CN101170694A - A method for real time monitoring signals of encoding device - Google Patents
A method for real time monitoring signals of encoding device Download PDFInfo
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- CN101170694A CN101170694A CN 200710047239 CN200710047239A CN101170694A CN 101170694 A CN101170694 A CN 101170694A CN 200710047239 CN200710047239 CN 200710047239 CN 200710047239 A CN200710047239 A CN 200710047239A CN 101170694 A CN101170694 A CN 101170694A
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Abstract
The invention provides a signal real-time monitoring method for a coder. The method can process the input/output signal of the coder and then perform real-time monitoring. Specifically, the method comprises: the video output signal of a capture card is processed by minification in image size and reduction in image frame rate, and the processed video/audio signals are transmitted to a display; or the coded signal is decoded and then processed by minification in image size and reduction in image frame rate; and finally the processed video/audio signals are transmitted to the display. The monitoring signal is displayed on a small window of the display, so that the operator can judge whether the output signal of the coder is correct or wrong by the observation through the small window. The invention can reduce the complexity of system application and the cost as well, and is convenient to operate.
Description
Technical field
The present invention relates to the digital audio/video field, particularly a kind of method that is used for real time monitoring signals of encoding device.
Background technology
Code device is the device that the primary data of digital audio/video, information source is carried out encoding compression, promptly the various input signals of capture card input, as: composite video signal (composite), serial digital interface (SDI) and S terminal are imported code signals such as (S-Video) and are converted to and meet as Mpeg2, the code stream of information source such as AVC or AVS standard H.264/MPEG-4.When encoder is worked, for correctness and the validity that guarantees the receiving terminal signal, often need be in signal transmitting terminal monitoring encoder operate as normal whether, whether encoder has predetermined output signal.At present, common way is that the output signal of encoder is inserted the terminal equipment that can separate corresponding code stream, again the output signal of terminal is sent into display unit and shows, monitors whether operate as normal of encoder with this.This method not only needs to increase monitoring equipment, has increased the complexity of system equipment, and has brought very big inconvenience for the monitoring of encoder.
Summary of the invention
The purpose of this invention is to provide a kind of method that is used for real time monitoring signals of encoding device, promptly utilize the processing module of code device itself, and do not need to increase in addition decoding terminal and display unit, and only need monitor the real-time monitoring that image that code device display unit that main control system is joined shows just can be realized signals of encoding device.
In order to solve the problems of the technologies described above, the present invention has adopted following technological means: a kind of real time monitoring signals method of code device, described method is used for the input/output signal of code device is monitored, to judge whether operate as normal of code device, the signal whether output is expected, described method comprises the steps:
Step 1, code device are gathered video input signals by capture card, and described input signal comprises analog signal and digital signal;
Step 2, if step 1 gathers be analog signal, then analog signal becomes digital signal to export by analog-to-digital conversion; If what step 1 was gathered is digital signal, then export original signal;
Step 3, when the monitoring code device input signal the time, jump to step 6; When monitoring the output signal of code device, continue step 4;
Step 4, the output signal of capture card is encoded according to coding standard;
Step 8, the display unit of the main control computer of the vision signal of step 7 output and audio signal input coding device is shown in real time and plays, can monitor the input/output signal of code device by window unsteady in the display unit.
Further, the composite video signal (composite) that the described analog signal of step 1 comprises and S terminal input (S-Video) signal, described digital signal is serial digital interface (SDI) signal;
The described coding standard of step 4 can be MPEG2, MPEG4, H.264 or among the AVS any one;
The interval sampling mode that picture size described in step 6 or the step 7 is dwindled by image pixel realizes;
Frame per second reduction described in step 6 or the step 7 realizes by the interval sampling mode to frame per second;
Large scale described in step 6 or the step 7 is 720 * 576 or 720 * 480 pixels, and described small size is 176 * 144 or 90 * 60 pixels;
High frame per second described in step 6 or the step 7 is 25 frame per seconds or 29.97 frame per seconds; Described low frame per second is 9 frame per seconds or 10 frame per seconds.
Adopt the real time monitoring signals method of a kind of code device of the present invention, compared with prior art, signal real time monitoring function and encoding function can be integrated in one, need not increases monitoring equipment in addition at the output of encoder, reduced equipment complexity, reduced use cost, it is convenient that monitoring function is realized.
Description of drawings
The real time monitoring signals method of code device of the present invention is provided in detail by following embodiment and accompanying drawing.
Fig. 1 to Fig. 4 is the schematic flow sheet of the specific embodiment of the invention.
Embodiment
Below will be described in further detail the code device with signal real time monitoring function of the present invention.
Embodiment one
The real time monitoring signals method of a kind of code device of the present invention, as shown in Figure 1, described method comprises the steps:
S1, code device are gathered the audio frequency and video input signal by capture card, and described input signal comprises analog signal and digital signal;
S2, the vision signal of gathering as if step S1 are analog signal, then analog signal are become digital signal output by analog-to-digital conversion; If the vision signal that step S1 gathers is a digital signal, then export original signal;
S3, the formed large-size images of the vision signal of exporting among the step S2 is carried out size dwindle processing, form little image;
S4, reduce and handle, form the image of low frame per second carry out frame per second through step S3 formed little image;
S5, the display unit of the main control computer of the vision signal of step S4 output and audio signal input coding device is shown in real time and plays, can monitor the input/output signal of code device by window unsteady in the display unit.
What export among the step S2 is digital YUV signal, picture size is dwindled the large-size images of handling original 720 * 576, Width is respectively removed 8 pixels by the right and left, take uniformly-spaced down-sampling of 4:1 then, short transverse is directly carried out uniformly-spaced down-sampling of 4:1, dwindles into 176 * 144 small-sized image; The image frame per second reduces to be handled the image of the high frame per second of 25fps (pal mode), and the extracted at equal intervals that keeps a frame by interval two frames is lowered into the image that 9fps hangs down frame per second, exports display again to.
Embodiment two
The real time monitoring signals method of a kind of code device of the present invention, as shown in Figure 2, described method comprises the steps:
S1, code device are gathered the audio frequency and video input signal by capture card, and described input signal comprises analog signal and digital signal;
S2, the vision signal of gathering as if step S1 are analog signal, then analog signal are become digital signal output by analog-to-digital conversion; If the vision signal that step S1 gathers is a digital signal, then export original signal;
S3, the vision signal of exporting among the step S2 is carried out frame per second reduce to handle, form the image of low frame per second;
S4, dwindle processing, form little image carrying out size through step S3 formed image;
S5, the display unit of the main control computer of the vision signal of step S4 output and audio signal input coding device is shown in real time and plays, can monitor the input/output signal of code device by window unsteady in the display unit.
What export among the step S2 is digital YUV signal, and picture size is dwindled the large-size images of handling original 720 * 480, and Width and short transverse are all taked uniformly-spaced down-sampling of 4:1, dwindle into 90 * 60 small-sized image; The image frame per second reduces to be handled the image of the high frame per second of 29.97fps (pal mode), and the extracted at equal intervals that keeps a frame by interval two frames is lowered into the image that 10fps hangs down frame per second, exports display again to.
Embodiment three
The real time monitoring signals method of a kind of code device of the present invention, as shown in Figure 3, described method comprises the steps:
S1, code device are gathered the audio frequency and video input signal by capture card, and described input signal comprises analog signal and digital signal;
S2, the vision signal of gathering as if step S1 are analog signal, then analog signal are become digital signal output by analog-to-digital conversion; If the vision signal that step S1 gathers is a digital signal, then export original signal;
S3, the output signal of capture card is encoded according to coding standard;
S4, will carry out exporting after the decoding of corresponding method through the vision signal of coding;
S5, the formed large-size images of the vision signal of exporting among the step S4 is carried out size dwindle, form little image;
S6, reduce and handle the image that forms low frame per second carry out frame per second through step S5 formed little image;
S7, the display unit of the main control computer of the vision signal of step S6 output and audio signal input coding device is shown in real time and plays, can monitor the input/output signal of code device by window unsteady in the display unit.
What export among the step S2 is digital YUV signal, picture size is dwindled the large-size images of handling original 720 * 576, Width is respectively removed 8 pixels by the right and left, take uniformly-spaced down-sampling of 4:1 then, short transverse is directly carried out uniformly-spaced down-sampling of 4:1, dwindles into 176 * 144 small-sized image; The image frame per second reduces to be handled the image of the high frame per second of 25fps (pal mode), and the extracted at equal intervals that keeps a frame by interval two frames is lowered into the image that 9fps hangs down frame per second, exports display again to.
Embodiment four
The real time monitoring signals method of a kind of code device of the present invention, as shown in Figure 4, described method comprises the steps:
S1, code device are gathered the audio frequency and video input signal by capture card, and described input signal comprises analog signal and digital signal;
S2, the vision signal of gathering as if step S1 are analog signal, then analog signal are become digital signal output by analog-to-digital conversion; If the vision signal that step S1 gathers is a digital signal, then export original signal;
S3, the output signal of capture card is encoded according to coding standard;
S4, will carry out exporting after the decoding of corresponding method through the vision signal of coding;
S5, the vision signal of exporting among the step S4 is carried out the image that frame per second reduce to handle forms low frame per second;
S6, dwindle, form little image carrying out size through step S5 formed image;
S7, the display unit of the main control computer of the vision signal of step S6 output and audio signal input coding device is shown in real time and plays, can monitor the input/output signal of code device by window unsteady in the display unit.
What export among the step S2 is digital YUV signal, and picture size is dwindled the large-size images of handling original 720 * 480, and Width and short transverse are all taked uniformly-spaced down-sampling of 4:1, dwindle into 90 * 60 small-sized image; The image frame per second reduces to be handled the image of the high frame per second of 29.97fps (pal mode), and the extracted at equal intervals that keeps a frame by interval two frames is lowered into the image that 10fps hangs down frame per second, exports display again to.
Observe the monitoring window of display among the above embodiment, can monitor out whether operate as normal of encoder easily.
Claims (7)
1. the real time monitoring signals method of a code device, described method is used for the input/output signal of code device is monitored, and to judge whether operate as normal of code device, whether exports the signal of expectation, it is characterized in that described method comprises the steps:
Step 1, code device are gathered the audio frequency and video input signal by capture card, and described input signal comprises analog signal and digital signal;
Step 2, if the vision signal of step 1 collection is an analog signal, then analog signal is become digital signal output by analog-to-digital conversion; If the vision signal of step 1 collection is a digital signal, then export original signal;
Step 3, when the monitoring code device input signal the time, jump to step 6; When monitoring the output signal of code device, continue step 4;
Step 4, the output signal of capture card is encoded according to coding standard;
Step 5, will be through decode the accordingly back output of the vision signal of coding;
Step 6, the formed large-size images of the vision signal of exporting in step 2 or the step 5 is carried out size dwindle, form little image; Perhaps the formed high frame rate image of the vision signal of exporting in step 2 or the step 5 is carried out frame per second and reduce, form the image of low frame per second;
Step 7, reduce and handle the image that forms low frame per second carry out frame per second through step 6 formed little image; Perhaps the formed low frame rate image of step 6 is carried out size and dwindle the little image of processing formation;
Step 8, the display unit of the main control computer of the vision signal of step 7 output and audio signal input coding device is shown in real time and plays, can monitor the input/output signal of code device by window unsteady in the display unit.
2. the real time monitoring signals method of code device as claimed in claim 1, it is characterized in that: the described analog signal of step 1 comprises composite video signal and S terminal input signal, and described digital signal is the serial digital interface signal.
3. the real time monitoring signals method of code device as claimed in claim 1 is characterized in that: the described coding standard of step 4 can be MPEG2, MPEG4, H.264 or among the AVS any one.
4. the real time monitoring signals method of code device as claimed in claim 1, it is characterized in that: the interval sampling mode that the picture size described in step 6 or the step 7 is dwindled by image pixel realizes.
5. the real time monitoring signals method of code device as claimed in claim 1 is characterized in that: the frame per second described in step 6 or the step 7 reduces and realizes by the interval sampling mode to frame per second.
6. the real time monitoring signals method of code device as claimed in claim 1, it is characterized in that: the large scale described in step 6 or the step 7 is 720 * 576 or 720 * 480 pixels, described small size is 176 * 144 or 90 * 60 pixels.
7. the real time monitoring signals method of code device as claimed in claim 1, it is characterized in that: the high frame per second described in step 6 or the step 7 is 25 frame per seconds or 29.97 frame per seconds; Described low frame per second is 9 frame per seconds or 10 frame per seconds.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811334A (en) * | 2012-07-10 | 2012-12-05 | 杭州海康威视数字技术股份有限公司 | System and method for transmitting high-definition video signal in dome camera |
| CN103202703A (en) * | 2013-03-21 | 2013-07-17 | 广州龙之杰科技有限公司 | Medical swallowing image collection device and image processing method thereof |
| CN113207016A (en) * | 2021-03-29 | 2021-08-03 | 新华三大数据技术有限公司 | Virtual machine image frame rate control method, network device and storage medium |
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2007
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811334A (en) * | 2012-07-10 | 2012-12-05 | 杭州海康威视数字技术股份有限公司 | System and method for transmitting high-definition video signal in dome camera |
| CN103202703A (en) * | 2013-03-21 | 2013-07-17 | 广州龙之杰科技有限公司 | Medical swallowing image collection device and image processing method thereof |
| CN113207016A (en) * | 2021-03-29 | 2021-08-03 | 新华三大数据技术有限公司 | Virtual machine image frame rate control method, network device and storage medium |
| CN113207016B (en) * | 2021-03-29 | 2022-05-27 | 新华三大数据技术有限公司 | Virtual machine image frame rate control method, network equipment and storage medium |
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Open date: 20080430 |