JP3593696B2 - Digital video playback / recording device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention reproduces a tape loaded in its own device and dubbs the tape loaded in a DVHS video deck (referred to as a partner device) connected by an IEEE 1394 serial bus cable, or copies the tape loaded in the partner device. The present invention relates to a video reproducing / recording apparatus for reproducing and dubbing a tape loaded in its own device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, video recording devices that play back a tape of a partner device and dub to a tape of the own device have been known. These video recording devices are various in order to improve the usability of a user and reduce a processing load on the device itself. Have been devised. For example, during dubbing, the presence or absence of recording on the master tape (master) for playback is checked, and when a portion without recording exceeds a predetermined time, recording is temporarily stopped, and when a recorded portion is detected, recording is performed. Is resumed, so that dubbing can be automatically performed only on the recorded portion (for example, see Japanese Patent Application Laid-Open No. 6-4935). Also, by detecting information input in advance in the vertical blanking interval of the video signal, judging the image output timing from the information and recording at an appropriate timing based on the information, the dubbing operation is facilitated. At the same time, there is known a video reproducing / recording apparatus which prevents excessive recording or recording omission at a necessary recording location (for example, see Japanese Patent Application Laid-Open No. 4-137980). Also, in response to the automatic recording mode designation signal from the signal output means, the signal input from the external video playback device is selectively switched to start the playback operation of the video playback device and start the recording operation of the own device. There is known a video recorder that controls the start of recording and automatically records the data on a magnetic tape (see, for example, Japanese Utility Model Laid-Open No. 3-37621).
[0003]
A first control unit that connects a plurality of electronic devices via a bus and manages a mode of the device; and a second control unit that processes a command / response transmitted / received via the bus. 2. Description of the Related Art There is known an electronic device in which a command for controlling an analog device created by a device is mounted on a control signal of a predetermined format by a second control device so as to reduce a load on a control device for processing the command (for example, an electronic device). And JP-A-9-51343. Here, an IEEE 1394 serial bus is known as an interface bus for connecting each electronic device, and the IEEE 1394 serial bus enables two-way communication between the devices.
[0004]
[Problems to be solved by the invention]
However, such a conventional apparatus does not have a function of confirming the operation state of the partner device in advance, appropriately controlling the own device and the partner device according to the operation state, and automatically dubbing. Therefore, for example, in a case where the other device is performing processing such as timer recording, if the user tries to reproduce the tape of the own device and dub to the tape of the other device, the timer recording of the other device is interrupted, In particular, when a user sets timer recording for a television broadcast that is broadcast only for a specific time, the timer recording is incomplete. Also, when the other party is performing processing such as timer recording, if the other party's tape is played and dubbing is performed on its own tape, the other party's timer recording is also interrupted, and the timer recording is stopped. It is incomplete. Regardless of the dubbing command from the user, even if the other device independently processes the timer recording with priority, during the timer recording, the own device performs the above-described reproduction or recording according to the user's command. , The operations of the own machine and the other machine are not linked, and dubbing is incomplete. Also, when the own device or the other device performs dubbing while waiting for timer recording, it is necessary to manually release the timer recording standby state before performing dubbing. Thereafter, when the start time of timer recording comes during the dubbing, the timer recording may fail as a result of continued dubbing. Therefore, in order to properly perform dubbing and timer recording, the user must be at the side of the apparatus and constantly check the operation state of the partner apparatus, which is inconvenient.
[0005]
The present invention has been made in order to solve the above-described problems, and inquires in advance about an operation state of a partner apparatus connected to a network via an interface bus, and performs an optimal dubbing process according to the operation state. It is an object of the present invention to provide a video playback / recording device that can automatically perform the playback.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a plurality of digital devices are connected to a network via an interface bus, thereby enabling bidirectional communication between the digital devices. Communication means for automatically recognizing the connection state of each digital device, an operation command for operating each device itself (referred to as its own device), and ID information assigned to another device to operate the corresponding device. A network system comprising an output control means for outputting an operation command, reproducing a tape loaded in the own device, and dubbing the tape loaded in a video recording device (referred to as a partner device) connected via an interface bus. In a compatible digital video playback / recording device, an interface bus for network connection with a partner device is provided. , It is the IEEE1394 serial bus,The ID information assigned to each device is given as new ID information at the time of power-on of each device and a bus reset accompanying addition or deletion of the device, and communication between the devices is performed for each ID information corresponding to each device. Made distinctly by carriers of different frequency bands,An operation key for inputting a dubbing command to execute dubbing is provided, and the output control means outputs a signal for inquiring about an operation state of the partner device via the communication means when the user inputs the dubbing command. , Judging the state of the partner machine from the response thereto, if the recording is not possible, further output a signal to inquire about the operating state of the partner machine, and if recording is possible, output a recording command to the partner machine, After receiving the notification of the completion of the recording start operation from the partner device, the reproduction of the own device is started and dubbing is performed.
[0007]
In this configuration, the own device and the partner device are connected by an IEEE1394 serial bus cable capable of two-way communication, and an operation command can be output from the own device to the partner device to remotely control the partner device. It is assumed that the ID information of the partner device is attached to the operation command, and the partner device to be controlled can be specified even when a plurality of digital devices are connected to the network. When a dubbing command is input from an operation key by a user's operation, the output control means first inquires about the operation state of the other party via the communication means and the IEEE 1394 serial bus cable, and as a result, the other party can record. At this time, a recording instruction is output to start recording. If the other party is not capable of recording, the operation status is repeatedly queried until the recording becomes possible. When the recording operation of the partner device is started, the partner device returns a signal to that effect to its own device, whereby the output control means can know that the recording start operation of the partner device has been completed. Yes, it issues a regeneration command to its own device. Thus, dubbing is performed only when the other party can record.
[0008]
According to the second aspect of the present invention, a plurality of digital devices are connected to a network via an interface bus, thereby enabling bidirectional communication between the digital devices. A communication means for automatically recognizing a connection state, an operation command for operating each device itself (referred to as an own device), and an operation command for operating a corresponding device by attaching ID information assigned to another device are output. A digital video playback system compatible with a network system that has an output control means and plays back a tape loaded in a video recording device (referred to as a partner device) connected via an interface bus, and dubs to a tape loaded in its own device. In the recording / recording device, the other device is connected to the network, and the interface bus for the connection is connected to the IEEE 139 It is a serial bus,The ID information assigned to each device is given as new ID information at the time of power-on of each device and a bus reset accompanying addition or deletion of the device, and communication between the devices is performed for each ID information corresponding to each device. Made distinctly by carriers of different frequency bands,An operation key for inputting a dubbing command to execute dubbing is provided, and the output control means outputs a signal for inquiring about an operation state of the partner device via the communication means when the user inputs the dubbing command. The response to this determines the status of the partner device. If playback is not possible, a signal is output to inquire about the operation status of the partner device. If playback is possible, recording on the own device is started and the partner device is started. , And outputs a reproduction command to perform dubbing.
[0009]
In this configuration, similarly to the first aspect, the own device and the partner device are connected by an IEEE 1394 serial bus cable capable of two-way communication, and can remotely control the partner device. It is assumed that the ID information of the partner device is attached to the operation command, and the partner device to be controlled can be specified even when a plurality of digital devices are connected to the network. When a dubbing command is input from an operation key by a user's operation, the output control means first inquires about the operation state of the other device via the communication means and the IEEE 1394 serial bus cable, and as a result, the other device can reproduce. At this time, a recording command is issued to the own device to start recording, and a reproduction command is output to the other device. If the partner device cannot reproduce, the operation state is repeatedly inquired until the reproduction becomes possible. In this way, dubbing is performed only when the other device can reproduce.
[0014]
Also,According to a third aspect of the present invention, in the digital video playback / recording apparatus according to the first aspect,A timer for counting the time is provided, and the start / end time of the timer recording is reserved by the user in the partner device, and the output control means performs the timer recording start time of the partner device during dubbing. By outputting a command to stop playback to the own device and a command to stop recording to the other device, stop dubbing, make the other device perform timer recording, and When the end time comes, after the timer recording of the partner device is terminated, a reproduction command is output to the own device, and a recording command is output to the partner device to resume dubbing. . In this configuration, timer recording is reserved for the other party, and if the timer recording reservation and the instruction related to dubbing conflict, the dubbing is temporarily suspended and timer recording is processed with priority. When the timer recording ends, a command to restart dubbing is output to the own device and the other device, and dubbing is restarted. As described above, the reproduction of the own device is stopped during the timer recording of the partner device, and the reproduction of the own device is restarted in conjunction with the recording operation of the partner device after the timer recording is completed. All will be recorded on the tape of the other machine.
[0015]
Also,According to a fourth aspect of the present invention, in the digital video playback / recording apparatus according to the second aspect,A clock for counting the time; and a storage unit for storing a timer recording start / end time reserved by the user. The output control unit receives the timer recording start time stored in the storage unit during dubbing. When this happens, dubbing is stopped by outputting a command to stop recording to the own device and a command to stop playback to the partner device, execute timer recording of own device, and execute timer recording. When the end time comes, after the timer recording of the own device is completed, a recording command is output to the own device, and a reproduction command is output to the other device to resume dubbing. In this configuration, timer recording is reserved for the own device, and when the timer recording reservation conflicts with an instruction relating to dubbing, the dubbing is temporarily suspended, and timer recording is processed with priority. When the timer recording ends, a command to restart dubbing is output to the own device and the other device, and dubbing is restarted. In this way, during the timer recording of the own device, the reproduction of the other device is stopped, and after the timer recording is completed, the reproduction of the other device is resumed in conjunction with the recording operation of the own device. All will be recorded on your own tape.
[0016]
Also,According to a fifth aspect of the present invention, in the digital video reproducing / recording apparatus according to the third aspect,When performing dubbing before the timer recording start time reserved for the partner device, the output control means releases the timer recording standby state of the partner device, outputs a reproduction command to the own device, and outputs The dubbing is executed by outputting a recording command to the apparatus, and after the dubbing is completed, the other apparatus is returned to a standby state for timer recording. In this configuration, when dubbing is to be performed before the timer recording start time reserved for the partner device, that is, while the partner device is waiting for timer recording, the standby state is released and dubbing is prioritized. Process. If the start time of the timer recording of the other device approaches during the dubbing, the dubbing is temporarily suspended and the timer recording is given priority processing as described in claim 5.
[0017]
Also,According to a sixth aspect of the present invention, in the digital video reproducing / recording apparatus according to the fourth aspect,When dubbing is performed before the timer recording start time reserved for the own device, the output control means releases the timer recording standby state of the own device, outputs a recording command to the own device, and outputs The dubbing is executed by outputting a reproduction command to the apparatus, and after the dubbing is completed, the apparatus returns to a standby state for timer recording. In this configuration, when the user wants to execute dubbing before the timer recording start time reserved for the own device, that is, while the user is waiting for the timer recording, the standby state is canceled and the dubbing is prioritized. Process. When the start time of the timer recording of the own device approaches during the dubbing, the dubbing is temporarily interrupted and the timer recording is prioritized as described in claim 6.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a network system using a video recording device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a network system according to the present invention. The network system 1 is constructed by connecting the DVHS video decks 10 and 20 via an IEEE 1394 serial bus cable (hereinafter, referred to as an IEEE 1394 cable) 2. In addition, TV monitors 19 and 29 are connected to the DVHS video decks 10 and 20, respectively.
[0020]
Each of the DVHS video decks 10 and 20 can transmit and receive information signals and control signals bidirectionally via the IEEE 1394 cable 2. If the control signals are transmitted to other devices in the network system 1, other DVHS video decks 10 and 20 can transmit other signals. Equipment can be controlled remotely. For example, the DVHS video deck 10 (the own machine) transmits a playback command to the DVHS video deck 20 (the other machine) via the IEEE1394 cable 2 so that the tape loaded in the DVHS video deck 20 can be used. , The video signal is acquired via the IEEE 1394 cable 2, and the video signal can be dubbed on a tape loaded in the DVHS video deck 10 or displayed on the TV monitor 19.
[0021]
In the present system 1, the DVHS video decks 10 and 20 are connected via an IEEE 1394 serial bus. However, it is also possible to connect various digital devices corresponding to the bus and communicate with each other. In the case where a plurality of digital devices are connected in this way, different devices are assigned different node IDs in order to distinguish and recognize the devices. This node ID is assigned as a new ID when the power of each device is turned on and a bus reset such as addition or deletion of a device is performed. The communication between the devices is distinguished by a carrier in a different frequency band for each node ID corresponding to each device.
[0022]
FIG. 2 shows a block diagram of the DVHS video decks 10 and 20 applied to the present system 1. The DVHS video deck 10 includes ports 11a and 11b for connecting the IEEE 1394 cable 2, a PHY chip 12 for encoding / decoding a digital signal such as a video signal, and a LINK chip for determining data such as a node ID described later. (Communication means, output control means) 13, CPU (output control means) 14 for controlling the entire DVHS video deck 10, and memory for storing node ID, timer recording start / end time, and timer dubbing start / end time ( Storage means) 15 and input keys 16 for the user to input the timer recording start / end time and the timer dubbing start / end time. The input key also includes a dubbing key (operation key) for inputting a dubbing command. Similarly, the DVHS video deck 20 includes ports 21a and 21b, a PHY chip 22, a LINK chip 23, a CPU 24, a memory 25, and an input key 26. Both ends of the IEEE 1394 cable 2 are connected to a port 11a of the DVHS video deck 10 and a port 21a of the DVHS video deck 20, respectively. The input keys 16 and 26 are usually provided on an input device such as a remote controller, but may be provided on an exterior panel of the DVHS video decks 10 and 20.
[0023]
Further, the control of the reproduction operation of the DVHS video deck 20 from the DVHS video deck 10 in the present invention is performed as follows. First, a control signal is transmitted from the CPU 14 to the port 11 a via the LINK chip 13 and the PHY chip 12. The control signal is attached with the node ID assigned to the DVHS video deck 20 and transmitted to the port 21a of the DVHS video deck 20 via the IEEE 1394 bus cable 2. The DVHS video deck 20 that has received the control signal through the port 21a transmits the signal to the LINK chip 23 via the PHY chip 22. Then, the LINK chip 23 recognizes that the node ID attached to the control signal is its own, and transmits this signal to the CPU 24. The CPU 24 starts the reproduction operation of the DVHS video deck 20 based on the transmitted control signal, and transmits the obtained video signal to the CPU 14 of the DVHS video deck 10 via the reverse path. The CPU 14 records the received video signal on the loaded tape or displays it on the TV monitor 19. If the node ID is not its own, the LINK chip 23 returns a control signal to the PHY chip 22, and further transmits the control signal from the port 21b to another device (not shown) connected via an IEEE 1394 cable. I do. As described above, since the DVHS video deck (other device) to be reproduced is designated and controlled by the node ID, even when three or more DVHS video decks are connected by the IEEE1394 cable, the other device is designated. And can be controlled. Further, the control of the recording operation of the DVHS video decks 10 to 20 is similarly performed.
[0024]
Next, an automatic dubbing function using the DVHS video deck 10 will be described. This automatic dubbing function allows the DVHS VCR 20 to perform recording and also plays the tape loaded in the DVHS VCR 10 by remotely controlling the DVHS VCR 20 as described above. Thus, the obtained video signal is automatically dubbed to the tape loaded in the DVHS video deck 20. This automatic dubbing is performed in response to the user pressing a dubbing key (dubbing command) or timer dubbing to start dubbing at a preset time.
[0025]
For example, when the dubbing key of the DVHS video deck 10 is pressed by a user's operation, the CPU 14 first inquires about the operation state of the DVHS video deck 20 via the IEEE1394 cable 2. As a result, when the DVHS video deck 20 can record, a recording command is output to start recording. If the DVHS VCR 20 is not capable of recording, it repeatedly inquires about the operation state until recording is possible. When the recording operation of the DVHS video deck 20 is started, the DVHS video deck 20 returns a signal to that effect to the DVHS video deck 10, whereby the CPU 14 completes the recording start operation of the DVHS video deck 20. It can know that it has done so and issues a playback command to its own machine. In this way, dubbing is performed only when the DVHS video deck 20 is capable of recording.
[0026]
A procedure for inquiring the operation state of the DVHS video deck 20 will be described with reference to a time chart shown in FIG. First, when the dubbing key is pressed by the user (# 1), a signal for confirming the operation state of the DVHS video deck 20 (the other device) is output to the other device (# 2), and the signal is received. The other party transmits a signal indicating the current state of the other party to the DVHS video deck 10 (own apparatus) (# 3). The CPU 14 of the own device that has received the above signal determines from the signal whether the other device can perform dubbing (# 4). As a result, if the other party is in the process of performing a rewind operation or some other processing (busy state) and dubbing is impossible (# 5), a signal for confirming the operating state of the other party is output to the other party again. Then, a signal indicating the current state of the other device is transmitted to the own device from the other device (# 7). Further, the CPU 14 that has received the above signal determines from the signal whether or not the other party can dub (# 8). The processes of # 6 to # 8 are repeated until dubbing becomes possible (# 9), and when dubbing becomes possible (# 9a), a recording command is issued to the other device (# 10).
[0027]
FIG. 4 shows a processing procedure of the CPU 14 in the above inquiry. When the dubbing key is pressed, the status of the partner device is inquired (# 11). If the partner device can be dubbed (recorded) (YES in # 12), a recording command is issued to the partner device (# 13). Then, the recording of the other device is started. Then, after receiving a notification of the completion of the recording start operation from the other device, the recording operation of the other device is confirmed (# 14), and the reproduction of the own device is started (# 15). If the other device cannot record in # 12 (NO in # 12), the process returns to # 11 and repeatedly inquires about the status of the other device. In this way, dubbing is performed only when the DVHS video deck 20 is capable of recording.
[0028]
Further, in the present system 1, it is possible to reproduce the tape of the DVHS video deck 20 and dub it to the tape of the DVHS video deck 10. FIG. 5 shows a processing procedure of the CPU 14 at this time. When the dubbing key is pressed, the status of the partner device is inquired (# 21). If the partner device becomes capable of dubbing (playback) (YES in # 22), recording of the own device is started (# 23). A reproduction command is issued to the other device (# 24), the reproduction of the other device is started, and the reproduction operation of the other device is confirmed by receiving a completion notification of the reproduction start operation from the other device (# 25). If the other device cannot be reproduced in # 22 (NO in # 22), the process returns to # 21 and repeatedly inquires about the state of the other device. In this way, dubbing is performed only when the DVHS video deck 10 can reproduce.
[0029]
In the present invention, for example, so-called timer recording for recording a television broadcast or the like at a time set by a user is set in advance on the DVHS video deck 10 or the DVHS video deck 20, and the dubbing operation and the If the start of timer recording overlaps, timer recording is performed with priority. The processing procedure of the timer recording interruption performed by the CPU 14 at this time will be described with reference to FIG. When the start time of timer recording approaches during dubbing (YES in # 31), a command to stop dubbing is output to the own device and the other device (# 32), and dubbing is temporarily suspended. Then, at the start time of the timer recording, a recording command is output to the own device (# 33), and the timer recording of the own device is executed (# 34). Then, when the end time of the timer recording is reached, a stop command is output to the own device (# 35), and the timer recording is stopped. Thereafter, a command to restart dubbing (reproduction command and recording command) is output to the own device and the other device (# 36), and dubbing is restarted. In this way, when the timer recording reservation and the dubbing instruction conflict (double booking state), the timer recording process is performed with priority, and after the timer recording ends, dubbing is resumed. In addition, it is possible to avoid failures in timer recording and dubbing.
[0030]
Further, in the present invention, even when the DVHS video deck 10 or the DVHS video deck 20 is waiting for timer recording, the operation of the automatic dubbing can be interrupted and processed. FIG. 7 shows a processing procedure of the CPU 14 in this case. During the timer recording standby (# 41), when the timer recording start time comes (YES in # 42), a recording command is output to the own device or the other device (# 43), and the timer recording is executed (# 44). ),finish. If the timer recording start time is not reached in # 42 (NO in # 42) and the dubbing key is pressed (YES in # 45), the standby state of the timer recording of the own apparatus or the other apparatus is released. (# 46), a dubbing command is output to the own device and the other device (# 47), and dubbing is executed (# 48). Until the dubbing ends (NO in # 49), the process returns to # 48 to continue dubbing. If the dubbing ends (YES in # 49), the process returns to # 41 and returns to the timer recording standby state. I do. If the dubbing key is not pressed (NO in # 45), the process returns to # 41, and the standby state for timer recording is maintained. In this way, dubbing can be performed even during standby for timer recording.
[0031]
The present invention is not limited to the configuration of the above embodiment, and various modifications are possible. For example, a partner device to be connected to a network may connect a plurality of video decks. In this case, it is possible to perform dubbing from a plurality of master tapes to a plurality of tapes by remote control from the own device. At this time, there is no need to change each tape during the dubbing, so that the user can take the place. Dubbing is performed automatically even when you are away.
[0032]
Further, the processing for reconfirming the state of the partner device in # 6 to # 9 shown in FIG. 3 may be omitted, and when dubbing is not possible, the processing may be ended without executing dubbing.
[0033]
Further, the digital device connected to the network by the IEEE 1394 cable 2 is not limited to a DVHS video deck, but may be a digital video camera represented by a handycam or the like. Further, the DVHS video decks 10 and 20 may be integrated with the TV monitors 19 and 29.
[0034]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the other device performs a recording operation, the state of the other device is checked before the reproduction of the own device, and the other device on the recording side is performing timer recording. Even if processing is being executed (busy state) for some reason and recording is not possible, dubbing is performed after waiting until recording becomes possible. In other words, even if the partner machine is in the process of processing, it repeatedly outputs a signal inquiring of the partner machine about the operation state and searches for the end of the process. It becomes possible to do.Also, the ID information assigned to each device is added as new ID information at the time of power-on of each device and a bus reset accompanying addition or deletion of the device, so that the output control means distinguishes and recognizes each device. It is possible to perform communication in different frequency bands.
[0035]
According to the second aspect of the present invention, when the recording operation is performed by the own device, the state of the other device is checked before performing the recording of the own device, and the other device on the reproduction side is performing a process for some reason (busy state). Therefore, even if reproduction is impossible, dubbing is performed after waiting until reproduction becomes possible. In other words, even if the partner machine is in the process of processing, it repeatedly outputs a signal inquiring of the partner machine about the operation state and searches for the end of the process. It becomes possible to do.Also, the ID information assigned to each device is added as new ID information at the time of power-on of each device and a bus reset accompanying addition or deletion of the device, so that the output control means distinguishes and recognizes each device. It is possible to perform communication in different frequency bands.
[0038]
According to the invention of claim 3,When the timer recording reservation and the dubbing instruction of the partner machine conflict, the dubbing is temporarily suspended, the timer recording is processed with priority, and after the timer recording is completed, dubbing is resumed. It is possible to avoid dubbing failure and timer recording failure due to timer recording interrupt processing.
[0039]
According to the invention of claim 4,If the timer recording reservation of your own device conflicts with the instruction regarding dubbing, the dubbing is temporarily suspended, the timer recording is processed with priority, and after the timer recording ends, dubbing is resumed, It is possible to avoid dubbing failure and timer recording failure due to timer recording interrupt processing.
[0040]
According to the invention of claim 5,When dubbing is performed during standby for timer recording reserved by the partner device, the dubbing operation is given priority, and when the dubbing operation ends, the device returns to the timer recording standby state. The dubbing can be executed by effectively using the time when the device is not operating.
[0041]
According to the invention of claim 6,When dubbing is executed during standby for timer recording reserved for the own device, the dubbing operation is processed with priority, and when the dubbing operation is completed, the timer recording standby state is restored. The dubbing can be executed by effectively using the time when the device is not operating.
[Brief description of the drawings]
FIG. 1 is a diagram showing a connection state of each DVHS video deck in a network system according to an embodiment of the present invention.
FIG. 2 is a block diagram of a DVHS video deck used as the own device and the other device in the system.
FIG. 3 is a time chart showing a procedure for confirming a state of a partner device during automatic dubbing of the DVHS video deck.
FIG. 4 is a flowchart showing an operation procedure of the CPU when the DVHS VCR is a playback side during automatic dubbing.
FIG. 5 is an exemplary flowchart showing an operation procedure of the CPU when the DVHS VCR is on the recording side during automatic dubbing.
FIG. 6 is a flowchart showing a procedure of an interruption process of timer recording during automatic dubbing of the DVHS VCR.
FIG. 7 is a flowchart showing a procedure of an automatic dubbing interrupt process during standby for timer recording of the DVHS video deck;
[Explanation of symbols]
1 network system
2 IEEE1394 cable
10 DVHS video deck (video recorder: own machine)
13 LINK chip (communication means, output control means)
14 CPU (output control means)
15 memory (storage means)
20 DVHS video deck (video playback device: partner device)

Claims (6)

Since a plurality of digital devices are connected to a network via an interface bus, bidirectional communication between the digital devices is enabled, and the connection state of each digital device is automatically recognized at the time of the network connection. Communication means, and output control means for outputting an operation command for operating each device by attaching an operation command for operating each device itself (referred to as the own device) and ID information assigned to another device; A digital video playback / recording apparatus compatible with a network system for playing back a tape loaded in the apparatus and dubbing the tape loaded in a video recording apparatus (referred to as a partner apparatus) connected via the interface bus;
An interface bus for network connection with the partner device is an IEEE 1394 serial bus,
The ID information assigned to each device is added as new ID information at the time of power-on of each device and a bus reset accompanying addition or deletion of the device, and communication between the devices is performed according to the ID information corresponding to each device. Are distinguished by carriers in different frequency bands,
An operation key for inputting a dubbing command to execute the dubbing,
The output control means, by the user, when the dubbing command is input, outputs a signal for inquiring the operation state of the partner device via the communication means, and determines the state of the partner device from a response thereto, If recording is not possible, the signal is further output to inquire about the operation state of the partner device. If recording is possible, a recording command is output to the partner device, and a notification of the completion of the recording start operation is sent from the partner device. A digital video playback / recording apparatus compatible with a network system, wherein the playback of the own apparatus is started after the reception, and dubbing is performed. Since a plurality of digital devices are connected to a network via an interface bus, bidirectional communication between the digital devices is enabled, and the connection state of each digital device is automatically recognized at the time of the network connection. Communication means, and output control means for outputting an operation command for operating the corresponding device by attaching an operation command for operating each device itself (referred to as own device) and ID information assigned to another device, In a digital video playback / recording apparatus compatible with a network system, a tape loaded in a video recording apparatus (referred to as a partner apparatus) connected via an interface bus is reproduced and dubbed to a tape loaded in its own apparatus.
An interface bus for network connection with the partner device is an IEEE 1394 serial bus,
The ID information assigned to each device is added as new ID information at the time of power-on of each device and a bus reset accompanying addition or deletion of the device, and communication between the devices is performed according to the ID information corresponding to each device. Are distinguished by carriers in different frequency bands,
An operation key for inputting a dubbing command to execute the dubbing,
The output control means, by the user, when the dubbing command is input, outputs a signal for inquiring the operation state of the partner device via the communication means, and determines the state of the partner device from a response thereto, If playback is not possible, the signal is further output to inquire about the operation state of the partner device. If playback is possible, recording on the own device is started, a playback command is output to the partner device, and dubbing is performed. A digital video playback / recording device compatible with a network system. Equipped with a clock that counts the time,
The start / end time of timer recording is reserved by the user for the partner device,
The output control means, when the start time of the timer recording of the partner device comes during the dubbing, a command to stop the reproduction to the own device, a command to stop the recording to the partner device. By outputting, the dubbing is stopped, the other party performs timer recording, and when the end time of the timer recording comes, after stopping the timer recording of the other party, a reproduction command is issued to the own apparatus. 2. The digital video reproducing / recording apparatus according to claim 1, wherein dubbing is resumed by outputting a recording command to the other apparatus . A clock for counting time, and storage means for storing a timer recording start / end time reserved by the user ,
When the timer recording start time stored in the storage unit comes during the dubbing, the output control unit issues a command to stop recording to the own device, and stops the reproduction to the other device. Stop dubbing by outputting a command to execute the timer recording of the own device, and when the end time of the timer recording comes, after the timer recording of the own device is terminated, a recording command is issued to the own device. 3. The digital video reproducing / recording apparatus according to claim 2, wherein dubbing is resumed by outputting a duplication command to the other apparatus . The output control means, when performing dubbing before the start time of the timer recording reserved for the partner device, cancels the standby state of the timer recording of the partner device, outputs a playback command to the own device, 4. The digital video playback / recording system according to claim 3, wherein dubbing is executed by outputting a recording command to the other party, and after the dubbing is completed, the other party is returned to a standby state for timer recording. Recording device . The output control means, when performing dubbing before the start time of the timer recording reserved for the own device, cancels the standby state of the timer recording of the own device, outputs a recording command to the own device, 5. The digital video reproducing / recording apparatus according to claim 4, wherein dubbing is executed by outputting a reproduction command to the partner apparatus, and the apparatus returns to a standby state for timer recording after the dubbing is completed. Recording device .

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