CN102685396A

CN102685396A - Method and system for serial communication of controlled equipment in nonlinear edition system

Info

Publication number: CN102685396A
Application number: CN2011100668669A
Authority: CN
Inventors: 夏永宏; 王兴兵; 何宇飞
Original assignee: China Digital Video Beijing Ltd
Current assignee: China Digital Video Beijing Ltd
Priority date: 2011-03-18
Filing date: 2011-03-18
Publication date: 2012-09-19
Anticipated expiration: 2031-03-18
Also published as: CN102685396B

Abstract

The invention discloses a method and a system for the serial communication of controlled equipment in a nonlinear edition system, and is mainly used for the nonlinear edition system and related fields of digital media edition. The method and the system are used for solving the problem that the nonlinear edition system only can perform one-way communication with an external host through a standard serial interface protocol. In order to solve the problem, two-way information exchange between a nonlinear edition system host and the external control equipment is realized by adopting the technical means of establishing full duplex communication in interface conversion and interface control ways, and in the interface conversion part, independent control loops are provided for a two-way data communication (transmission and reception) way, and the conventional common ground wire linking way is not adopted, so that interference between two-way data in a signal exchange process is effectively avoided, and effective and efficient communication is effectively ensured when the communication of a great amount of data is required and the system is kept in a working state for a long time; and moreover, in the using process of the method or the system, a standard interface is adopted, and is universal and replaceable, so that the functions of the conventional nonlinear edition system and master control equipment can be effectively expanded.

Description

The method and system of the serial communication of controlled plant in a kind of nonlinear editing system

Technical field

The present invention relates to a kind of nonlinear editing system and abbreviate non-volume systems technology field as, the method and system of serial communication in particularly a kind of non-linear editing controlled system.

Background technology

Non-volume system is the most frequently used a kind of video editing operating system in the fields such as present video display post-production, Video processing, radio and television; Be to carry out the A/D conversion to the various video/audio signals of input; Adopt digital compression technology that information is deposited in the hard disc of computer; Always in computer, carry out arbitrary access arbitrarily, processing and modification; Thereby utilize a computer just to accomplish the work that a lot of equipment such as video tape recorder, effect machine, film titler, sound console are done in the traditional tv program post-production system, the emphasis of its work carries out digitized processing after being exactly the video/audio signal process digitlization with simulation; In order to accomplish above work; Common non-volume system comprises: groundwork unit such as main frame, image processing equipment, digital storage equipment, display device, analog input/output equipment, and wherein analog input/output equipment is meant that mainly storage, broadcast, record analog look the equipment of audio frequency, like image capture devices such as video tape recorder, video camera, recorders; Equipment, realization data acquisition and broadcasts such as the control video recording of wherein non-volume system, shooting; Because consider the communications protocol unified with primary processor, therefore adopt the serial port communicating protocol (RS232 communications protocol) that meets the industry communication standard to carry out alternately usually, the peripheral processing unit based on same communications protocol (RS422 communications protocol) also is common simultaneously.For example VTR (Video Tape Recorder video tape recorder), protools (a kind of workstation software system that is used to look Audio Processing), pyramix (broadcast level audio workstation) etc. follow this communication protocol.Just be based on this standard, non-volume system could accomplish control and communication function between different ancillary equipment.At present; Non-volume is comparatively common and also be widely used in the broadcasting and TV video field through the mode of serial port protocol control VTR type equipment, but because the characteristics of equipment itself, present communication modes generally is unidirectional; Mainly be to edit and release out instruction peripheral hardware is control effectively by non-; That needing to carry out uploads and download work, when initiatively passing ancillary equipment information back main frame according to actual needs, in the time of also can accomplishing some simple operationss, still; Existing serial communication mode will be difficult to satisfy this requirement; Therefore need to design the full duplex communication pattern, realize that the serial ports of RS232 communications protocol and RS422 communications protocol switches, realize the real time information exchange and the collection of main frame and ancillary equipment.

Summary of the invention

In order to reach the purpose that non-volume system effectively controls serial peripheral equipment; The present invention provides the method for the serial communication of controlled plant in a kind of nonlinear editing system; The method comprises: at first, the command information in the main frame nonlinear editing system is sent in the Communications service module; Open serial communication; Carry out the exchanges data of main frame and peripheral communication apparatus; After confirming that end is carried out in used instruction; Close serial communication; Wherein can adopt RS232 communications protocol interface at non-volume system host output; After serial communication is set up, can accomplish control information exchange, two types of data exchange operation of data information exchange, wherein, data information exchange also comprises: main frame sends data information exchange, peripheral data information exchange; The control information exchange also comprises: host command issues control information, ancillary equipment State Control information, ancillary equipment response control information, and wherein, ancillary equipment can be the RS422 protocol devices.

The system of the serial communication of controlled plant in a kind of nonlinear editing system also is provided simultaneously; By have the RS232 serial port protocol and can move non-volume system main frame, serial converter, meet RS422 serial port protocol equipment three parts and form; Wherein, Above-mentioned serial converter is: the RS232 serial port protocol converts the RS422 serial port protocol into; In the serial ports conversion, use RXD reception data-interface among the RS232, TXD transmission data-interface, RTS request transmission interface, CTS clear to send interface to accomplish interface conversion and connect, the said RS422 of meeting serial port protocol equipment can be: vtr video recording equipment, protools station device, pyramix station device.

Also provide the device of the serial communication of controlled plant in a kind of nonlinear editing system to comprise simultaneously: serial line interface Communications service module, serial ports modular converter; Also can comprise: the serial ports control module.

Compared with prior art, the embodiment of the invention has the following advantages:

The method that provides through the embodiment of the invention; Through between non-volume system host and controlled ancillary equipment, setting up serial communication mechanism; Two kinds of serial line interface forms of two kinds of equipment are changed each other, and on the read-write duplex channel, set up the full duplex mode of operation, can accomplish control data, information data exchange; And independently ground wire is provided respectively, a rather than public ground wire for sending loop and receiving loop.Effectively improve to have reduced between line and disturb, improved antijamming capability, thereby improved the transmission speed of data, and enlarged transmission range surrounding environment.

Description of drawings

Fig. 1 is the method sketch map in the embodiment of the invention one;

Fig. 2 is RS232 and a RS422 interface conversion sketch map in the embodiment of the invention one;

Fig. 3 is that the work system in the embodiment of the invention two is formed sketch map;

Fig. 4 is the sketch map that the device in the embodiment of the invention three is formed.

Embodiment

Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention is done further to describe in detail:

Embodiment one:

The method of the serial communication of controlled plant in this flow process of the present invention a kind of nonlinear editing system as shown in Figure 1 may further comprise the steps:

At first; Send communication instruction the main process equipment of RS232 serial line interface to " Communications service module " from loading non-line editing system and having; This module can be carried out the conversion of RS232 serial line interface and RS422 serial line interface, and connected mode is as shown in Figure 2: wherein said serial converter uses among the RS232 RXD to receive to receive among data-interface and the RS422 that ground wire links to each other, TXD send read among data-interface and the RS422 anodally link to each other, the reception positive pole links to each other, reads ground wire among CTS clear to send interface and the RS422 and link to each other among RTS request transmission interface and the RS422; For sending loop and receiving loop independently ground wire is provided respectively through above structure, rather than a public ground wire, the phase mutual interference between the data effectively avoided; Judge afterwards whether the communication serial ports is opened,,, then carry out opening operation, apparatus for establishing communication afterwards earlier if serial ports is not opened if opened then apparatus for establishing communication; After accomplishing above work, can begin the communication between main frame and the peripheral communication apparatus, wherein can transmit two kinds of data: control information exchange, data information exchange; Wherein the control information exchange mainly comprises: host command issues control information, ancillary equipment State Control information, ancillary equipment response control information; Data information exchange also comprises: main frame sends data information exchange, peripheral data information exchange; As long as receiving equipment can satisfy and be vtr video recording equipment, protools station device pyramix station device; And have the RS422 interface protocol, all can carry out bi-directional data transmission, after confirming that all operations finishes; Close serial line interface, finish whole communication process afterwards.

Compared with prior art; It is interconnected that the present invention has the both-way communication that can effectively solve between the non-volume main frame with RS232 serial line interface and the vtr video recording equipment with RS422 serial line interface, protools station device, the pyramix station device; And can effectively prevent influencing each other of information; Accomplished the active data isolation; Thereby guaranteed the transmission quality of data, and implemented also very easyly, be specially adapted to need big data, long-time, the occasion that needs dynamic process;

Embodiment two:

The system of the serial communication of controlled plant in this flow process of the present invention a kind of nonlinear editing system as shown in Figure 3 mainly comprises: have the RS232 serial port protocol and can move the main frame of non-volume system; Serial converter; Meet RS422 serial port protocol equipment; Wherein said serial converter is mainly accomplished RS232 agreement serial ports and is converted RS422 agreement serial ports into; And set up serial communication, concrete linking relationship is as shown in Figure 2, in embodiment one, this Partial Feature is described; Here no longer repeat, the requirement of treating communication ancillary equipment is vtr video recording equipment, protools station device, the pyramix station device that meets the RS422 serial port protocol.Because have interface switching device in this system; It also is very easy expanding for the hardware capability of general non-volume main frame; Should be pointed out that in carrying out the interface conversion link process those skilled in the art can not expect accomplishing through " gate leve " design the switching of various controlled potential signals; And also can increase comparing function; The effectively generation of " by force " situation of control twocouese data, therefore above improvement should be within protection scope of the present invention, and belonging to does not need creative work with regard to obtainable technical scheme.

Embodiment three:

The device of the serial communication of controlled plant in this flow process of the present invention a kind of nonlinear editing system as shown in Figure 4:

Basic composition comprises: serial line interface Communications service module, serial ports modular converter;

In order to realize control, further can also increase the serial ports control module to serial ports;

Description institute control equipment as among the embodiment one, two is vtr video recording equipment, protools station device, pyramix station device.

Above equipment is the basic composition device of indication main frame and ancillary equipment among completion the present invention.

Should be understood that; To those skilled in the art; Improve function in order further to accomplish; Can increase parallel number of peripheral devices, host number on the basis of this device or behind the reload signal amplifying device, carry out many equipment and promote, the technique effect of its realization be should belong to protection scope of the present invention because of the open scheme control of the present invention.

Claims

1. the method for the serial communication of controlled plant in the nonlinear editing system is characterized in that, comprising:

Command information in the main frame nonlinear editing system is sent in the Communications service module;

Open serial communication;

Carry out the exchanges data of main frame and peripheral communication apparatus;

Close serial communication.

2. the method described in claim 1: it is characterized in that: also comprise RS422 communications protocol device coding agreement in the said Communications service module;

3. the method described in claim 1 or 2: it is characterized in that: the said serial communication of opening can be RS232 communications protocol equipment:

4. the method described in claim 1: it is characterized in that: said exchanges data of carrying out main frame and peripheral communication apparatus also comprises: control information exchange, data information exchange.

5. the method described in claim 4: it is characterized in that: said control information exchange also comprises: host command issues control information, ancillary equipment State Control information, ancillary equipment response control information.

6. the method described in claim 5: it is characterized in that: said data information exchange also comprises: main frame sends data information exchange, peripheral data information exchange.

7. the method described in claim 1 or 2: it is characterized in that: the said serial communication of closing can be RS232 communications protocol equipment.

8. the system of the serial communication of controlled plant in the nonlinear editing system is characterized in that, comprising:

Have the RS232 serial port protocol and can move the main frame of non-volume system;

Serial converter;

Meet RS422 serial port protocol equipment.

9. the system described in claim 8 is characterized in that, said serial converter is: RS232 agreement serial ports converts RS422 agreement serial ports into.

10. the system described in claim 8; It is characterized in that, said serial converter uses among the RS232 RXD to receive to receive among data-interface and the RS422 that ground wire links to each other, TXD send read among data-interface and the RS422 anodally link to each other, the reception positive pole links to each other, reads ground wire among CTS clear to send interface and the RS422 and link to each other among RTS request transmission interface and the RS422.

11. the system described in claim 8 or 9 or 10 is characterized in that, the said RS422 of meeting serial port protocol equipment can be: vtr video recording equipment, protools station device, pyramix station device.

12. the device of the serial communication of controlled plant is characterized in that in the nonlinear editing system, comprising:

Serial line interface Communications service module;

The serial ports modular converter;

13. device as claimed in claim 12 is characterized in that, can also comprise:

The serial ports control module;

14. like claim 12 or 13 described devices, it is characterized in that, can also comprise: vtr video recording equipment, protools station device, pyramix station device.