JPH10149668A - Editing control method and control signal converting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a digital AV equipment corresponding to buss such as 1394 buss capable of transmitting information signal and control signal coexistingly by an editing machine for analog AV signal such as an LANC- compatible editing machine. SOLUTION: Intervals among first∼third reproducing machines 1∼3, first∼second video recording machine 4, 5 and a conversion selector 6 are connected with cables of 1394 busses. Moreover, the interval between the conversion selector 6 and an editing machine 7 is connected with LANC cables 13, 14. One set of the first∼third reproducing macines is selected by the reproducing machine changeover switch 15 and one set of the first∼second video recording machines is selected by the video recording machine changeover switch 16 provided in the conversion selector 6. An editing command to be outputted from the editing machine 7 is converted into editing commands being on the 1394 buss by the conversing selector 6 to be transmitted to respective reproducing machine and respective video recording machines.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
Editing control of digital AV (audio / visual) equipment corresponding to a bus capable of transmitting information signals and control signals in a mixed manner such as a serial bus is performed by an analog AV signal editing machine such as a LANC compatible editing machine. Regarding the technology to be performed.

[0002]

2. Description of the Related Art An IEEE 1394 serial bus (hereinafter referred to as 1)
A system has been considered in which a plurality of digital devices are connected by a bus such as a 394 bus, which can transmit information signals and control signals in a mixed manner, and communication is performed between these digital devices.

FIG. 3 shows an example of such a system. This system includes a camera-integrated digital video tape recorder (hereinafter referred to as DCAM) 31, a personal computer (hereinafter referred to as personal computer) 32, a digital television receiver (hereinafter referred to as DTV) 33, and a digital video tape recorder (hereinafter referred to as DVTR). 34 to 13
They are connected by 94 bus cables 35-37.

As described above, a plurality of digital devices are
As shown in FIG. 4, signal transmission in a system connected by a bus is performed in a predetermined communication cycle (for example, 125 μsec).
c) is performed by time division multiplexing every time. This signal transmission is started when a device called a cycle master sends out a cycle start packet indicating the start of a communication cycle on the 1394 bus. The communication mode in one communication cycle includes isochronous (hereinafter referred to as "Iso") communication for transmitting information signals such as digital video signals and digital audio signals in real time, and control of operation control commands for devices and connection control commands between devices. There are two types of asynchronous (hereinafter, referred to as Async) communication in which signals are transmitted irregularly as needed. Then, the Iso packet is transmitted before the Async packet. By assigning channel numbers 1, 2, 3,... N to each of the Iso packets, a plurality of
o Data can be distinguished. All I to send
After transmission of the so packet is completed, a period until the next cycle start packet is used for transmission of the Async packet.

In the system configured as shown in FIG. 3, the digital video signal and digital audio signal reproduced by the
It can be edited and recorded on the VTR 1.

In analog AV devices such as a video tape recorder (hereinafter, referred to as VTR) for performing analog recording and a video tape recorder with integrated camera (hereinafter, referred to as camcorder), LANC (Local Application) is used.
Device control using oN Control bus system (registered trademark) is realized. For example, LA
Under the control of an editing machine (video editing controller) compatible with NC, a camcorder compatible with LANC and a reproduction signal of a VTR are switched and edited and recorded on another VTR.

[0007]

As described above, although it has been proposed to edit a video signal in a system in which a plurality of digital devices are connected by a 1394 bus, the system has not yet been commercialized. On the other hand, LA
A system for editing a video signal using an NC-compatible device has been commercialized for a long time.

Accordingly, the present invention provides control of digital AV equipment corresponding to a bus capable of transmitting information signals and control signals in a mixed manner, such as a 1394 bus, by editing an analog AV signal for an analog AV signal such as a LANC-compatible editing machine. It is intended to be able to control by machine.

[0009]

SUMMARY OF THE INVENTION An editing control method according to the present invention is directed to a system in which a plurality of digital AV devices are connected by a bus capable of transmitting information signals and control signals. An editing machine for an analog AV signal and a control signal conversion device for converting an output control signal of the editing machine into a control signal corresponding to the bus when transmitting to a recording machine for editing and recording; The editing control is performed by converting an output control signal of the editing machine into a control signal corresponding to the bus by a control signal conversion device and supplying the control signal to a reproducing machine and a recorder.

[0010] Further, the control signal conversion device according to the present invention comprises:
A control signal converter for converting a control signal for an analog AV signal into a control signal corresponding to a bus capable of transmitting a mixture of an information signal and a control signal, wherein the reproducing device is output from an analog AV signal editing machine A control signal input terminal, a recorder control signal input terminal output from an analog AV signal editing machine, a digital player connection terminal for connecting a digital player corresponding to the bus, and a bus corresponding to the bus. A digital recorder connection terminal for connecting the digital recorder, and a digital player connection terminal which converts the input player control signal and recorder control signal into a player control signal and a recorder control signal corresponding to the bus, and Means for outputting from a digital recorder connection terminal.

According to the present invention, in a system in which a plurality of digital AV devices are connected by a bus capable of transmitting an information signal and a control signal, an output information signal of a reproducing device is transmitted to the recorder via the bus for editing and recording. At this time, the output control signal of the editing machine for the analog AV signal is converted into a control signal corresponding to the bus by a control signal conversion device, and given to the playback device and the recording device on the bus, whereby the analog AV signal The editing control of the digital AV equipment on the bus can be performed by using an editing machine.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing an example of an editing system to which the present invention is applied. In this editing system, a playback device and a recorder use devices compatible with the 1394 bus, and the editor uses devices compatible with LANC. Then, by connecting via a conversion selector between devices corresponding to different bus systems, digital editing can be performed using an existing LANC compatible editor.

As shown in FIG. 1, in this editing system, a first reproducing device 1, a second reproducing device 2, and a third reproducing device 3
1394 bus cable 8,
9 and 10 are connected. These playback devices are the aforementioned DVTR, DCAM, DTV, digital tuner, or the like. Further, in this editing system, the distance between the first recorder 4 and the second recorder 5 and the conversion selector 6 is one.
They are connected by cables 11 and 12 of a 394 bus. These recorders are DVTRs and the like. Further, in this editing system, LANC is connected between the editing machine 7 and the conversion selector 6.
They are connected by cables 13 and 14.

In FIG. 1, physical addresses # 0 to # 2 are assigned to first to third reproducing devices 1 to 3 which are devices connected by a 1394 bus, 5 are assigned physical addresses # 3 and # 4, and the conversion selector 6 is assigned physical address # 5. This physical address is automatically assigned to each device according to the connection form of the device when a bus reset occurs when the device is connected via a 1394 bus cable.

The conversion selector 6 has a reproducing machine changeover switch 1
5 and a recorder switch 16 are provided. There are four buttons of the replay switch,
Four players can be selected. However, four playback devices can be connected to the conversion selector 6,
In FIG. 1, three units are connected, and one of the three units is selected by pressing, or. Similarly, the recorder switch also has four buttons of,, and, so that four players can be selected. Here, pressing or selects one of the two recorders. I do. Here, the conversion selector 6 can connect up to four players and recorders each, but it is possible to configure a conversion selector that can connect up to 62 players and recorders in total.

Of the LANC cables 13 and 14 connected between the editing machine 7 and the conversion selector 6, the LANC cable 13 is a LANC control signal for controlling the playback device selected by the playback device changeover switch 15. The LANC cable 14 is used for transmission, and is used for transmitting a LANC control signal for controlling the recorder selected by the recorder switch 16.

The inside of the conversion selector 6 is configured as shown in FIG. In this figure, the same parts as in FIG. 1 are denoted by the same reference numerals as in FIG. As shown in this figure,
The conversion selector 6 has eight terminals P1 to P8 to which a 1394 bus cable can be connected, and two terminals P9 and P10 to which a LANC cable can be connected. Terminal P
Reference numerals 1, P2, P3, and P4 correspond one-to-one with the buttons of the playback device changeover switch. That is, when the button is pressed, the player connected to the terminal P1 is controlled. The same applies to the buttons and. Terminals P5, P6, P7, and P8 correspond one-to-one with the buttons of the recorder switch.

Inside the conversion selector 6, a physical layer control block (hereinafter referred to as PHY) 2 of the 1394 bus is provided.
1; a link layer control block (hereinafter referred to as LINK) 22 connected to the PHY 21; a command conversion block 23 connected to the LINK 22;
Selector 24 and recorder selector 2 connected to
5 are provided.

The PHY 21 performs initialization of the 1394 bus, arbitration of usage rights, and the like. In addition, Asy
The communication of the nc packet is performed, and the packet is transmitted / received to / from the cable of the 1394 bus through the terminals P1 to P8. Further, an Iso packet is transmitted and received to and from the cable of the 1394 bus.

The LINK 22 sets the Async packet to 1
When output to the 394 bus cable, control signals such as commands and responses are packetized and sent to the PHY 21. When an Async packet is input from the 1394 bus cable, the Async received from the PHY 21 is output.
Disassemble the packet and extract commands and responses.

The command conversion block 23 includes a LINK2
2 and a command and a response in accordance with the IEEE 1394 standard.
14 communicates commands and status signals conforming to the LANC standard.

The reproducing device selector 24 converts the data corresponding to the button number selected by the reproducing device changeover switch 15 into LI.
Give to NK22. The recorder selector 25 gives the LINK 22 data corresponding to the button number selected by the recorder switch 16.

Next, the operation of the editing system configured as described above will be described. Here, the operation when the output signal of the first reproducing device 1 is recorded on the second recording device 5 will be described. First, from the state shown in FIG. 1, the user presses the buttons of the playback device changeover switch 15 and the recorder changeover switch 16. By this operation, the first reproducing device 1 and the second recording device 5 are selected. Next, the user executes an operation for controlling the first reproducing device 1 and the second recording device 5 by the editing device 7.

LANC for controlling the first player 1
The command is sent to the conversion selector 6 through the LANC cable 13. Then, in the command conversion block 23, the LANC command is converted into a 1394 bus command and sent to the LINK 22. The LINK 22 sends this command to the PHY 21 as an Async packet. At this time, since the data corresponding to the button is input from the reproducing device selector 24, the physical address # 0 of the first reproducing device 1 connected to the terminal P1 is added to the destination address of the header of the Async packet. This As
The sync packet consists of PHY21 and terminals P1, P2, P3.
Cables 8, 9, 10, 11, 12 through P5, P6
Sent to Since the first player 1 has its own destination address in the header of the Async packet, the first player 1 fetches the Async packet and follows the command.
The other device does not take in the Async packet because it does not have an address addressed to itself. Similarly, after the LANC command for controlling the second recorder 5 is converted into a 1394 bus command, the LANC command is taken into the second recorder 5 and used for the control.

[0025]

As described above in detail, according to the present invention, editing control of digital AV signals can be performed using an existing analog AV signal editing machine. It is also possible to switch between a plurality of playback devices and recorders for editing.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an editing system to which the present invention is applied.

FIG. 2 is a diagram showing an internal configuration of a conversion selector in FIG. 1;

FIG. 3 is a diagram illustrating an example of a system in which a plurality of digital devices are connected by a 1394 bus and communication is performed between the digital devices.

FIG. 4 is a diagram illustrating an example of a form of signal transmission in a system in which a plurality of digital devices are connected by a 1394 bus and communication is performed between the digital devices.

[Explanation of symbols]

1-3: Reproducing machine, 4, 5: Recording machine, 8-12: 1394
Bus cable, 13, 14 ... LANC cable, 15
... Reproducer switch, 16 ... Recorder switch

Claims (5)

[Claims] In a system in which a plurality of digital AV devices are connected by a bus capable of transmitting information signals and control signals in a mixed manner, an output information signal of a reproducing device is transmitted to the recorder via the bus for editing and recording. An editing machine for analog AV signals and a control signal conversion device for converting an output control signal of the editing machine into a control signal corresponding to the bus, wherein an output control signal of the editing machine is converted by the control signal conversion device. An editing control method, wherein editing control is performed by converting the control signal into a control signal corresponding to the bus and supplying the control signal to the playback device and the recording device. 2. The editing control method according to claim 1, wherein said bus is an IEEE 1394 serial bus, and said editing machine is compatible with LANC. 3. A control signal converter for converting a control signal for an analog AV signal into a control signal corresponding to a bus capable of transmitting a mixture of an information signal and a control signal. An input terminal for a playback device control signal to be output, an input terminal for a recorder control signal output from the analog AV signal editing machine, and a digital playback device connection terminal for connecting a digital playback device corresponding to the bus. A digital recorder connection terminal for connecting a digital recorder corresponding to the bus; and converting the inputted player control signal and recorder control signal into a player control signal and a recorder control signal corresponding to the bus. Means for outputting the signals from the digital playback device connection terminal and the digital recording device connection terminal. 4. A plurality of digital playback device connection terminals and a plurality of digital recording device connection terminals, and a plurality of digital playback devices connected to the plurality of digital playback device connection terminals and the digital recording device connection terminal, respectively. 4. The control signal converter according to claim 3, further comprising means for selecting one of the digital recording devices. 5. The control signal conversion device according to claim 3, wherein said bus is an IEEE 1394 serial bus, and said editor is compatible with LANC.