CN104065963A - Encoding and decoding system, and resolution fast switching method and device thereof - Google Patents
Encoding and decoding system, and resolution fast switching method and device thereof Download PDFInfo
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Abstract
The invention provides an encoding and decoding system and a resolution fast switching method and device thereof. The method comprises the following steps: when an encoding end is used to detect that the resolution is switched by a signal source, the actual resolution of the current signal source data is read, and a notification is sent to a decoding end, wherein the notification comprises the actual resolution; the actual resolution is judged whether to be the set resolution; if the actual resolution is not the set resolution, then the data of the actual resolution is filled to be the set resolution; and when the notification is received by the decoding end, the data of the effective resolution is extracted according to the actual resolution. The encoding and decoding system and the resolution fast switching method and device thereof of the invention can be used to greatly reduce the switching delay and effectively improve the resolution switching speed.
Description
Technical field
The present invention relates to encoding and decoding technique field, particularly relate to the device and a kind of coding/decoding system that in a kind of switch fast resolution in coding/decoding system method, a kind of coding/decoding system, switch fast resolution.
Background technology
Traditional coding/decoding system, as shown in Figure 1, coding side, to the processing of encoding from signal source RGB (Red, Green, Blue, red, green, blue) data out, obtains H.264 data, then by Internet Transmission to decoding end; Simultaneously decoding end H.264 data decode be RGB data, and the display that outputs to rear end shows.
But in traditional coding/decoding system, in order to realize the encoding and decoding of data, coding side and decoding end inside also need further to comprise multiple submodules.Now, if resolution is switched in front end signal source, the inner each submodule of the coding side relating to below and decoding end needs to switch resolution configuration parameter again, cause the speed of traditional coding/decoding system switching resolution very slow, the longer time of process need cost of whole switching resolution.
Summary of the invention
Based on this, the invention provides a kind of coding/decoding system and switch fast method, the device of resolution, can carry high-resolution switch speed.
For achieving the above object, the present invention adopts following technical scheme:
A method of switching fast resolution in coding/decoding system, comprises the following steps:
When detecting at coding side after signal source switching resolution, read the true resolution of current demand signal source data, and send a notice to decoding end, described notice comprises described true resolution;
Judge whether described true resolution is to set resolution;
If not, by the data stuffing of described true resolution be described setting resolution;
When receiving in decoding end after described notice, extract the data of effective resolution according to described true resolution.
A device that switches fast resolution in coding/decoding system, comprising:
Notification module, for when detecting that at coding side signal source switches after resolution, reads the true resolution of current demand signal source data, and sends a notice to decoding end, and described notice comprises described true resolution;
Judge module, for judging whether described true resolution is to set resolution;
Packing module when being no in the judged result of described judge module, is described setting resolution by the data stuffing of described true resolution;
Extraction module, for when receiving in decoding end after described notice, extracts the data of effective resolution according to described true resolution.
A kind of coding/decoding system, comprises coding side and decoding end;
Described coding side comprises:
Coding FPGA, for receiving the RGB data of signal source, in the time detecting that signal source is switched resolution, read the true resolution of current RGB data, and judge whether described true resolution is to set resolution, if not, by described RGB data stuffing and be converted to the YUV422 data of described setting resolution, described YUV422 data are outputed to data acquisition module, and send the decoding FPGA of a notice to decoding end, described notice comprises described true resolution;
Data acquisition module, for described YUV422 data are converted to YUV420 data, and arrives coding module by described YUV420 transfer of data;
Coding module, for described YUV420 data are encoded, obtains H.264 data, and by Internet Transmission to decoding end;
Described decoding end comprises:
Decoder module, for described in receiving H.264 after data, the processing of decoding, obtains YUV420 data;
Color space conversion module, for described YUV420 data are converted to YUV422 data, and arrives decoding FPGA by described YUV422 transfer of data;
Decoding FPGA, the notice transmitting for receiving YUV422 data that described color space conversion module transmits and described coding FPGA, extract the YUV422 data of effective resolution according to the true resolution in described notice, and be transferred to display after being converted to RGB data.
Can be found out by above scheme, a kind of coding/decoding system of the present invention and switch fast method, the device of resolution, switch after resolution when signal source detected at coding side, read the true resolution of current demand signal source data, and notify decoding end by the information of resolution changing, then be setting resolution data by the data stuffing of true resolution, decoding end can extract the data of effective resolution according to true resolution.Because a kind of coding/decoding system of the present invention and the method, device of switching fast resolution thereof do not need each submodule of coding side and decoding end inside to switch resolution switching when resolution, therefore can greatly reduce handoff delay, effectively improve the switch speed of resolution.
Brief description of the drawings
Fig. 1 is the structural representation of traditional coding/decoding system;
Fig. 2 is the method flow schematic diagram that switches fast resolution in a kind of coding/decoding system in the embodiment of the present invention;
Fig. 3 is the schematic diagram that carries out data stuffing in the embodiment of the present invention;
Fig. 4 is the schematic diagram that carries out data extraction in the embodiment of the present invention;
Fig. 5 is the apparatus structure schematic diagram that switches fast resolution in a kind of coding/decoding system in the embodiment of the present invention;
Fig. 6 is the structural representation of a kind of coding/decoding system in the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Unless context separately has the description of specific distinct, the element in the present invention and assembly, the form that quantity both can be single exists, and form that also can be multiple exists, and the present invention does not limit this.Although the step in the present invention is arranged with label, and be not used in and limit the precedence of step, unless expressly stated the order of step or the execution of certain step need other steps as basis, otherwise the relative order of step is adjustable.
Shown in Figure 2, a kind of quick method of switching resolution in coding/decoding system, comprises the following steps:
Step S101, when detecting at coding side after signal source switching resolution, read the true resolution of current demand signal source data, and send a notice to decoding end, described notice comprises described true resolution.
As a good embodiment, described coding side can send described notice to decoding end by the mode of TCP (Transmission ControlProtocol transmission control protocol).
Step S102, judges that whether described true resolution is to set resolution, if without processing, otherwise enters step S103.
Step S103, if the judged result of step S102 is no, is described setting resolution by the data stuffing of described true resolution.
As a good embodiment, described setting resolution can be set as the maximum of described coding/decoding system and support resolution.For example, certain coding/decoding system is maximum supports that resolution is 1920 × 1080, front end signal source can support 1024 × 768, 1280 × 720, 1920 × 1080 resolution, signal source is input to after coding side, by FPGA (the Field-Programmable Gate Array of coding side, field programmable gate array) process, all resolution is all unified to process according to 1920 × 1080 resolution, if signal source was exactly 1920 × 1080 originally, without processing, if resolution is less than 1920 × 1080, the FPGA of coding side is filled into resolution 1920 × 1080 resolution automatically.
As a good embodiment, the process that is described setting resolution by the data stuffing of described true resolution specifically can comprise:
Step S1031, calculate described true resolution and described setting resolution in the horizontal direction with vertical direction on difference;
Step S1032 fills respectively the inactive pixels of corresponding size according to described difference in the horizontal direction of data and in vertical direction.
Taking the true resolution that reads as 1024 × 768 as example, as shown in Figure 3, can calculate difference in horizontal direction and be 896, difference in vertical direction is 213, therefore can fill 896 and 213 inactive pixels in the horizontal direction with in vertical direction respectively.Further, described inactive pixels can be all 0.
Step S104, when receiving in decoding end after described notice, extracts the data of effective resolution according to described true resolution.
In an embodiment, described coding/decoding system can be the encoding and decoding transmission equipment of DM8168 therein.In the embodiment of the present invention, the coding side of the encoding and decoding transmission equipment of DM8168 can comprise: coding FPGA, data acquisition module, these submodules of coding module, decoding end can comprise: decoder module, color space conversion module, these submodules of decoding FPGA.In the method for traditional switching resolution, in the time that resolution is switched in front end signal source, the inner each submodule of the coding side relating to below and decoding end needs to switch resolution configuration parameter again, the time that the FPGA that can suppose to encode switches resolution is △ t1, the time that data acquisition module switches resolution is △ t2, the time that coding module switches resolution is △ t3, the time that decoder module switches resolution is △ t4, the time that color space conversion module is switched resolution is △ t5, the time that decoding FPGA switches resolution is △ t6, because H.264 coding has I frame and P frame, if switching resolution, decoding end needs to wait for that an I frame decoding could show after switching resolution, suppose that this time of waiting for the process of I frame is △ t7, so switch in the method for resolution in tradition, the time of whole switching resolution is probably:
△T≈△t1+△t2+△t3+△t4+△t5+△t6+△t7。
In fact, because the processing speed of coding FPGA and decoding FPGA is very fast, the time of switching resolution is Microsecond grade, thus negligible, thus obtain:
△T≈△t2+△t3+△t4+△t5+△t7。
Find through actual test, △ t2 is probably 500ms, and △ t3 is probably 150ms, and △ t4 is probably 600ms, and △ t5 is 150ms, and △ t7 is relevant with the interval of I frame, the interval of 30 frames if, the general 500ms of time delay.So the time delay altogether of the method for employing tradition switching resolution is:
△T≈500+150+600+150+500＝1900ms＝1.9s。
And scheme in the employing embodiment of the present invention, in the time that resolution is switched in front end signal source, can just true resolution be filled to setting resolution (for example 1920 × 1080) in FPGA at coding, coding FPGA output or 1920 × 1080 resolution like this, so data acquisition module below, coding module, decoder module, color space conversion module does not need to switch resolution, because switch for the basic resolution that just do not occur of these submodules, so it is all 0 that these submodules switch the time of resolution, only when decoding FPGA goes to show, just need to extract effective video 1024 × 768 from 1920 × 1080 resolution, then video is exported, as shown in Figure 4.
All very fast because coding FPGA fills data or extracts valid data at decoding FPGA, time delay is substantially negligible, unique time delay is to detect after resolution changing as coding FPGA, need to report an interruption, informed code end upper layer application reads current true resolution, and then notify decoding end by network, and decoding end arranges FPGA by register again, and then decoding end FPGA is according to extraction valid data are set.Because the reporting interruption in the invention process row, network notice and that the process of register is set is all very fast, through actual test probably in 10ms left and right, so the time of whole switching resolution of the present invention be:
△T≈10ms。
Visible, than traditional switching resolution method, the handoff delay of the method for the switching resolution in the embodiment of the present invention is substantially negligible.
Below by a specific embodiment, switching resolution method of the present invention is described:
1, the maximum of first obtaining coding/decoding system is supported resolution, is assumed to be 1920 × 1080, and then whole encoding and decoding transmission equipment normally moves, and namely can normally see image at the display of rear end, and resolution is shown as 1920 × 1080;
2, signal source is switched resolution, and the true resolution of the signal source after switching is 1024 × 768, and the FPGA that encodes this time detects that resolution changes, and to upper layer application reporting interruption, current demand signal source resolution is filled to 1920 × 1080 simultaneously;
3, coding side upper layer application receive interruption, reads current true resolution, then notifies decoding end by this true resolution in the mode of TCP;
4, decoding end receives after notice, and FPGA register is set, and notifies current effective resolution;
5, decoding FPGA extracts effective resolution 1024 × 768 from current 1920 × 1080 resolution, outputs to display below;
6, the resolution that can see display has become 1024 × 768, and the time delay of whole process is substantially negligible.
Corresponding with the method for switching fast resolution in above-mentioned a kind of coding/decoding system, the present invention also provides the device that switches fast resolution in a kind of coding/decoding system, as shown in Figure 5, comprising:
Notification module 101, for when detecting that at coding side signal source switches after resolution, reads the true resolution of current demand signal source data, and sends a notice to decoding end, and described notice comprises described true resolution;
Judge module 102, for judging whether described true resolution is to set resolution;
Packing module 103 when being no in the judged result of described judge module, is described setting resolution by the data stuffing of described true resolution;
Extraction module 104, for when receiving in decoding end after described notice, extracts the data of effective resolution according to described true resolution.
As a good embodiment, described setting resolution can be that the maximum of described coding/decoding system is supported resolution.As a good embodiment, described coding/decoding system can be the encoding and decoding transmission equipment of DM8168.
As a good embodiment, described packing module can comprise:
Difference calculating module, for calculate described true resolution and described setting resolution in the horizontal direction with vertical direction on difference;
Inactive pixels packing module, for filling respectively the inactive pixels of corresponding size in the horizontal direction of data and in vertical direction according to described difference.
In above-mentioned a kind of coding/decoding system, other technical characterictic of the device of switching resolution is identical with the method for switching fast resolution in a kind of coding/decoding system of the present invention fast, and it will not go into details herein.
In addition, the present invention also provides a kind of coding/decoding system, as shown in Figure 6, comprises coding side and decoding end;
Described coding side comprises:
Coding FPGA, for receiving the RGB data of signal source, in the time detecting that signal source is switched resolution, read the true resolution of current RGB data, and judge whether described true resolution is to set resolution, if not, by described RGB data stuffing and be converted to the YUV422 data of described setting resolution, described YUV422 data are outputed to data acquisition module, and send the decoding FPGA of a notice to decoding end, described notice comprises described true resolution;
Data acquisition module, for described YUV422 data are converted to YUV420 data, and arrives coding module by described YUV420 transfer of data;
Coding module, for described YUV420 data are encoded, obtains H.264 data, and by Internet Transmission to decoding end;
Described decoding end comprises:
Decoder module, for described in receiving H.264 after data, the processing of decoding, obtains YUV420 data;
Color space conversion module, for described YUV420 data are converted to YUV422 data, and arrives decoding FPGA by described YUV422 transfer of data;
Decoding FPGA, the notice transmitting for receiving YUV422 data that described color space conversion module transmits and described coding FPGA, extract the YUV422 data of effective resolution according to the true resolution in described notice, and be transferred to display after being converted to RGB data.
Can find out by above scheme, a kind of coding/decoding system of the present invention and switch fast method, the device of resolution, switch after resolution when signal source detected at coding side, read the true resolution of current demand signal source data, and notify decoding end by the information of resolution changing, then be setting resolution data by the data stuffing of true resolution, decoding end can extract the data of effective resolution according to true resolution.Because a kind of coding/decoding system of the present invention and the method, device of switching fast resolution thereof do not need each submodule of coding side and decoding end inside to switch resolution switching when resolution, therefore can greatly reduce handoff delay, effectively improve the switch speed of resolution.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a method of switching fast resolution in coding/decoding system, is characterized in that, comprises the following steps:
When detecting at coding side after signal source switching resolution, read the true resolution of current demand signal source data, and send a notice to decoding end, described notice comprises described true resolution;
Judge whether described true resolution is to set resolution;
If not, by the data stuffing of described true resolution be described setting resolution;
When receiving in decoding end after described notice, extract the data of effective resolution according to described true resolution.
2. the method for switching fast resolution in coding/decoding system according to claim 1, is characterized in that, the maximum that described setting resolution is described coding/decoding system is supported resolution.
3. the method for switching fast resolution in coding/decoding system according to claim 1, is characterized in that the encoding and decoding transmission equipment that described coding/decoding system is DM8168.
4. according to the method for switching fast resolution in the coding/decoding system described in claim 1 or 2 or 3, it is characterized in that, the process that is described setting resolution by the data stuffing of described true resolution comprises:
Calculate described true resolution and described setting resolution in the horizontal direction with vertical direction on difference;
In the horizontal direction of data and in vertical direction, fill respectively the inactive pixels of corresponding size according to described difference.
5. the method for switching fast resolution in coding/decoding system according to claim 4, is characterized in that, sends described notice and comprises to the process of decoding end:
Described coding side sends described notice to decoding end in the mode of TCP.
6. a device that switches fast resolution in coding/decoding system, is characterized in that, comprising:
Notification module, for when detecting that at coding side signal source switches after resolution, reads the true resolution of current demand signal source data, and sends a notice to decoding end, and described notice comprises described true resolution;
Judge module, for judging whether described true resolution is to set resolution;
Packing module when being no in the judged result of described judge module, is described setting resolution by the data stuffing of described true resolution;
Extraction module, for when receiving in decoding end after described notice, extracts the data of effective resolution according to described true resolution.
7. the device that switches fast resolution in coding/decoding system according to claim 6, is characterized in that, the maximum that described setting resolution is described coding/decoding system is supported resolution.
8. the device that switches fast resolution in coding/decoding system according to claim 6, is characterized in that the encoding and decoding transmission equipment that described coding/decoding system is DM8168.
9. according to the device that switches fast resolution in the coding/decoding system described in claim 6 or 7 or 8, it is characterized in that, described packing module comprises:
Difference calculating module, for calculate described true resolution and described setting resolution in the horizontal direction with vertical direction on difference;
Inactive pixels packing module, for filling respectively the inactive pixels of corresponding size in the horizontal direction of data and in vertical direction according to described difference.
10. a coding/decoding system, is characterized in that, comprises coding side and decoding end;
Described coding side comprises:
Coding FPGA, for receiving the RGB data of signal source, in the time detecting that signal source is switched resolution, read the true resolution of current RGB data, and judge whether described true resolution is to set resolution, if not, by described RGB data stuffing and be converted to the YUV422 data of described setting resolution, described YUV422 data are outputed to data acquisition module, and send the decoding FPGA of a notice to decoding end, described notice comprises described true resolution;
Data acquisition module, for described YUV422 data are converted to YUV420 data, and arrives coding module by described YUV420 transfer of data;
Coding module, for described YUV420 data are encoded, obtains H.264 data, and by Internet Transmission to decoding end;
Described decoding end comprises:
Decoder module, for described in receiving H.264 after data, the processing of decoding, obtains YUV420 data;
Color space conversion module, for described YUV420 data are converted to YUV422 data, and arrives decoding FPGA by described YUV422 transfer of data;
Decoding FPGA, the notice transmitting for receiving YUV422 data that described color space conversion module transmits and described coding FPGA, extract the YUV422 data of effective resolution according to the true resolution in described notice, and be transferred to display after being converted to RGB data.
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