CN103517088A - A method, an apparatus and a terminal used for transmitting video data - Google Patents
A method, an apparatus and a terminal used for transmitting video data Download PDFInfo
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- CN103517088A CN103517088A CN201210201292.6A CN201210201292A CN103517088A CN 103517088 A CN103517088 A CN 103517088A CN 201210201292 A CN201210201292 A CN 201210201292A CN 103517088 A CN103517088 A CN 103517088A
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Abstract
The invention relates to the technical field of communication, and especially relates to a method, an apparatus and a terminal used for transmitting video data. The method comprises the following steps: a corresponding present working mode is determined according to the type of a transmission protocol of present serial video data; in the present working mode, the present serial video data is converted to parallel video data, and the parallel video data is decoded to a data flow with a video frame format; and after the data flow with the video frame format is decomposed to be video frames, the video frames are sent to a digital signal processor. Through the utilization of the method, the apparatus and the terminal used for transmitting the video data, and through setting a corresponding working mode for each transmission protocol, and through the detection of the type of the transmission protocol of the received video data, the adopted working mode is determined, so that subsequent operations such as decoding carried out aiming at the type of the transmission protocol can be conducted. The flexible self-adaptability transmission employs video data with different transmission protocols, so that the transmission efficiency of the video data is raised and the cost is saved.
Description
Technical field
The present invention relates to technical field of communication, relate in particular to a kind of method, device and terminal of transmitting video data.
Background technology
Along with the rhythm in safety monitoring system digitlization ,Gao Qinghua is accelerated, high definition product will be future trend.But networking products exist the problems such as very important delay, encoding and decoding loss and high bandwidth.In order to reach real real-time high definition, can use optical fiber or SDI(Serial Digital Interface, digital serial interface) etc. high speed protocol transmission video, the video reception apparatus of answering in contrast also arises at the historic moment.
At present, video reception apparatus can only receive a kind of fixing high-speed bus agreement, and video reception apparatus is only supported optical fiber interface or only supported SDI interface.Like this, different headend equipments need to be equipped with different video reception apparatus, causes equipment to use underaction.
Summary of the invention
The embodiment of the present invention provides a kind of method, device and terminal of transmitting video data, and adaptivity transmission flexibly adopts the video data of differing transmission protocols, has improved video data transmitting efficiency, has saved cost.
The embodiment of the present invention provides a kind of method of receiving video data, comprising:
According to the transport protocol type of the current serial video data receiving, determine corresponding work at present pattern;
Under work at present pattern, described current serial video data is converted to parallel video data;
By described parallel video data decode, it is the data flow with frame of video form;
The described data flow with frame of video form is decomposed into after frame of video, sends to digital signal processor.
Accordingly, the embodiment of the present invention provides a kind of device of transmitting video data, comprising:
Mode decision module, for according to the transport protocol type of the current serial video data receiving, determines corresponding work at present pattern;
Modular converter, under work at present pattern, is converted to parallel video data by described current serial video data;
Decoder module, for being the data flow with frame of video form by described parallel video data decode;
Processing module, for the described data flow with frame of video form is decomposed into after frame of video, sends to digital signal processor.
Accordingly, the embodiment of the present invention provides a kind of terminal, comprising: the device of above-mentioned transmitting video data.
The embodiment of the present invention provides a kind of method, device and terminal of transmitting video data, for according to the transport protocol type of the current serial video data receiving, determines corresponding work at present pattern; Under work at present pattern, described current serial video data is converted to parallel video data; By described parallel video data decode, it is the data flow with frame of video form; The described data flow with frame of video form is decomposed into after frame of video, sends to digital signal processor.Method, device and the terminal of the transmitting video data that the use embodiment of the present invention provides, by setting corresponding mode of operation for every kind of host-host protocol, the transport protocol type of the video data receiving by detection, determine the mode of operation of employing, and then for this transport protocol type, carry out the operations such as subsequent decoding, adaptivity transmission flexibly adopts the video data of differing transmission protocols, has improved video data transmitting efficiency, has saved cost.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of transmitting video data in the embodiment of the present invention;
Fig. 2 is the method flow schematic diagram of transmitting video data in another embodiment of the present invention;
Fig. 3 is the device schematic diagram of transmitting video data in the embodiment of the present invention.
Embodiment
Below in conjunction with each accompanying drawing, embodiment of the present invention technical scheme main realized to principle, embodiment and the beneficial effect that should be able to reach is at length set forth.
The problem existing in order to solve prior art, the embodiment of the present invention provides a kind of method of transmitting video data, and as shown in Figure 1, the method comprises:
Step 101, according to the transport protocol type of the current serial video data receiving, determine corresponding work at present pattern;
Step 102, under work at present pattern, current serial video data is converted to parallel video data;
Step 103, by parallel video data decode, be the data flow with frame of video form;
Step 104, the data flow with frame of video form is decomposed into after frame of video, sends to digital signal processor.
The shortcoming existing for prior art, the method that the embodiment of the present invention provides, to adopting the serial video data of different transport protocol type transmission, adopts different transmission methods.First by different transport protocol types, corresponding different mode of operations, the serial video data for example transmitting by optical fiber high speed protocol adopts the first mode of operation to process; The serial video data transmitting by SDI high speed protocol adopts the second mode of operation to process.Certainly, more than two of the type of host-host protocol, can be for a plurality of.The processing mode of wherein, under each mode of operation, the serial video data receiving being carried out is corresponding to corresponding transport protocol type.
While receiving serial video data, which kind of mode of operation first judgement should be used process this serial video data, and namely this serial video data by which kind of host-host protocol transmits.Because the host-host protocol adopting is when consistent, just can receive this serial video data, so can adopt the mode of poll to determine, use which kind of mode of operation, for example, when thering is two kinds of host-host protocols, the time that can use the first mode of operation not receive serial video data is while surpassing the scheduled time, using the second mode of operation as work at present pattern; Use work at present pattern to receive serial video data; Wherein, the first mode of operation transport protocol type corresponding with the second mode of operation is different.In like manner, when thering is two or more host-host protocols, also can adopt successively different mode of operations to remove to receive serial video data, until have under a mode of operation, can receive serial video data.
Determine after the transport protocol type of serial video data employing, lock the work at present pattern corresponding with this transport protocol type, under work at present pattern, current serial video data is converted to parallel video data.Then, according to work at present pattern, determine the decoding parts of decode video data; Adopt after these decoding parts decoding parallel video data, adopt transport protocol type corresponding to work at present pattern to encapsulate decoded video data, form the data flow with frame of video form.Concrete, the corresponding decoding parts of each mode of operation, have determined after mode of operation like this, also determine the decoding parts for the parallel video data of decoding.With the serial video data transmitting by optical fiber high speed protocol, adopt the first mode of operation to process, the serial video data transmitting by SDI high speed protocol adopts the second mode of operation to be treated to example, there is corresponding the first mode of operation of the first decoding parts, corresponding the second mode of operation of the second decoding parts.When determining that employing the second mode of operation is processed parallel video data, just can determine and adopt the second decoding parts to process parallel video data.
Wherein, during decoding parallel video data, parallel video data are carried out to the word boundary of descrambling, recovery, video data and original frame of video form.Descrambling, recovery word boundary do not have fixing sequencing, according to actual conditions, determine, concrete, for SDI host-host protocol: during decoding parts decoding parallel video data, can be first according to the scrambler multinomial descrambling of smpte274, by the data stream recovery word boundary after descrambling, finally recover its original frame of video form again.For Optical Fiber Transmission agreement: during decoding parts decoding parallel video data, the operation of can first recover word boundary, decoding and recovering original frame of video form again.For recovering word boundary, recovering its original process such as frame of video form, be the ordinary skill in the art, detailed process does not repeat them here.It should be noted that, when decoding parts are processed parallel video data, the sequencing of descrambling, recovery word boundary can determine according to actual conditions there is no fixing sequencing.
After decoding parts decoding parallel video data, adopt transport protocol type corresponding to work at present pattern to encapsulate decoded video data, form the data flow with frame of video form.Concrete, according to frame of video form, in a byte of every frame data, add valid data and start sign, at the trail byte of every frame data, add effective ED sign, form frame of video; According to transport protocol type, determine the bit wide of frame of video; Frame of video is sent to digital signal processor according to this bit wide.After formation has the data flow of frame of video form, can also obtain the characterisitic parameter of the data flow with frame of video form; Characterisitic parameter is sent to digital signal processor in i2c mode.For example, adopt digital video circuit interface standard BT656 or BT1120, in a byte of every frame data, add SAV(Start Active Video, valid data start sign), trail byte at every frame data adds EAV(End Active Video, valid data finish sign), and then clearly go out each frame of video.The frequency that each host-host protocol is corresponding, form and bit wide are likely identical, also likely different, after forming frame of video, need to determine the bit wide that meets host-host protocol, and frame of video is sent to digital signal processor according to this bit wide.For example the transmission frequency of SDI host-host protocol is 148.5MHz, and form is BT656 or BT1120, and bit wide is 8bit; The transmission frequency of Optical Fiber Transmission agreement is 123.75MHz, and form is BT656 or BT1120, and bit wide is 8bit.
In data flow, there are a large amount of invalid data bit, cause relevant device to be defined as breaking down, while forming frame of video, can add the data that characterize blank screen or color screen in the invalid data bit of data flow.
Pass through foregoing description, can find out, the method of the transmitting video data that the use embodiment of the present invention provides, by setting corresponding mode of operation for every kind of host-host protocol, the transport protocol type of the video data receiving by detection, determines the mode of operation of employing, and then for this transport protocol type, carry out the operations such as subsequent decoding, adaptivity transmission flexibly adopts the video data of differing transmission protocols, has improved video data transmitting efficiency, has saved cost.
The method embodiment of the present invention being provided below by specific embodiment is elaborated.Suppose that method provided by the invention completes based on FPGA platform, for receiving the HD video data of SDI mouth or light port transmission, and be sent to digital signal processor according to BT656 form or BT1120 form.The data of input are: SDI mouth: 1.485G, serial data; Light mouth: 1.2375G, serial data.The data of exporting by this method are: SDI mouth: 148.5MHz, and form is BT656 or BT1120, bit wide is 8bit; Light mouth: 123.75MHz, form is BT656 or BT1120, bit wide is 8bit.Corresponding the first mode of operation of SDI host-host protocol, corresponding the second mode of operation of Optical Fiber Transmission agreement, this process as shown in Figure 2, comprises the following steps:
The first mode of operation of step 201, employing acquiescence, as work at present pattern, receives serial video data;
Whether step 202, detection receive serial video data, if receive, perform step 204; Otherwise, perform step 203;
Wherein, step 207 and step 208 do not have fixing sequencing on carrying out, and can carry out respectively, can carry out simultaneously yet.
It should be noted that, the method that the embodiment of the present invention provides can also be applicable to the platforms such as DSP, ARM.Identical owing to realizing principle, repeat no more at other platforms and realize process of the present invention.
Pass through foregoing description, can find out, the method of the transmitting video data that the use embodiment of the present invention provides, by setting corresponding mode of operation for every kind of host-host protocol, the transport protocol type of the video data receiving by detection, determines the mode of operation of employing, and then for this transport protocol type, carry out the operations such as subsequent decoding, adaptivity transmission flexibly adopts the video data of differing transmission protocols, has improved video data transmitting efficiency, has saved cost.
Based on same inventive concept, the embodiment of the present invention also provides a kind of device of transmitting video data, as shown in Figure 3, comprising:
Preferably, described mode decision module 301, while surpassing the scheduled time specifically for the time of using the first mode of operation not receive serial video data, using the second mode of operation as work at present pattern; Use work at present pattern to receive serial video data; Wherein, described the first mode of operation transport protocol type corresponding with described the second mode of operation is different.
Preferably, described decoder module 303, specifically for according to work at present pattern, determines the decoding parts of decode video data; Adopt after described decoding parts decoding parallel video data, adopt transport protocol type corresponding to described work at present pattern to encapsulate decoded video data, form the data flow with frame of video form.
Preferably, during described decoder module 303 decoding parallel video data, described parallel video data are carried out to descrambling, the word boundary of recovering video data and original frame of video form.
Preferably, this device also comprises:
Preferably, described processing module 304, specifically for according to described frame of video form, adds valid data in a byte of every frame data and starts sign, at the trail byte of every frame data, adds effective ED sign, forms frame of video; According to described transport protocol type, determine the bit wide of described frame of video; Described frame of video is sent to digital signal processor according to described bit wide.
Preferably, this device also comprises: add module 306, while forming frame of video for described processing module 304, in the data bit that data flow is invalid, add the data that characterize blank screen or color screen.
Based on same inventive concept, the embodiment of the present invention provides a kind of terminal, comprising: the device of above-mentioned transmitting video data.
Pass through foregoing description, can find out, method, device and the terminal of the transmitting video data that the use embodiment of the present invention provides, by setting corresponding mode of operation for every kind of host-host protocol, the transport protocol type of the video data receiving by detection, determines the mode of operation of employing, and then for this transport protocol type, carry out the operations such as subsequent decoding, adaptivity transmission flexibly adopts the video data of differing transmission protocols, has improved video data transmitting efficiency, has saved cost.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (15)
1. a method for transmitting video data, is characterized in that, comprising:
According to the transport protocol type of the current serial video data receiving, determine corresponding work at present pattern;
Under work at present pattern, described current serial video data is converted to parallel video data;
By described parallel video data decode, it is the data flow with frame of video form;
The described data flow with frame of video form is decomposed into after frame of video, sends to digital signal processor.
2. the method for claim 1, is characterized in that, describedly according to the transport protocol type of the current serial video data receiving, determines corresponding work at present pattern, comprising:
The time of using the first mode of operation not receive serial video data is while surpassing the scheduled time, using the second mode of operation as work at present pattern;
Use work at present pattern to receive serial video data;
Wherein, described the first mode of operation transport protocol type corresponding with described the second mode of operation is different.
3. the method for claim 1, is characterized in that, by described parallel video data decode, is the data flow with frame of video form, comprising:
According to work at present pattern, determine the decoding parts of decode video data;
Adopt after described decoding parts decoding parallel video data, adopt transport protocol type corresponding to described work at present pattern to encapsulate decoded video data, form the data flow with frame of video form.
4. method as claimed in claim 4, is characterized in that, during decoding parallel video data, described parallel video data is carried out to descrambling, the word boundary of recovering video data and original frame of video form.
5. method as claimed in claim 4, is characterized in that, described formation also comprises after having the data flow of frame of video form:
The characterisitic parameter described in obtaining with the data flow of frame of video form;
Described characterisitic parameter is sent to digital signal processor in i2c mode.
6. the method for claim 1, is characterized in that, the described data flow with frame of video form is decomposed into after frame of video, sends to digital signal processor, comprising:
According to described frame of video form, in the byte of every frame data, add valid data and start sign, at the trail byte of every frame data, add effective ED sign, form frame of video;
According to described transport protocol type, determine the bit wide of described frame of video;
Described frame of video is sent to digital signal processor according to described bit wide.
7. method as claimed in claim 6, is characterized in that, while forming frame of video, in the data bit that data flow is invalid, adds the data that characterize blank screen or color screen.
8. a device for transmitting video data, is characterized in that, comprising:
Mode decision module, for according to the transport protocol type of the current serial video data receiving, determines corresponding work at present pattern;
Modular converter, under work at present pattern, is converted to parallel video data by described current serial video data;
Decoder module, for being the data flow with frame of video form by described parallel video data decode;
Processing module, for the described data flow with frame of video form is decomposed into after frame of video, sends to digital signal processor.
9. device as claimed in claim 8, is characterized in that, described mode decision module, while surpassing the scheduled time specifically for the time of using the first mode of operation not receive serial video data, using the second mode of operation as work at present pattern; Use work at present pattern to receive serial video data; Wherein, described the first mode of operation transport protocol type corresponding with described the second mode of operation is different.
10. device as claimed in claim 8, is characterized in that, described decoder module, specifically for according to work at present pattern, is determined the decoding parts of decode video data;
Adopt after described decoding parts decoding parallel video data, adopt transport protocol type corresponding to described work at present pattern to encapsulate decoded video data, form the data flow with frame of video form.
11. devices as claimed in claim 10, is characterized in that, during described decoder module decoding parallel video data, described parallel video data are carried out to descrambling, the word boundary of recovering video data and original frame of video form.
12. devices as claimed in claim 10, is characterized in that, also comprise:
Characterisitic parameter module, for having the characterisitic parameter of the data flow of frame of video form described in obtaining; Described characterisitic parameter is sent to digital signal processor in i2c mode.
13. devices as claimed in claim 8, it is characterized in that, described processing module, specifically for according to described frame of video form, in the byte of every frame data, add valid data and start sign, at the trail byte of every frame data, add effective ED sign, form frame of video; According to described transport protocol type, determine the bit wide of described frame of video; Described frame of video is sent to digital signal processor according to described bit wide.
14. devices as claimed in claim 13, is characterized in that, also comprise:
Add module, while forming frame of video for described processing module, in the data bit that data flow is invalid, add the data that characterize blank screen or color screen.
15. 1 kinds of terminals, is characterized in that, comprising: as the device of the transmitting video data as described in arbitrary in claim 8-14.
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