring a predetermined transmission bandwidth from a bandwidth that is a transmission line resource of the 394 serial bus;
An output plug for establishing an output transmission path for outputting an AV stream having a predetermined output bandwidth to the 94 serial bus, and an AV plug having a predetermined input bandwidth from the 1394 serial bus.
A plug control means having an input plug for establishing an input transmission path for inputting a stream, and a stream output for performing stream processing of an AV stream having a predetermined output bandwidth to be output to a 1394 serial bus via an output plug Stream processing means for performing stream processing of an AV stream having a predetermined input bandwidth input from the 1394 serial bus via an input plug, and a stream input processing means for processing the AV stream via the 1394 serial bus. As transmission control, the resource acquisition unit is instructed to execute the acquisition of the first transmission bandwidth including the first output bandwidth and the first input bandwidth, and the plug control unit is instructed to acquire the first transmission bandwidth by the output plug. 1 establishes an output transmission path for an AV stream having an output bandwidth of 1
And instructing the stream processing means to output the AV stream having the first output bandwidth by the stream output processing means and the stream input processing means. And a stream transmission control unit for instructing execution of a stream input process of an AV stream having a first input bandwidth according to the following. In the transmission control, when the first transmission bandwidth including the first output bandwidth and the first input bandwidth for instructing the resource acquisition means to execute acquisition is wider than the obtainable bandwidth, the resource acquisition means The acquisition of the second transmission bandwidth including the second output bandwidth and the second input bandwidth equal to or less than the obtainable bandwidth is performed. And instructs the plug control means to establish an output transmission path for an AV stream having a second output bandwidth by the output plug and to establish an input transmission path for an AV stream having the second input bandwidth by the input plug. And instructs the stream processing means to perform stream output processing of the AV stream having the second output bandwidth by the stream output processing means and stream input processing of the AV stream having the second input bandwidth by the stream input processing means. To execute.

(4) In order to achieve the above object (4), in the electronic device with digital AV function according to the above means (3), the stream transmission control means includes a second output bandwidth instructed to each means. When only one of the second input bandwidth and the second input bandwidth is reserved in connection with the digital recording, the second output bandwidth or the second input not related to the digital recording instructing each means. The bandwidth for use is set to a value narrower than the first output bandwidth or the input first bandwidth, or to 0 or to a value equal to 0 without limit.

(5) In order to achieve the above-mentioned object (4), in the electronic device with digital AV function according to the above-mentioned means (3), the stream transmission control means comprises a first output bandwidth designated to each means. And the first input bandwidth
If only one of them is secured in connection with digital recording, the second output bandwidth or the second input bandwidth not related to digital recording instructed to the resource acquisition means is set to 0 and the plug control means is set to 0. Establishing a transmission path for outputting an AV stream of the second output bandwidth using an output plug not related to digital recording to
Stream output processing of the AV stream of the second output bandwidth by the stream output processing means not related to digital recording to the stream processing means without instructing execution of establishment of the input transmission path of the AV stream of the input bandwidth of Alternatively, it does not instruct the stream input processing means to execute the stream input processing of the AV stream of the second input bandwidth.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a configuration of a system for explaining the present invention will be described.

FIG. 1 is a diagram showing an example of a configuration of a system for explaining the present invention.

As shown in FIG. 1, the present system includes a digital recording / reproducing apparatus 200 for recording and reproducing digital AV data, and a digital broadcast receiver 300 for receiving a digital broadcast program using a communication satellite or a terrestrial wave. , Analog TV 40 for displaying broadcast programs and recorded / reproduced data
0. Then, the recording / reproducing apparatus 200 and the broadcast receiver 300 are connected by the 1394 bus 100,
The analog output terminal of the recording / reproducing apparatus 200 and the analog input terminal of the broadcast receiver 300 are connected by a conventional analog cable 120a. Further, an analog cable 120b is connected between an analog output terminal of the broadcast receiver 300 and an analog input terminal of the TV 400.

Next, an example of the configuration of the digital recording / playback apparatus 200 will be described with reference to FIG.

A digital recording / reproducing apparatus 200 as one embodiment of the present invention includes a tuner receiving section 201, an analog input section 202, a digital input / output section 203, and an analog output section 2.
04, a recording / playback processing unit 205, an OSD processing unit 206,
Remote control communication unit 207, recording input switch unit 208, output switch unit 209, analog input terminal 217, analog output terminal 218, digital terminal 219, control unit 220
Consists of

The tuner receiving section 201 is a section for receiving a broadcast program of a desired channel.

The analog input section 202 is a section for receiving analog AV data from the outside via the analog input terminal 217.

The digital input / output section 203 is a section for transmitting and receiving various control commands and digital AV data to and from other devices connected to the 1394 bus 100 via the digital terminal 219.

The analog output section 204 is a section for outputting analog AV data to the outside via the analog output terminal 218.

The recording / playback processing unit 205 is a part that records analog / digital AV data and plays back the recorded AV data.

The OSD processing unit 206 superimposes a character string message or the like on analog AV data of broadcast data and reproduction data when necessary, and outputs a menu setting screen, a tape navigation screen, a timer reservation content screen, and the like. It is.

Remote control communication section 207 is a section for receiving a remote control code when a user operates apparatus 200 using a remote control.

The recording input switch section 208 is a section for switching AV data input to the recording / playback processing section 205. The switch unit 208 includes a terminal 210 for inputting digital AV data received by the digital input / output unit 203, a terminal 211 for inputting broadcast data received by the tuner receiving unit 201, and an analog input unit 202 for receiving analog AV data received from the outside. Input terminal 212 and terminal 2
It comprises a switch terminal 213 for selecting the one to be actually input to the recording / playback processing unit 205 among the 10-212.

The output switch section 209 is a section for switching AV data output from the apparatus 200. The switch unit 209 is connected to a terminal 21 for inputting recorded AV data.
4. A terminal 215 for directly inputting the AV data input by the recording input switch unit 208 without passing through the recording / reproducing processing unit 205, and among the terminals 214 to 215, actually to the digital input / output unit 203 and the OSD processing unit 206. It comprises a switch terminal 216 for selecting what to input.

The control unit 220 is a part that performs the operation control of the above-mentioned 201 to 209, the function execution processing of the entire apparatus 200, and the control processing.

Next, an example of the configuration of the digital broadcast receiver 300 will be described with reference to FIG.

A digital broadcast receiver 300 as one embodiment of the present invention includes a tuner receiving section 301, an analog input section 302, a digital input / output section 303, and an analog output section 30.
4, a decoder 305, an OSD processing unit 306, a remote control communication unit 307, a decoder input switch unit 308, an output switch unit 309, an analog input terminal 313, an analog output terminal 314, a digital terminal 315, and a control unit 316.

The tuner receiving section 301 is a section for selecting a desired channel from a plurality of channels through which a digital broadcast program is transmitted.

The analog input section 302 is a section for receiving analog AV data from the outside via the analog input terminal 313.

The digital input / output section 303 is a section for transmitting and receiving various control commands and digital AV data to and from other devices connected to the 1394 bus 100 via the digital terminal 315.

The analog output section 304 is a section for outputting analog AV data to the outside via the analog output terminal 314.

The decoder 305 outputs the digitally modulated A
This is a part for demodulating V data.

The OSD processing unit 306 is a unit that superimposes a character string message or the like on the broadcast data demodulated by the decoder 305 and outputs a menu setting screen, an EPG screen, a timer reservation content screen, and the like when necessary.

Remote control communication section 307 is a section for receiving a remote control code when a user operates receiver 300 using a remote control.

The decoder input switch section 308 is a section for switching digital AV data input to the decoder 305. The switch unit 308 includes a tuner receiving unit 301
Terminal 317 for inputting digital broadcast data received at
It comprises a terminal 318 for inputting digital AV data received by the digital input / output unit 303, and a switch terminal 319 for selecting one of the terminals 317 to 318 to be actually input to the decoder 305.

The output switch unit 309 is connected to the receiver 300
This is a part for switching AV data output from. The switch unit 309 includes a terminal 310 for inputting analog AV data output from the decoder 305, and an analog input unit 30.
Terminal 31 for inputting analog AV data received at 2
1, and a switch terminal 312 for selecting one of the terminals 310 to 311 that is actually input to the OSD processing unit 306
Consists of

The control unit 316 is a part that performs the operation control of the above-mentioned 301 to 309 and the function execution processing and control processing of the entire receiver 300.

Next, referring to FIG.
One configuration example of 00 will be described. The analog TV 400 as one embodiment of the present invention includes a tuner receiving unit 401,
It comprises an analog input unit 402, a video / audio output unit 403, a remote control communication unit 404, an input switch unit 412, an output switch unit 413, and a control unit 405.

The tuner receiving section 401 is a section for receiving a broadcast program of a desired channel.

An analog input section 402 receives an analog A signal from an external device via an analog input terminal 412 or 413.
This is a part for receiving V data.

The video / audio output section 403 is a section for actually outputting AV data to a monitor, a speaker, or the like.

Remote control communication section 404 is a section for receiving a remote control code when a user operates TV 400 using a remote control.

The input switch section 412 is a section for switching the AV data input to the analog input section 402.
The switch unit 412 includes a terminal 406 for inputting AV data received via the analog input terminal 412, a terminal 407 for inputting AV data received via the analog input terminal 413, and terminals 412 to 413. The input unit 402 includes a switch terminal 408 for selecting an input to the input unit 402.

The output switch section 413 is a section for switching AV data to be output on the TV. Switch part 41
Reference numeral 3 denotes a terminal 409 for inputting broadcast data received by the tuner receiving unit 401, a terminal 410 for inputting AV data output from the analog input unit 402, and terminals 409 to 409.
The switch 410 includes a switch terminal 411 for selecting a signal to be actually input to the video / audio output unit 403 among the signals 410.

The control section 405 is a section for performing control processing of the above-described processing sections and switch section, and processing for executing functions of the entire TV 400.

Next, referring to FIG. 5, the digital input / output unit 303 and the control unit 316 in the digital broadcast receiver 300 will be described.
A configuration example will be described.

FIG. 5 shows a configuration example of the digital input / output unit and the control unit in the digital broadcast receiver.

The digital input / output unit 303 includes resource acquisition units 3031 and 139 for acquiring a predetermined transmission bandwidth from a bandwidth that is a transmission path resource of the 1394 serial bus.
4 An output plug 3 for establishing an output transmission path for outputting an AV stream having a predetermined output bandwidth to a serial bus
032o, an input plug 3032i for establishing an input transmission path for inputting an AV stream of a predetermined input bandwidth from the 1394 serial bus, and a plug control means 3032 having an output plug 3032o.
Stream output processing means 3033o for performing stream processing of an AV stream having a predetermined output bandwidth to be output to the serial bus, and 1394 via an input plug 3032i
Stream input processing means 3033i for performing stream processing of an AV stream having a predetermined input bandwidth input from the serial bus;
3.

The control section 316 has a stream transmission control means 3161 for controlling the transmission of the AV stream via the 1394 serial bus.

Next, referring to FIG. 6, the AV transmission via the 1394 serial bus of the stream transmission control means 3161 will be described.
The stream transmission control procedure will be described.

FIG. 6 shows the stream transmission control means 31.
61 shows a flowchart of a procedure for controlling transmission of an AV stream via a 1394 serial bus.

In step 1, resource acquisition means 3031
To the available bandwidth.

In step 2, the first output bandwidth and the first
It is determined whether it is possible or impossible to acquire a first transmission bandwidth including at least one of the input bandwidths described above. If it is possible, the process proceeds to step 3; otherwise, the process ends. .

In step 3, resource acquisition means 3031
To execute the acquisition of the first transmission bandwidth including at least one of the first output bandwidth and the first input bandwidth.

At step 4, the plug control means 3032
The establishment of the transmission path for the output of the AV stream of the first output bandwidth by the output plug 3032o and the input plug 30
32i to establish at least one of an input transmission path for an AV stream having a first input bandwidth.

In step 5, the stream processing means 303
3, at least one of a stream output process of the first output bandwidth AV stream by the stream output processing unit 3033o and a stream input process of the first input bandwidth AV stream by the stream input processing unit 3033i. To execute.

However, the transmission control means of the AV stream in the electronic equipment with the digital AV function for executing the transmission of the AV stream via the 1394 serial bus using the digital AV control protocol requires the acquisition of the bandwidth by the resource acquisition means. There is the following problem when the operation fails.

(1) In an electronic device with a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus allows one-way transmission control.
In order to try to obtain only a first transmission bandwidth including only one of the first output bandwidth and the first input bandwidth from the bandwidth that is the transmission path resource of the 394 serial bus, 1 of the second output bandwidth and the second input bandwidth that is smaller than the first transmission bandwidth that includes only one of the first output bandwidth and the first input bandwidth. Even if the second transmission bandwidth including only one
There is a possibility that V stream transmission cannot be executed normally.

(2) In an electronic device with a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus allows one-way transmission control.
A first bandwidth including a first output bandwidth and a first input bandwidth from a bandwidth which is a transmission path resource of the 394 serial bus;
In order to only attempt to obtain the transmission bandwidth of the second output bandwidth and the second output bandwidth and the second output bandwidth that are smaller than the first transmission bandwidth including the first output bandwidth and the first input bandwidth. Even if the second transmission bandwidth including the input bandwidth can be acquired, there is a possibility that the intended AV stream transmission cannot be performed normally.

(3) In an electronic device with a digital AV function, bidirectional transmission control of transmission and reception of an AV stream via a 1394 serial bus is performed, and a first bandwidth is used as a transmission path resource of the 1394 serial bus. In order to only attempt to obtain a first transmission bandwidth including the output bandwidth and the first input bandwidth, a first transmission bandwidth including the first output bandwidth and the first input bandwidth is used. Second narrower than transmission bandwidth
Even if the second transmission bandwidth including the output bandwidth and the second input bandwidth can be obtained, the intended AV stream transmission may not be performed normally.

(4) In an electronic device with a digital AV function, bidirectional transmission control of transmission and reception of an AV stream via a 1394 serial bus is performed, and a first bandwidth is used as a transmission path resource of the 1394 serial bus. In order to only attempt to obtain a first transmission bandwidth including the output bandwidth and the first input bandwidth, a first transmission bandwidth including the first output bandwidth and the first input bandwidth is used. Second narrower than transmission bandwidth
A second transmission bandwidth including an output bandwidth and a second input bandwidth of the digital recording can be obtained, and one of the two directions, transmission and reception, is related to important digital recording. AV
Even in the case of stream transmission, there is a possibility that AV stream transmission related to important digital recording cannot be performed normally.

In the following, the above problem is solved, and the AV stream transmission according to the present invention, which can reliably execute the AV stream transmission related to the intended or important digital recording, by controlling the transmission of the AV stream via the 1394 serial bus. The transmission control procedure will be described. A description will be given of a transmission control procedure of an AV stream in a case where acquisition of an output bandwidth or an input bandwidth is attempted in unidirectional transmission control of transmission or reception of an AV stream according to the first embodiment of the present invention.

FIG. 7 is a flowchart showing a transmission control procedure of an AV stream in which the transmission bandwidth in only one direction is attempted in the one-way transmission control according to the first embodiment of the present invention.

In step 1, resource acquisition means 3031
To the available bandwidth.

In step 2, it is determined whether it is possible or impossible to obtain the first output bandwidth or the first input bandwidth. If possible, proceed to step 3;
Proceed to step 13.

At step 3, resource acquisition means 3031
To execute the acquisition of the first output bandwidth or the first input bandwidth.

At step 4, the plug control means 3032
Then, an instruction is given to establish an output transmission path for an AV stream having a first output bandwidth by the output plug 3032o or to establish an input transmission path for an AV stream having the first input bandwidth by the input plug 3032i.

In step 5, the stream processing means 303
3 instructs the stream output processing means 3033o to execute the stream output processing of the AV stream of the first output bandwidth or the stream input processing means 3033i to execute the stream input processing of the AV stream of the first input bandwidth.

At step 13, resource acquisition means 303
1 to execute the acquisition of the second output bandwidth or the second input bandwidth that is equal to or less than the obtainable bandwidth.

At step 14, the plug control means 3032
Then, an instruction is issued to establish an output transmission path for an AV stream having a second output bandwidth by the output plug 3032o or to establish an input transmission path for an AV stream having the second input bandwidth by the input plug 3032i.

At step 15, the stream processing means 30
33, the second by the stream output processing means 3033o.
Stream output processing of the AV stream having the output bandwidth of
Of stream input processing of the AV stream having the input bandwidth of.

According to the present embodiment, the transmission bandwidth including only one of the output bandwidth and the input bandwidth is controlled by the unidirectional transmission control of only one of the transmission and the reception of the AV stream. When trying to obtain the bandwidth, if the first transmission bandwidth including only one of the first output bandwidth and the first input bandwidth cannot be obtained, the first output bandwidth and the first output bandwidth are not obtained. Including only one of the bandwidth and the first input bandwidth Including only one of the second output bandwidth and the second input bandwidth that is smaller than the first transmission bandwidth Since the second transmission bandwidth is acquired, even when the first transmission bandwidth including only one of the first output bandwidth and the first input bandwidth cannot be secured, the intention is intended. AV stream transmission can be executed reliably.

According to the second embodiment of the present invention, in the transmission control of one-way transmission or reception of an AV stream, an AV stream in a case where acquisition of an output bandwidth and an input bandwidth is attempted.
The stream transmission control procedure will be described.

FIG. 8 is a flowchart showing a transmission control procedure of an AV stream in which the acquisition of a bidirectional transmission bandwidth is attempted in one-way transmission control according to the second embodiment of the present invention.

In step 1, resource acquisition means 3031
To the available bandwidth.

In step 2, the first output bandwidth and the first
It is determined whether acquisition of the input bandwidth is possible or impossible. If it is possible, the process proceeds to step 3; otherwise, the process proceeds to step 13.

At step 3, resource acquisition means 3031
To execute the acquisition of the first output bandwidth and the first input bandwidth.

In step 4, plug control means 3032
The establishment of the transmission path for the output of the AV stream of the first output bandwidth by the output plug 3032o and the input plug 30
32i to instruct the establishment of a transmission path for inputting an AV stream of the first input bandwidth.

In step 5, the stream processing means 303
3 instructs the stream output processing means 3033o to execute the stream output processing of the AV stream having the first output bandwidth and the stream input processing means 3033i to execute the stream input processing of the AV stream having the first input bandwidth.

At step 13, the resource acquisition means 303
1, the second output bandwidth equal to or smaller than the obtainable bandwidth and the second
To execute the acquisition of the input bandwidth.

At step 14, the plug control means 3032
The establishment of the transmission path for the output of the AV stream of the second output bandwidth by the output plug 3032o and the input plug 30
32i to instruct the establishment of an input transmission path for an AV stream of the second input bandwidth.

At step 15, the stream processing means 30
33, the second by the stream output processing means 3033o.
And instructs the stream input processing means 3033i to execute the stream input processing of the AV stream having the second input bandwidth.

According to the present embodiment, acquisition of a transmission bandwidth including an output bandwidth and an input bandwidth is attempted by only one transmission control of transmission and reception of an AV stream. In the case where the first transmission bandwidth including the first output bandwidth and the first input bandwidth cannot be obtained, the first output bandwidth and the first input bandwidth are not obtained. A second output bandwidth narrower than the first transmission bandwidth including
The second transmission bandwidth including the first input bandwidth is obtained even when the first transmission bandwidth including the first output bandwidth and the first input bandwidth cannot be secured. Thus, the intended AV stream transmission can be reliably performed.

Transmission control procedure of an AV stream in a case where acquisition of an output bandwidth and an input bandwidth is attempted in bidirectional transmission control of transmission and reception of an AV stream according to a third embodiment of the present invention. Will be described.

FIG. 9 is a flowchart showing a transmission control procedure of an AV stream in which bidirectional transmission control according to the second embodiment of the present invention attempts to acquire a bidirectional transmission bandwidth.

In step 1, resource acquisition means 3031
To the available bandwidth.

In step 2, the first output bandwidth and the first
It is determined whether acquisition of the input bandwidth is possible or impossible. If it is possible, the process proceeds to step 3; otherwise, the process proceeds to step 13.

In step 3, resource acquisition means 3031
To execute the acquisition of the first output bandwidth and the first input bandwidth.

In step 4, plug control means 3032
The establishment of the transmission path for the output of the AV stream of the first output bandwidth by the output plug 3032o and the input plug 30
32i to instruct the establishment of a transmission path for inputting an AV stream of the first input bandwidth.

In step 5, the stream processing means 303
3 instructs the stream output processing means 3033o to execute the stream output processing of the AV stream having the first output bandwidth and the stream input processing means 3033i to execute the stream input processing of the AV stream having the first input bandwidth.

In step 13, the resource acquisition means 303
1, the second output bandwidth equal to or smaller than the obtainable bandwidth and the second
To execute the acquisition of the input bandwidth.

At step 14, the plug control means 3032
The establishment of the transmission path for the output of the AV stream of the second output bandwidth by the output plug 3032o and the input plug 30
32i to instruct the establishment of an input transmission path for an AV stream of the second input bandwidth.

At step 15, the stream processing means 30
33, the second by the stream output processing means 3033o.
And instructs the stream input processing means 3033i to execute the stream input processing of the AV stream having the second input bandwidth.

According to the present embodiment, when the transmission bandwidth including the output bandwidth and the input bandwidth is to be acquired in the bidirectional transmission control of the transmission and reception of the AV stream, the first
In the case where the first transmission bandwidth including the output bandwidth and the first input bandwidth cannot be obtained, the second transmission bandwidth including the first output bandwidth and the first input bandwidth is not included. Since the second transmission bandwidth including the second output bandwidth and the second input bandwidth smaller than the first transmission bandwidth is obtained, the first output bandwidth and the first input bandwidth are obtained. Even when the first transmission bandwidth including the service bandwidth cannot be secured, the intended AV stream transmission can be reliably executed.

One of the transmission and reception of an AV stream according to the fourth embodiment of the present invention is a bidirectional transmission control related to important digital recording, and includes an output bandwidth and an input bandwidth. A when trying to obtain transmission bandwidth
The V stream transmission control procedure will be described.

FIG. 10 is a flowchart of a transmission control procedure of an AV stream in which bidirectional transmission control according to the second embodiment of the present invention attempts to acquire a bidirectional transmission bandwidth. In step 1, the resource acquisition unit 3031 is inquired about the available bandwidth.

In step 2, the first output bandwidth and the first output
It is determined whether the acquisition of the input bandwidth is possible or impossible. If it is possible, the process proceeds to step 3; otherwise, the process proceeds to step 12.

In step 3, resource acquisition means 3031
To execute the acquisition of the first output bandwidth and the first input bandwidth.

At step 4, the plug control means 3032
The establishment of the transmission path for the output of the AV stream of the first output bandwidth by the output plug 3032o and the input plug 30
32i to instruct the establishment of a transmission path for inputting an AV stream of the first input bandwidth.

In step 5, the stream processing means 303
3 instructs the stream output processing means 3033o to execute the stream output processing of the AV stream of the first output bandwidth or the stream input processing means 3033i to execute the stream input processing of the AV stream of the first input bandwidth.

In step 12, it is determined whether transmission or reception is related to important digital recording.
Proceed to step 13, and if received, proceed to step 23.

At step 13, the resource acquisition means 303
1 instructs execution of acquisition of a second output bandwidth equal to or less than the obtainable bandwidth.

At step 14, the plug control means 3032
Instructs the output plug 3032o to establish an output transmission path for the AV stream of the second output bandwidth.

At step 15, the stream processing means 30
33, the second by the stream output processing means 3033o.
Instructs to execute a stream output process of the AV stream having the output bandwidth of.

In step 23, the resource acquisition means 303
1 instructs execution of acquisition of a second input bandwidth equal to or less than the obtainable bandwidth.

At step 24, the plug control means 3032
Instructs the input plug 3032i to establish an input transmission path for the AV stream of the second input bandwidth.

At step 25, the stream processing means 30
33, the second by the stream input processing means 3033i.
Of stream input processing of the AV stream having the input bandwidth of.

According to this embodiment, one of the transmission and reception of the AV stream is the bidirectional transmission control related to the important digital recording, and the transmission bandwidth including the output bandwidth and the input bandwidth. When trying to obtain the bandwidth, in the case where the first transmission bandwidth including the first output bandwidth and the first input bandwidth cannot be obtained, the first output bandwidth and the first output bandwidth and the first input bandwidth are not obtained. Since the second output bandwidth or the second input bandwidth that is smaller than the first transmission bandwidth including the input bandwidth is obtained, even when the first transmission bandwidth cannot be secured, The intended AV stream transmission can be executed reliably.

The first to fourth embodiments have been described above. In the first to fourth embodiments, the digital devices are connected using the 1394 bus. However, the present invention is not limited to this. Instead, the present invention can be applied to a case where another bus such as a USB is used.

In the first to fourth embodiments,
It is a system that connects two recording and playback devices, one digital broadcast receiver, and one TV, but is not limited to this.
The present invention can be applied to other systems.

Further, in the first to fourth embodiments, the stream control means includes the plug control means in its own device,
Although the stream processing unit and the resource acquisition unit instruct various processes to be implemented, the present invention provides a stream control unit that instructs the plug control unit, the stream processing unit, and the resource acquisition unit in other devices to implement various processes. In some cases, it can be applied.

[0123]

According to the present invention, in the transmission control of an AV stream via a 1394 serial bus in an electronic device with a digital AV function, if the first transmission bandwidth cannot be obtained, the first transmission bandwidth equal to or less than the obtainable bandwidth is obtained. By acquiring the transmission bandwidth of No. 2 and establishing the transmission path of the AV stream of the second transmission bandwidth, and executing the stream processing of the AV stream of the second transmission bandwidth, In addition, the AV stream transmission related to the intended or important digital recording can be reliably executed.

(1) In an electronic device with a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus allows one-way transmission control.
Even when trying to obtain a transmission bandwidth including only one of the output bandwidth and the input bandwidth from the bandwidth that is the transmission path resource of the 394 serial bus, the intended AV stream transmission is reliably performed. I can do it.

(2) In an electronic device having a digital AV function, one-way transmission control of only one of transmission and reception of an AV stream via a 1394 serial bus is performed, and
Even when trying to acquire a transmission bandwidth including an output bandwidth and an input bandwidth from a bandwidth that is a transmission path resource of the 394 serial bus, the intended AV stream transmission can be reliably executed.

(3) In an electronic device with a digital AV function, bidirectional transmission control of transmission and reception of an AV stream via a 1394 serial bus is performed to reduce the output bandwidth from the bandwidth which is the transmission path resource of the 1394 serial bus. Even when trying to acquire a transmission bandwidth including the width and the input bandwidth, the intended AV stream transmission can be reliably performed.

(4) In the electronic device with the digital AV function of the above object (3), even if one of the two-way AV stream transmission is transmission related to important digital recording, the AV related to important digital recording is performed. Stream transmission can be executed reliably.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a system for explaining the present invention.

FIG. 2 is a diagram showing a configuration example of a digital recording / reproducing apparatus for explaining the present invention.

FIG. 3 is a diagram showing a configuration example of a digital broadcast receiver for explaining the present invention.

FIG. 4 is a diagram showing a configuration example of an analog TV explaining the present invention.

FIG. 5 is a diagram showing a configuration example of a digital input / output unit and a control unit in the digital broadcast receiver.

FIG. 6 shows 139 of the stream transmission control means 3161.
4 is a flowchart of a transmission control procedure of an AV stream via a serial bus.

FIG. 7 is a flowchart of a transmission control procedure of an AV stream that attempts to acquire a transmission bandwidth in only one direction in one-way transmission control according to the first embodiment of the present invention.

FIG. 8 is a flowchart of a transmission control procedure of an AV stream in which an attempt is made to obtain a bidirectional transmission bandwidth in one-way transmission control according to the second embodiment of the present invention.

FIG. 9 is a flowchart of a transmission control procedure of an AV stream in which bidirectional transmission control according to the second embodiment of the present invention attempts to acquire a bidirectional transmission bandwidth.

FIG. 10 is a flowchart of a transmission control procedure of an AV stream in which an attempt is made to obtain a bidirectional transmission bandwidth in bidirectional transmission control according to the second embodiment of the present invention.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takehiko Nozoe 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 5C025 AA09 AA30 DA08 in Digital Media Development Division, Hitachi, Ltd.

Claims (19)

[Claims] 1. A resource acquiring means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the own device output plug 1394 serial bus, and outputs an AV stream having a predetermined output bandwidth to the 1394 serial bus. Control means having an output plug for establishing an output transmission path for stream processing, and stream processing having stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to a 1394 serial bus via the output plug Means, as transmission control of the AV stream via the 1394 serial bus, instructs the resource acquisition means to execute the acquisition of the first output bandwidth, and instructs the plug control means of the first output bandwidth by the output plug. Instructs the establishment of the transmission path for the output of the AV stream, and outputs the stream to the stream processing means An electronic device with a digital AV function, comprising: a stream transmission control unit for instructing a processing unit to execute a stream output process of an AV stream having a first output bandwidth, wherein the stream transmission control unit comprises: In the stream transmission control, if the first transmission bandwidth including the first output bandwidth for instructing the resource acquisition unit to execute acquisition is wider than the obtainable bandwidth, the resource acquisition unit is sent to the resource acquisition unit. And instructing the plug control means to establish an output transmission path for an AV stream having the second output bandwidth. And instructing the stream processing means to execute the stream output processing of the AV stream having the second output bandwidth by the stream output processing means. Digital AV function-equipped electronic apparatus to be. 2. A resource acquisition means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the own device input plug 1394 serial bus, and inputs an AV stream having a predetermined input bandwidth from the 1394 serial bus. Control means having an input plug for establishing an input transmission path for stream processing, and stream processing having stream input processing means for performing stream processing of an AV stream having a predetermined input bandwidth input from the 1394 serial bus via the input plug Means for instructing the resource acquisition means to execute the acquisition of the first transmission bandwidth including the first input bandwidth as transmission control of the AV stream via the 1394 serial bus; To establish an input transmission path for an AV stream of the first input bandwidth by the Stream transmission control means for instructing the stream processing means to execute a stream input process of an AV stream having a first input bandwidth by the stream input processing means, wherein the stream transmission control means comprises: In the transmission control of the AV stream via the 1394 serial bus, when the first transmission bandwidth including the first input bandwidth for instructing the resource acquisition means to execute acquisition is wider than the obtainable bandwidth, the resource acquisition means And instructing the plug control means to input an AV stream having the second input bandwidth to the plug control means. And instructs the stream processing means to perform stream input processing of the AV stream of the second input bandwidth by the stream input processing means. The run instruction, the digital AV function-equipped electronic apparatus, characterized in that. 3. A resource acquisition means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the other device output plug 1394 serial bus. As transmission control of an AV stream via the 1394 serial bus, An output transmission path for instructing the resource obtaining means to obtain a first transmission bandwidth including a first output bandwidth, and outputting an AV stream having a predetermined output bandwidth to the 1394 serial bus. To the plug control means in another device having an output plug to establish the transmission line for outputting the AV stream of the first output bandwidth by the output plug, and output to the 1394 serial bus via the output plug To a stream processing means in another device having a stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be performed. An electronic device with a digital AV function having a stream transmission control unit for instructing the stream output processing unit to execute a stream output process of an AV stream having a first output bandwidth, wherein the stream transmission control unit is connected via a 1394 serial bus. If the first transmission bandwidth including the first output bandwidth for instructing the resource acquisition means in the own device to execute acquisition is wider than the obtainable bandwidth in the transmission control of the AV stream, the resource acquisition in the own device is performed. Means for obtaining a second transmission bandwidth including a second output bandwidth equal to or less than the obtainable bandwidth, and instructing the plug control means in the other device to output the second output bandwidth AV
Instructing execution of a stream output transmission path, and instructing a stream processing unit in another device to execute a stream output process of an AV stream having a second output bandwidth by the stream output processing unit. Electronic equipment with digital AV function. 4. A resource acquisition unit for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of another device input plug 1394 serial bus. As transmission control of an AV stream via the 1394 serial bus, An input transmission line for instructing the resource obtaining means to obtain a first transmission bandwidth including a first input bandwidth, and for inputting an AV stream having a predetermined input bandwidth from the 1394 serial bus. To the plug control means in another device having an input plug for establishing the first input bandwidth of the AV stream of the first input bandwidth by the input plug, and input from the 1394 serial bus through the input plug. To a stream processing means in another device having a stream input processing means for performing a stream processing of an AV stream having a predetermined input bandwidth to be performed. An electronic device with a digital AV function, comprising: a stream transmission control means for instructing the stream input processing means to execute a stream input process of an AV stream having a first input bandwidth. When the first transmission bandwidth including the first input bandwidth for instructing the resource acquisition means in the own device to execute the acquisition in the transmission control of the AV stream obtained is wider than the obtainable bandwidth, the resource acquisition in the own device is performed. Means for obtaining a second transmission bandwidth including a second input bandwidth equal to or less than the obtainable bandwidth, and instructing the plug control means in the other device to output the second input bandwidth AV
Instructing execution of a stream input transmission path, and instructing a stream processing means in another device to execute a stream input process of an AV stream having a second input bandwidth by the stream input processing means. Electronic equipment with digital AV function. 5. An own device input / output plug (output processing) resource acquisition means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the 1394 serial bus; A plug having an output plug for establishing an output transmission line for outputting an AV stream, and an input plug for establishing an input transmission line for inputting an AV stream having a predetermined input bandwidth from a 1394 serial bus. A control means, a stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to the 1394 serial bus via an output plug;
Stream input processing means for performing stream processing of an AV stream having a predetermined input bandwidth input from the 394 serial bus; and stream control means for controlling transmission of the AV stream via the 1394 serial bus. Instructs acquisition of a first transmission bandwidth including a first output bandwidth and a first input bandwidth, and instructs a plug control unit to output an AV stream of the first output bandwidth by an output plug And an input plug to establish an AV transmission stream of the first input bandwidth with an input plug, and instruct the stream processing means to output the first output bandwidth by the stream output processing means. Electronic device with a digital AV function having stream transmission control means for instructing execution of a stream output process of an AV stream having a width. The stream transmission control means includes a first output bandwidth and a first input bandwidth for instructing the resource acquisition means to execute acquisition in the AV stream transmission control via the 1394 serial bus. If the transmission bandwidth is larger than the obtainable bandwidth, the second transmission bandwidth including the second output bandwidth and the second input bandwidth equal to or less than the obtainable bandwidth is transmitted to the resource obtaining unit. And instructs the plug control means to establish a transmission path for outputting an AV stream of the second output bandwidth by the output plug and to transmit the AV stream of the second input bandwidth by the input plug to the plug control means. And an instruction to execute stream establishment of an AV stream of the second output bandwidth by the stream output processing means to the stream processing means. V function-equipped electronic apparatus. 6. A resource acquiring means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission line resource of the 1394 serial bus, and a predetermined output bandwidth to the 1394 serial bus. A plug having an output plug for establishing an output transmission line for outputting an AV stream, and an input plug for establishing an input transmission line for inputting an AV stream having a predetermined input bandwidth from a 1394 serial bus. A control means, a stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to the 1394 serial bus via an output plug;
Stream input processing means for performing stream processing of an AV stream having a predetermined input bandwidth input from the 394 serial bus; and stream control means for controlling transmission of the AV stream via the 1394 serial bus. Instructs acquisition of a first transmission bandwidth including a first output bandwidth and a first input bandwidth, and instructs a plug control unit to output an AV stream of the first output bandwidth by an output plug To establish an output transmission path of the first stream and an input plug to establish an input transmission path of an AV stream of the first input bandwidth, and to the stream processing means, the first input bandwidth by the stream input processing means. Electronic device with a digital AV function having stream transmission control means for instructing to execute a stream input process of an AV stream having a width. The stream transmission control means controls the transmission of the AV stream via the 1394 serial bus, and when the first input / output bandwidth for instructing the resource acquisition means to execute acquisition is wider than the obtainable bandwidth,
In transmission control of an AV stream via a serial bus, a first transmission bandwidth including a first output bandwidth and a first input bandwidth for instructing a resource acquisition unit to execute acquisition is an obtainable bandwidth. If the bandwidth is wider than the bandwidth, the resource acquisition unit is instructed to execute acquisition of a second transmission bandwidth including a second output bandwidth and a second input bandwidth equal to or less than the obtainable bandwidth, and the plug control is performed. Instructing the means to establish an output transmission path for an AV stream having a second output bandwidth by an output plug and to establish an input transmission path for an AV stream having a second input bandwidth by an input plug; An electronic device with a digital AV function, which instructs a stream processing unit to execute a stream input process of an AV stream having a second input bandwidth by the stream input processing unit. 7. An own device input / output plug (input / output processing) resource acquisition means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the 1394 serial bus, a predetermined output bandwidth to the 1394 serial bus And an input plug for establishing an input transmission line for inputting an AV stream having a predetermined input bandwidth from the 1394 serial bus. Plug control means; stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to the 1394 serial bus via an output plug;
Stream input processing means for performing stream processing of an AV stream having a predetermined input bandwidth input from the 394 serial bus; and stream control means for controlling transmission of the AV stream via the 1394 serial bus. Instructs acquisition of a first transmission bandwidth including a first output bandwidth and a first input bandwidth, and instructs a plug control unit to output an AV stream of the first output bandwidth by an output plug And an input plug to establish an AV transmission stream of the first input bandwidth with an input plug, and instruct the stream processing means to output the first output bandwidth by the stream output processing means. Stream input processing of the first input bandwidth by the stream output processing of the AV stream of the width and the stream input processing means In an electronic device with a digital AV function having stream transmission control means for instructing execution of processing, the stream transmission control means controls transmission of an AV stream via a 1394 serial bus to instruct resource acquisition means to execute acquisition. When the first transmission bandwidth including the first output bandwidth and the first input bandwidth is wider than the obtainable bandwidth, the second output bandwidth equal to or less than the obtainable bandwidth is transmitted to the resource obtaining means. Instructing execution of acquisition of a second transmission bandwidth including the width and the second input bandwidth, and instructing the plug control means to output the AV stream of the second output bandwidth of the second output bandwidth by the output plug. Instructs the establishment and establishment of an input transmission path for the AV stream of the second input bandwidth by the input plug, and outputs the second output to the stream processing means by the stream output processing means. Executing instruction stream input processing of the AV stream of the second input Bandwidth stream output processing and the stream input processing unit of the AV stream bandwidth, the digital AV function-equipped electronic apparatus, characterized in that. 8. An input / output plug for another device (output processing) Resource acquisition means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the 1394 serial bus, transmission control of an AV stream via the 1394 serial bus And instructs the resource acquisition means in the own device to execute the acquisition of the first transmission bandwidth including the first output bandwidth and the first input bandwidth, and outputs a predetermined output bandwidth to the 1394 serial bus. An output plug for establishing an output transmission line for outputting a bandwidth AV stream, and an input plug for establishing an input transmission line for inputting an AV stream having a predetermined input bandwidth from the 1394 serial bus. Establishing a transmission path for outputting the AV stream of the first output bandwidth by the output plug to the plug control means in the machine and the first input bandwidth by the input plug An instruction is given to establish an input transmission path for an AV stream, and a stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to a 1394 serial bus via an output plug and an input plug 13
A of a predetermined input bandwidth input from the 94 serial bus
Stream transmission control means for instructing the stream processing means having stream input processing means for performing stream processing of the V stream to execute the stream output processing of the AV stream having the first output bandwidth by the stream output processing means. In the electronic device with a digital AV function, the stream transmission control means controls the transmission of the AV stream via the 1394 serial bus, and the first output bandwidth and the first output bandwidth for instructing the resource acquisition means in the own apparatus to execute the acquisition. The first including the input bandwidth
If the transmission bandwidth is wider than the obtainable bandwidth, the second transmission including the second output bandwidth and the second input bandwidth equal to or less than the obtainable bandwidth to the resource obtaining means in the own device. And instructs the plug control means in the other device to establish an output transmission path for the AV stream of the second output bandwidth by the output plug and to establish the second input bandwidth by the input plug. Instructions to establish an AV stream input transmission path, and instructs the stream processing means in another device to execute the stream output processing of the AV stream of the second output bandwidth by the stream output processing means. Electronic equipment with digital AV function. 9. An input / output plug of another device (input processing) Resource acquisition means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the 1394 serial bus, transmission control of an AV stream via the 1394 serial bus And instructs the resource acquisition means in the own device to execute the acquisition of the first transmission bandwidth including the first output bandwidth and the first input bandwidth, and outputs a predetermined output bandwidth to the 1394 serial bus. An output plug for establishing an output transmission line for outputting a bandwidth AV stream, and an input plug for establishing an input transmission line for inputting an AV stream having a predetermined input bandwidth from the 1394 serial bus. Establishing a transmission path for outputting the AV stream of the first output bandwidth by the output plug to the plug control means in the machine and the first input bandwidth by the input plug An instruction is given to establish an input transmission path for an AV stream, and a stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to a 1394 serial bus via an output plug and an input plug 13
A of a predetermined input bandwidth input from the 94 serial bus
Stream transmission control means for instructing the stream processing means having stream input processing means for performing stream processing of the V stream to execute stream input processing of the AV stream of the first input bandwidth by the stream input processing means. In the electronic device with a digital AV function, the stream transmission control means controls the transmission of the AV stream via the 1394 serial bus, and the first output bandwidth and the first output bandwidth for instructing the resource acquisition means in the own apparatus to execute the acquisition. The first including the input bandwidth
If the transmission bandwidth is wider than the obtainable bandwidth, the second transmission including the second output bandwidth and the second input bandwidth equal to or less than the obtainable bandwidth to the resource obtaining means in the own device. And instructs the plug control means in the other device to establish an output transmission path for the AV stream of the second output bandwidth by the output plug and to establish the second input bandwidth by the input plug. Instruction to establish an AV stream input transmission path, and instruct the stream processing means in another device to execute the stream input processing of the AV stream of the second input bandwidth by the stream input processing means. Electronic equipment with digital AV function. 10. An input / output plug of another device (input / output processing) resource acquisition means for acquiring a predetermined transmission bandwidth from a bandwidth which is a transmission path resource of the 1394 serial bus, transmission of an AV stream via the 1394 serial bus As control, it instructs a resource acquisition unit in the own device to execute acquisition of a first transmission bandwidth including a first output bandwidth and a first input bandwidth, and outputs a predetermined output to a 1394 serial bus. Plug for establishing an output transmission line for outputting an AV stream having a predetermined bandwidth and an input plug for establishing an input transmission line for inputting an AV stream having a predetermined input bandwidth from the 1394 serial bus. Establishing a transmission path for outputting the AV stream of the first output bandwidth by the output plug to the plug control means in the other device, and setting the first input band by the input plug A stream output processing means for instructing the establishment of an input transmission path for an AV stream having a width and a stream output processing means for performing stream processing of an AV stream having a predetermined output bandwidth to be output to a 1394 serial bus via an output plug; Thirteen
A of a predetermined input bandwidth input from the 94 serial bus
A stream output unit having a first output bandwidth by the stream output processing unit and a first input band by the stream input processing unit are provided to the stream processing unit having the stream input processing unit for performing the stream processing of the V stream. In an electronic device with a digital AV function having stream transmission control means for instructing execution of a stream input process of an AV stream having a width, the stream transmission control means controls transmission of an AV stream via a 1394 serial bus, and A first output bandwidth including a first output bandwidth and a first input bandwidth for instructing the resource acquisition unit to execute acquisition;
If the transmission bandwidth is wider than the obtainable bandwidth, the second transmission including the second output bandwidth and the second input bandwidth equal to or less than the obtainable bandwidth to the resource obtaining means in the own device. And instructs the plug control means in the other device to establish an output transmission path for the AV stream of the second output bandwidth by the output plug and to establish the second input bandwidth by the input plug. Instructions to establish an AV stream input transmission path, and instructs the stream processing means in the other device to output the AV stream of the second output bandwidth by the stream output processing means and the second output processing by the stream input processing means. An electronic apparatus with a digital AV function, which instructs execution of stream input processing of an AV stream having an input bandwidth of (1). 11. The electronic device with a digital AV function according to claim 5, wherein the stream transmission control means sets a second input bandwidth designated to each means to a second input bandwidth. Digital A having a value smaller than the input bandwidth of 1.
Electronic equipment with V function. 12. The electronic device with digital AV function according to claim 6, wherein the input / output plug of the own device (input processing), the stream transmission control means sets the second output bandwidth designated to each means to the second output bandwidth. Digital A having a value smaller than the output bandwidth of 1.
Electronic equipment with V function. 13. An electronic device with a digital AV function according to claim 7, wherein the stream transmission control means includes a second output bandwidth designated to each means and a second output bandwidth. If only one of the two input bandwidths is reserved for digital recording, a second output bandwidth or a second input bandwidth not related to digital recording indicated to each means. The bandwidth is set to a value smaller than the first output bandwidth or the input first bandwidth.
An electronic device with a digital AV function, characterized in that: 14. The electronic device with a digital AV function according to claim 5, wherein the stream transmission control means sets the second input bandwidth designated to each means to 0. Or an electronic device with a digital AV function, wherein the value is infinitely equal to zero. 15. The electronic device with a digital AV function according to claim 6, wherein the stream transmission control means sets the second output bandwidth designated to each means to 0. Or an electronic device with a digital AV function, wherein the value is infinitely equal to zero. 16. An electronic device with a digital AV function according to claim 7, wherein the stream transmission control means includes a first output bandwidth designated to each means and a first output bandwidth. If only one of the input bandwidths is reserved for digital recording, a second output bandwidth or a second input bandwidth not related to digital recording indicated to each means. An electronic device with a digital AV function, wherein the bandwidth is set to 0 or a value infinitely equal to 0. 17. The electronic device with a digital AV function according to claim 5, wherein the stream transmission control means sets a second input bandwidth instructed to the resource acquisition means. 0
No instruction is made to establish a transmission path for inputting an AV stream of the second input bandwidth by the input plug to the plug control means. Digital AV characterized by not instructing execution of stream input processing of AV stream
Electronic equipment with functions. 18. The electronic device with a digital AV function according to claim 6, wherein the input / output plug of the own device (input processing), wherein the stream transmission control means sets a second output bandwidth instructed to the resource acquisition means. 0
And does not instruct the plug control means to establish a transmission path for the output of the AV stream of the second output bandwidth by the output plug, and to the stream processing means to set the second output bandwidth by the stream output processing means. Digital AV characterized by not instructing execution of an AV stream stream output process
Electronic equipment with functions. 19. The electronic device with a digital AV function according to claim 7, wherein the stream transmission control means includes a first output bandwidth designated by each means and a first output bandwidth. If only one of the input bandwidths is reserved in connection with the digital recording, a second output bandwidth or a second input that is not related to the digital recording and instructs the resource acquisition unit. Bandwidth to 0
And establishing a transmission path for outputting an AV stream having a second output bandwidth by an output plug not related to digital recording to the plug control means, or an input transmission path for an AV stream having a second input bandwidth by an input plug. Of the AV stream of the second output bandwidth by the stream output processing means not related to the digital recording to the stream processing means, or the second input bandwidth by the stream input processing means. An electronic device with a digital AV function, which does not instruct execution of stream input processing of the AV stream.