CN102724459A - Analog video signal format determination system and method and related devices - Google Patents
Analog video signal format determination system and method and related devices Download PDFInfo
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- CN102724459A CN102724459A CN2012101519365A CN201210151936A CN102724459A CN 102724459 A CN102724459 A CN 102724459A CN 2012101519365 A CN2012101519365 A CN 2012101519365A CN 201210151936 A CN201210151936 A CN 201210151936A CN 102724459 A CN102724459 A CN 102724459A
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Abstract
The invention discloses an analog video signal format determination system and method and related devices, which are used for simplifying the matching process of analog video signal format types and improving the compatibility of a receiving device. The analog video signal format determination system comprises a video signal acquisition device and a plurality of video signal receiving devices, wherein each video signal receiving device is used for generating carrier signals with scheduled frequency when having a high-definition analog video signal decoding capacity, and each video signal receiving device is also used for outputting the carrier signals with the scheduled frequency to the video signal acquisition device; and the video signal acquisition device is used for determining whether to receive the carrier signals with the scheduled frequency sent by the video signal receiving devices; and the video signal acquisition device is also used for determining whether the video signal receiving devices support the high-definition analog video signal format when receiving the carrier signals with the scheduled frequency sent by the video signal receiving devices, otherwise, the video signal acquisition device determines that the video signal receiving devices do not support the high-definition analog video signal format.
Description
Technical field
The present invention relates to technical field of video monitoring, relate in particular to a kind of analog video signal form and confirm system, method and relevant device.
Background technology
In the technical field of video monitoring, video monitoring system generally includes the video signal collection apparatus of front end and the video signal receiving apparatus of rear end.After video signal collection apparatus collects vision signal; After processing such as coding and compression; Give video signal receiving apparatus with video signal transmission, video signal receiving apparatus shows decoding video signal and the decompression that receives afterwards.
Wherein, Video signal receiving apparatus comprises DVR, network video coder, optical transceiver etc.; To traditional CVBS analog video signal; The video modulus conversion chip that these equipment adopt can be judged the form of analog video signal according to the chrominance subcarrier frequency in the video analog signal that receives, thereby can realize detecting automatically the analog video signal form that receives, and matees decoding mode corresponding automatically.
Popularization along with 1280H and above high definition analog video technology; Because there is evident difference in the transmission technology of this type high definition analog video signal with the transmission technology characteristic of CVBS analog video signal in the past, is that video signal collection apparatus or video signal receiving apparatus all need carry out adaptive to the analog video signal of two kinds of Format Types (SD form and high-definition format).But; The existing video signal collecting device (for example; Analog video camera) the transmission chip of end is owing to can't obtain the video signal format type that receiving equipment is supported; Thereby, can't learn whether receiving equipment supports 1280H high definition analog video signal form, if the analog video signal that video signal collection apparatus uses the transmission of 1280H high definition analog video signal form to collect; And the receiving equipment of rear end is not supported high definition analog video signal decoding technique, and then can occur does not have abnormal conditions such as image, Hua Ping.
In order to address the above problem, in the prior art, adopt artificial matching way usually; Analog video signal Format Type to the transmission of the video signal collection apparatus of front end matees; This process is complicated operation not only, simultaneously, has also reduced the compatibility of video signal receiving apparatus.
Summary of the invention
The embodiment of the invention provides a kind of analog video signal form to confirm system, method and relevant device, in order to simplify the matching process of analog video signal Format Type, improves the compatibility of receiving equipment.
The embodiment of the invention provides a kind of analog video signal form to confirm system, comprises video signal collection apparatus and a plurality of video signal receiving apparatus, wherein:
Said video signal receiving apparatus is used for when self possessing high definition analog video signal decoding capability, generates the carrier signal of preset frequency, and the carrier signal of said preset frequency is sent to said video signal collection apparatus;
Said video signal collection apparatus is used for when the carrier signal of the preset frequency that receives said video signal receiving apparatus transmission, confirms said video signal receiving apparatus support high definition analog video signal form; Otherwise, confirm that said video signal receiving apparatus do not support high definition analog video signal form.
The embodiment of the invention provides a kind of video signal receiving apparatus, comprising:
Signal generator is used to generate the carrier signal of preset frequency, and exports the carrier signal of said preset frequency to video signal collection apparatus.
The embodiment of the invention provides a kind of video signal collection apparatus, comprising:
Band pass filter is used to extract the carrier signal of the preset frequency that video signal receiving apparatus sends;
Frequency discriminator block; Be used to judge whether said band pass filter extracts the carrier signal of preset frequency; In judged result when being; Confirm that said video signal receiving apparatus supports high definition analog video signal form, for not the time, confirm that said video signal receiving apparatus do not support high definition analog video signal form in judged result.
The embodiment of the invention provides a kind of analog video signal form to confirm method, is sent the carrier signal of preset frequency to video signal collection apparatus by the video signal receiving apparatus that possesses high definition analog video signal decoding capability; And said method, comprising:
Video signal collection apparatus is judged the carrier signal of the preset frequency that whether receives the video signal receiving apparatus transmission; And
When the carrier signal of the preset frequency that receives the video signal receiving apparatus transmission, confirm this video signal receiving apparatus support high definition analog video signal form; In the carrier signal that does not receive the preset frequency that video signal receiving apparatus sends, confirm that this video signal receiving apparatus do not support high definition analog video signal form.
The analog video signal form that the embodiment of the invention provides is confirmed system, method and relevant device; When video signal receiving apparatus possesses high definition analog video signal decoding capability; Generate the carrier signal of preset frequency, and the carrier signal of said preset frequency is sent to said video signal collection apparatus, owing to do not possess the carrier signal that the video signal receiving apparatus of high definition analog video signal decoding capability can't generate and send this preset frequency; Thereby; Make video signal collection apparatus through judging the carrier signal that self whether receives preset frequency can judge whether video signal receiving apparatus supports high definition analog video signal form, whole process need not artificial the participation, therefore; Simplify the process that the analog video signal Format Type is mated, improved the compatibility of video signal receiving apparatus.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Fig. 1 is in the embodiment of the invention, SD analog video signal and high definition analog video signal bandwidth occupancy sketch map;
Fig. 2 is in the embodiment of the invention, and the analog video signal form is confirmed the structural representation of system;
Fig. 3 is in the embodiment of the invention, the structural representation of video signal receiving apparatus;
Fig. 4 is in the embodiment of the invention, the structural representation of video signal collection apparatus;
Fig. 5 is in the embodiment of the invention, the syndeton sketch map between video signal collection apparatus 201 and the video signal receiving apparatus 202;
Fig. 6 is in the embodiment of the invention, and the analog video signal form is confirmed the implementing procedure sketch map of method.
Embodiment
In order to simplify the matching process of analog video signal Format Type, improve the compatibility of receiving equipment, the embodiment of the invention provides a kind of analog video signal form to confirm system, method and relevant device.
Below in conjunction with Figure of description the preferred embodiments of the present invention are described; Be to be understood that; Preferred embodiment described herein only is used for explanation and explains the present invention; And be not used in qualification the present invention, and under the situation of not conflicting, embodiment and the characteristic among the embodiment among the present invention can make up each other.
Embodiment one
According to SD analog video signal and the characteristic of high definition analog video signal on frequency domain; Adopt the method that detects higher frequency signals; Can judge whether the video signal receiving apparatus of rear end supports the high definition analog video signal, and select the form of output analog video signal according to judged result.The frequency domain scope of SD analog video signal is 0 ~ 6MHz, and the frequency range of high definition analog video signal is 0 ~ 20MHz, therefore, can select a frequency values f
cMuch larger than the carrier signal of 20MHZ, under the prerequisite that does not influence the transmission of SD analog video signal or high definition analog video signal, as the carrier frequency value that detects, wherein, f
cSpan can be F>=N+1, wherein, F representes preset frequency, N representes the analog video signal upper limiting frequency.Preferably, f
cSpan can be 20MHZ ~ 50MHz, perhaps can be for more than the 50MHz, for the ease of describing, in the embodiment of the invention with f
c=36MHz is that example describes.
As shown in Figure 1, be SD analog video signal and high definition analog video signal bandwidth occupancy sketch map, among Fig. 1, the bandwidth of SD analog video signal is 6MHz, and the high definition analog video signal comprises luminance and chrominance information, and its total bandwidth is 20MHz.Transmission and reception to analog signal; The SD analog video signal adopts the low pass filter of 6MHz, and the high definition analog video signal adopts the low pass filter of 20MHz, need to prove; Shown in Figure 1 for resolution be under 720p (25 frames, the 30 frames) situation; High definition analog video signal bandwidth occupancy sketch map, it only is used for explanation of the present invention, and is not used in qualification of the present invention.The carrier signal frequency f that the present invention is used to detect
cMuch larger than 20MHz, therefore can not influence the transmission quality of analog video signal.
Based on above-mentioned analysis, as shown in Figure 2, the analog video signal form that provides for the embodiment of the invention is confirmed the structural representation of system, comprising: video signal collection apparatus 201 and at least one video signal receiving apparatus 202, wherein:
Each video signal receiving apparatus 202 is used for when self possessing high definition analog video signal decoding capability, generates the carrier signal of preset frequency, and exports the carrier signal of preset frequencies to video signal collection apparatus 201;
In the practical implementation; Each video signal receiving apparatus 202 is when self possessing high definition analog video signal decoding capability; Can be according to the carrier signal of predetermined period to the said preset frequency of video signal collection apparatus 201 output, can certainly continuation to the carrier signal of video signal collection apparatus 201 output preset frequencies.
Video signal collection apparatus 201 is used to judge the carrier signal that self whether receives the preset frequency that video signal receiving apparatus 202 sends; And when the carrier signal of the preset frequency that receives video signal receiving apparatus 202 transmissions, confirm this video signal receiving apparatus 202 support high definition analog video signal forms; Otherwise, confirm that video signal receiving apparatus 202 do not support high definition analog video signal form.
During practical implementation, when video signal receiving apparatus 202 possesses high definition analog video signal decoding capability (for example can be 1280H high definition analog video signal receiving equipment), can be f with a preset frequency according to predetermined period
cCarrier signal send to the video signal collection apparatus of opposite end, video signal collection apparatus 201 can be f through a center frequency point
cBand pass filter this carrier signal is leached; And lock the carrier signal of this preset frequency; Like this, exist, can judge that then the video signal receiving apparatus 202 of opposite end is supported high definition analog video signal form in case judge the carrier signal of this preset frequency; Thereby to this video signal receiving apparatus output analog video signal the time, can adopt the output of high definition analog video signal.Owing to do not support the video signal receiving apparatus 202 of high definition analog video signal can't send the carrier signal of this reverse preset frequency; Video signal collection apparatus 201 can't get access to the carrier signal of this preset frequency; Thereby the video signal receiving apparatus that can judge the opposite end is not supported high definition analog video signal form; Therefore, when the analog video signal that output collects, will adopt the output of SD analog video signal.If when the rear end of video signal collection apparatus 201 did not have video signal receiving apparatus 202, video signal collection apparatus 201 can't get access to the carrier signal of this preset frequency equally, thereby also will adopt the output of SD analog video signal.Simultaneously; Need send the carrier signal of this preset frequency according to predetermined period to video signal collection apparatus owing to possess the raise the price video signal receiving apparatus of ability of high definition analog video signal; When this video signal receiving apparatus is changed or is safeguarded; Video signal collection apparatus can judge immediately whether the video signal receiving apparatus of front end supports high definition analog video signal form, and selects the analog video signal output of suitable format according to result of determination.
Embodiment two
During practical implementation; Because high-definition video signal comprises the high-definition video signal (for example rate is the high-definition video signal of 720P respectively) of high-resolution high-definition video signal (for example rate is the high-definition video signal of 1080P respectively) and low resolution; If video signal receiving apparatus is supported high-resolution high-definition video signal; To the high-definition video signal of its output high-resolution or low resolution all can, still, if when video signal receiving apparatus is supported the high-definition video signal of low resolution; Export high-resolution high-definition video signal to it, will cause video signal receiving apparatus can't decode and cause showing and make mistakes.
Based on this, in the embodiment of the invention, preset frequency can but be not limited to comprise first preset frequency and second preset frequency, wherein, first preset frequency is higher than second preset frequency.For example; When if video signal receiving apparatus is supported the 1080p high-definition video signal; Can be the carrier signal of 45M to the video signal collection apparatus output frequency, and when video signal receiving apparatus is supported the 720p high-definition video signal, can export the carrier signal of 36M to video signal collection apparatus.After video signal collection apparatus receives the carrier signal of the preset frequency that video signal receiving apparatus sends; Can further confirm the frequency of this carrier signal; When confirming that this carrier signal is first preset frequency, to video signal receiving apparatus output first kind high definition analog video signal or second type of high definition analog video signal; If when confirming that this carrier signal is second preset frequency, to second type of high definition analog video signal of video signal receiving apparatus output.
Among the embodiment two, comprise that with the high definition analog video signal vision signal of two kinds of resolution is that example is illustrated, still; During practical implementation, the high definition analog video signal can comprise multiple, correspondingly; Predetermined frequency signal also can comprise multiple; When judging that video signal receiving apparatus is supported the high-definition video signal of which kind of resolution, only need judge to get final product according to the principle that the embodiment of the invention provides, promptly pass through video reception apparatus periodicity or continue carrier signal to preset frequency; The preset frequency of this carrier signal is higher than the analog video signal upper limiting frequency, and remains with the space of 1M at least with this analog video signal upper limiting frequency.
Need to prove; During practical implementation; Embodiment two judges whether the high-definition video signal of which kind of resolution of video signal receiving apparatus support can support high-definition video signal to carry out prior to judging video signal receiving apparatus among the embodiment one; This be because, no matter judge the high-definition video signal which kind of resolution video signal receiving apparatus supports, can judge that all video signal receiving apparatus supports high-definition video signal.
For the ease of description, during follow-up describing, all to judge whether video signal receiving apparatus is supported high-definition video signal and be implemented as example prior to the high-definition video signal of judging which kind of resolution of video signal receiving apparatus support.
The analog video signal form that the embodiment of the invention provides is confirmed system, possesses the carrier signal of the video signal receiving apparatus of high definition analog video signal decoding capability to video signal collection apparatus transmission preset frequency, makes whether video signal collection apparatus exists through the carrier signal that detects this preset frequency; Just can judge whether video signal receiving apparatus supports the high definition analog video signal; If, then export the high definition analog video signal, otherwise; Output SD analog video signal; Reach the purpose of automatic coupling analog video signal output format, thereby greatly improve the compatibility of system, remove manually-operated inconvenience from.
Embodiment three
As shown in Figure 3, the structural representation of the video signal receiving apparatus that provides for the embodiment of the invention comprises:
Signal generator 2021 is used to generate the carrier signal of preset frequency, and the carrier signal of the preset frequency that generates to video signal collection apparatus output.
During practical implementation; Connect through transmission cable between video signal receiving apparatus 202 and the video signal collection apparatus 201, signal generator 2021 carrier signal that will generate, preset frequency is exported to video signal collection apparatus 201 through the transmission cable between the two.
During practical implementation; Video signal receiving apparatus 202 can also comprise low pass filter 2022 and analog video signal receiver module 2023; Wherein, Low pass filter 2022 can be used to extract high definition analog video signal or the SD analog video signal that video signal collection apparatus sends, and high definition analog video signal or SD analog video signal that analog video signal receiver module 2023 can be used for low pass filter 2022 is extracted carry out processing such as demodulation.Preferably, if when this video signal receiving apparatus 202 is supported high definition analog video signals, low pass filter 2022 can be the 20MHz low pass filter.
Need to prove that during practical implementation, the analog video signal receiver module 2023 of video signal receiving apparatus protection, signal generator 2021 and low pass filter 2022 can use independently chip circuit realization, also can in same chips, realize.
Embodiment four
As shown in Figure 4, the structural representation of the video signal collection apparatus that provides for the embodiment of the invention comprises:
Concrete, the center frequency point of band pass filter 2011 is identical with preset frequency, thereby can from transmission cable, extract the carrier signal of preset frequency.
Concrete; When if band pass filter 2011 extracts the carrier signal of preset frequency; Can be through the carrier signal of frequency discriminator block 2012 these preset frequencies of locking; And judge in view of the above whether band pass filter has extracted the carrier signal of preset frequency, if confirmed to extract the carrier signal of this preset frequency, explain that then the video signal receiving apparatus 202 of opposite end is supported high definition analog video signal form; If confirm not extract the carrier signal of this preset frequency, explain that then the video signal receiving apparatus 202 of opposite end is not supported high definition analog video signal form.
During practical implementation, video signal collection apparatus 201 can also comprise:
Analog video signal sending module 2013 is used for the result of determination according to frequency discriminator block 2012, when definite video signal receiving apparatus 202 is supported high definition analog video signal form, to video signal receiving apparatus 202 output high definition analog video signals; And definite video signal receiving apparatus 202 is not when supporting high definition analog video signal form, to video signal receiving apparatus 202 output SD analog video signals.
During practical implementation, preset frequency comprises first preset frequency and second preset frequency, and said first preset frequency is higher than second preset frequency; Preferably; Support the high-definition video signal of which kind of resolution in order further to confirm video signal receiving apparatus; Frequency discriminator block 2012 in the time of can also being used for confirming that preset frequency is first preset frequency, is confirmed video signal receiving apparatus support first kind analog video signal form; And definite preset frequency is when being second preset frequency, confirms that video signal receiving apparatus supports the second analoglike video signal format;
Analog video signal sending module 2013; In the time of can also being used for frequency discriminator block 2012 and confirming that video signal receiving apparatus are supported first kind analog video signal form, to video signal receiving apparatus output first kind high definition analog video signal or second type of high definition analog video signal; And when being used for frequency discriminator block 2012 and confirming that video signal receiving apparatus are supported the second analoglike video signal format, to second type of high definition analog video signal of video signal receiving apparatus output.
Need to prove that during practical implementation, the analog video signal sending module 2013 that video signal receiving apparatus 201 comprises, frequency discriminator block 2012 and band pass filter 2011 can use independently chip circuit realization, also can in same chips, realize.
Based on embodiment three and embodiment four; As shown in Figure 5; Be the syndeton sketch map between video signal collection apparatus 201 and the video signal receiving apparatus 202, connect through transmission cable between the two, wherein; Video signal collection apparatus 201 comprises analog video signal sending module 2013, band pass filter 2011 and frequency discriminator block 2012; Video signal receiving apparatus 202 comprises signal generator 2021, low pass filter 2022 and analog video signal receiver module 2023, and the concrete function of each module is identical with the function of each module among embodiment three and the embodiment four, repeats no more here.
Based on same inventive concept; Also provide a kind of analog video signal form to confirm method in the embodiment of the invention; Because principle and analog video signal form that this method is dealt with problems are confirmed system similarity, so the enforcement of this method can repeat part and repeat no more referring to system implementation.
In the practical implementation, when the video signal receiving apparatus of video signal collection apparatus opposite end possessed high definition analog video signal decoding capability, this video signal receiving apparatus will be to this video signal collection apparatus periodically or the carrier signal of the output preset frequency of continuation; When the video signal receiving apparatus of video signal collection apparatus opposite end does not possess high definition analog video signal decoding capability, with carrier signal from preset frequency to video signal collection apparatus that can not export, preferably; Preset frequency can comprise first preset frequency and second preset frequency; Wherein, first preset frequency is higher than second preset frequency, according to the frequency values of the preset frequency of determining that receives; Can further determine video signal receiving apparatus and support which kind of high-frequency high definition analog video signal; Based on this, the embodiment of the invention provides a kind of analog video signal form to confirm method, and is as shown in Figure 6; For the analog video signal form is confirmed to may further comprise the steps the implementing procedure sketch map of method:
S601, video signal collection apparatus judge the carrier signal of the preset frequency that self whether receives video signal receiving apparatus output, in judged result when being, execution in step S602, otherwise, execution in step S603;
S602, confirm that this video signal receiving apparatus supports high definition analog video signal form, and execution in step S604;
S603, confirm that this video signal receiving apparatus do not support high definition analog video signal form, and execution in step S605;
S604, judge that the preset frequency receive is that first preset frequency still is second preset frequency, and when confirming as first preset frequency, execution in step S606, when confirming as second preset frequency, execution in step S607;
S605, to this video signal receiving apparatus output SD analog video signal, flow process finishes;
S606, to this video signal receiving apparatus output first kind high definition analog video signal or second type of high definition analog video signal;
S607, to second type of high definition analog video signal of this video signal receiving apparatus output.
The analog video signal form that the embodiment of the invention provides is confirmed system, method and relevant device; When video signal receiving apparatus possesses high definition analog video signal decoding capability; Generate the carrier signal of preset frequency, and the carrier signal of said preset frequency is sent to said video signal collection apparatus, owing to do not possess the carrier signal that the video signal receiving apparatus of high definition analog video signal decoding capability can't generate and send this preset frequency; Thereby; Make video signal collection apparatus through judging the carrier signal that self whether receives preset frequency can judge whether video signal receiving apparatus supports high definition analog video signal form, whole process need not artificial the participation, therefore; Simplify the process that the analog video signal Format Type is mated, improved the compatibility of video signal receiving apparatus.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. an analog video signal form is confirmed system, it is characterized in that, comprises video signal collection apparatus and at least one video signal receiving apparatus, wherein:
Each video signal receiving apparatus is used for when self possessing high definition analog video signal decoding capability, generates the carrier signal of preset frequency, and exports the carrier signal of said preset frequency to said video signal collection apparatus;
Said video signal collection apparatus is used to judge the carrier signal that self whether receives the preset frequency that video signal receiving apparatus sends; And when the carrier signal of the preset frequency that receives said video signal receiving apparatus transmission, confirm said video signal receiving apparatus support high definition analog video signal form; Otherwise, confirm that said video signal receiving apparatus do not support high definition analog video signal form.
2. analog video signal form as claimed in claim 1 is confirmed system, it is characterized in that,
Said video signal collection apparatus also is used for when confirming that said video signal receiving apparatus is supported high definition analog video signal form, to said video signal receiving apparatus output high definition analog video signal; And when confirming that said video signal receiving apparatus is not supported high definition analog video signal form, to said video signal receiving apparatus output SD analog video signal.
3. analog video signal form as claimed in claim 2 is confirmed system, it is characterized in that, preset frequency comprises first preset frequency and second preset frequency at least, and said first preset frequency is higher than second preset frequency; And
Said video signal collection apparatus is when being used for also confirming that said preset frequency is first preset frequency, to said video signal receiving apparatus output first kind high definition analog video signal or second type of high definition analog video signal; And when confirming that said preset frequency is second preset frequency, to second type of high definition analog video signal of said video signal receiving apparatus output.
4. confirm system like claim 1,2 or 3 described analog video signal forms, it is characterized in that the span of said preset frequency is F >=N+1, wherein, F representes preset frequency, and N representes the analog video signal upper limiting frequency.
5. analog video signal form as claimed in claim 1 is confirmed system, it is characterized in that,
Said video signal receiving apparatus also is used for when self possessing high definition analog video signal decoding capability, exporting the carrier signal of said preset frequency to said video signal collection apparatus according to predetermined period; Perhaps continuation is exported the carrier signal of said preset frequency to said video signal collection apparatus.
6. a video signal receiving apparatus is characterized in that, comprising:
Signal generator is used to generate the carrier signal of preset frequency, and exports the carrier signal of said preset frequency to video signal collection apparatus.
7. video signal receiving apparatus as claimed in claim 6 is characterized in that, also comprises:
Low pass filter is used to receive and extract high definition analog video signal or the SD analog video signal that video signal collection apparatus sends;
The analog video signal receiver module, the high definition analog video signal or the SD analog video signal that are used for said low pass filter is extracted are handled.
8. a video signal collection apparatus is characterized in that, comprising:
Band pass filter is used to extract the carrier signal of the preset frequency that video signal receiving apparatus sends;
Frequency discriminator block; Be used to judge whether said band pass filter extracts the carrier signal of preset frequency, if confirm said video signal receiving apparatus support high definition analog video signal form; If not, confirm that said video signal receiving apparatus do not support high definition analog video signal form.
9. video signal collection apparatus as claimed in claim 8 is characterized in that, also comprises:
The analog video signal sending module is used for when confirming that said video signal receiving apparatus is supported high definition analog video signal form, to said video signal receiving apparatus output high definition analog video signal; And when confirming that said video signal receiving apparatus is not supported high definition analog video signal form, to said video signal receiving apparatus output SD analog video signal.
10. video signal collection apparatus as claimed in claim 9 is characterized in that, preset frequency comprises first preset frequency and second preset frequency, and said first preset frequency is higher than second preset frequency; And
Said frequency discriminator block when being used for also confirming that said preset frequency is first preset frequency, is confirmed said video signal receiving apparatus support first kind analog video signal form; And when confirming that said preset frequency is second preset frequency, confirm that said video signal receiving apparatus supports the second analoglike video signal format;
Said analog video signal sending module; When also being used for said frequency discriminator block and confirming that said video signal receiving apparatus is supported first kind analog video signal form, to said video signal receiving apparatus output first kind high definition analog video signal or second type of high definition analog video signal; When said frequency discriminator block confirms that said video signal receiving apparatus is supported the second analoglike video signal format, to second type of high definition analog video signal of said video signal receiving apparatus output.
11. an analog video signal form is confirmed method, it is characterized in that, possesses the carrier signal of the video signal receiving apparatus of high definition analog video signal decoding capability to video signal collection apparatus output preset frequency; And
Said method comprises:
Video signal collection apparatus is judged the carrier signal of the preset frequency that self whether receives the video signal receiving apparatus transmission; And
When the carrier signal of the preset frequency that receives said video signal receiving apparatus output, confirm said video signal receiving apparatus support high definition analog video signal form; In the carrier signal of the preset frequency that does not receive the output of said video signal receiving apparatus, confirm that said video signal receiving apparatus do not support high definition analog video signal form.
12. method as claimed in claim 11 is characterized in that, also comprises:
Video signal collection apparatus is when confirming that said video signal receiving apparatus is supported high definition analog video signal form, to said video signal receiving apparatus output high definition analog video signal; And when confirming that said video signal receiving apparatus is not supported high definition analog video signal form, to said video signal receiving apparatus output SD analog video signal.
13. method as claimed in claim 12 is characterized in that, preset frequency comprises first preset frequency and second preset frequency, and said first preset frequency is higher than second preset frequency; And
Video signal collection apparatus specifically comprises to said video signal receiving apparatus output high definition analog video signal:
When video signal collection apparatus confirms that said preset frequency is first preset frequency, to said video signal receiving apparatus output first kind high definition analog video signal or second type of high definition analog video signal; And when confirming that said preset frequency is second preset frequency, to second type of high definition analog video signal of said video signal receiving apparatus output.
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| CN102724459B (en) | 2014-04-09 |
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