CN102611874B - Method and system for realizing low-power consumption high-definition video wireless transmission - Google Patents
Method and system for realizing low-power consumption high-definition video wireless transmission Download PDFInfo
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Abstract
The invention relates to a method and a system for realizing low-power consumption high-definition video wireless transmission. The method comprises the steps of: S1, performing pre-processing on video data to be transmitted; S2, transmitting audio and video data while detecting that the pre-processed video data to be transmitted has a video signal mark within a first preset time and a shutdown signal returned by a display terminal is not received; S3, receiving the audio and video data while detecting that the video signal mark exists within the second preset time and the shutdown signal returned by the display terminal is not received, and S4, displaying the audio and video data while detecting a human body signal within the third preset time. The automatic shutdown and starting-up of a transmitting terminal, a receiving terminal and a display terminal are achieved by pre-processing the video data to be transmitted and detecting whether the video signal and the human body signal exist or not, so that the bandwidth occupied in the transmitting process is reduced, the transmitting time and the receiving time are reduced, and the power consumption of a high-definition video wireless transmission system is effectively reduced.
Description
Technical field
The present invention relates to field of multimedia communication, relate in particular to a kind of HD video radio transmitting method and system that realizes low-power consumption.
Background technology
As everyone knows, in high-definition video wireless transmission system, when transmission range far away, definition requires just higher, system power consumption is also just larger, under general applicable cases, suppose that transmission range is 1000 meters of left and right, display terminal is 32 cun of liquid crystal display, now wireless receiving and dispatching part power is about 10 watts, display power is about 100 watts, by each parts power consumption situation in system is analyzed, can find that system power consumption mainly can be divided into two parts, a part is the transmission of audio, video data, receive and show, power consumption accounts for the more than 95% of total system power consumption, another part is the transmission of control signal, receive and management, power consumption generally accounts for below 5% of total system power consumption.Therefore, in high-definition video wireless transmission system, realize the power supply of intelligent management audio, video data radiating portion, receiving unit and display section, can effectively reduce system power dissipation.
At present, at transmitting terminal, first, the general transmission means adopting without compression in high-definition video wireless transmission system, raw video signal is all launched by wireless transmitter module, because high-definition video signal data volume is larger, therefore will be taken larger bandwidth and longer transmitting, time of reception; The second, transmitter module transmission video signal no matter whether in high-definition video wireless transmission system, the state in working on power always, because high-definition video signal wireless transmitter module power is larger, long charged work causes unnecessary energy dissipation; The 3rd, in high-definition video wireless transmission system, no matter whether transmitter module there is user before display terminal, once start after transmitting, and the state in working on power always, because high-definition video signal wireless transmitter module power is larger, long charged work causes unnecessary energy dissipation.
At present, at receiving terminal, first, receiver module transmission video signal no matter whether in high-definition video wireless transmission system, state in working on power always, due to larger for high-definition video signal wireless receiving module power, long charged work also will cause unnecessary energy dissipation; Second, in high-definition video wireless transmission system, no matter whether receiver module there is user before display terminal, once after starting to receive, and the state in working on power always, because high-definition video signal reception transmitter module power is larger, long charged work causes unnecessary energy dissipation.
At present, in existing consumer applications occasion, not whether display end not there is to user and the power supply that carries out is controlled, often occur in actual applications that user leaves the long period and situation that system is still worked, now also caused the non-productive work of system, waste energy; Exist high temperature to cause the potential safety hazards such as fire simultaneously.
Therefore,, along with the development of multimedia communication technology, provide a kind of high-definition video wireless transmission system of realizing low-power consumption to be necessary.
Summary of the invention
The technical problem to be solved in the present invention is, the defect for transmitting terminal, receiving terminal and the display end energy dissipation of the high-definition video wireless transmission system of above-mentioned prior art, provides a kind of HD video radio transmitting method and system that realizes low-power consumption.
The technical solution adopted for the present invention to solve the technical problems is: constructed a kind of HD video radio transmitting method of realizing low-power consumption, said method comprising the steps of:
S1. treat transmitting video data and carry out preliminary treatment;
S2. in the first Preset Time, detect and when pretreated video data to be transmitted has vision signal sign and do not receive the off signal that display end passes back, send audio, video data;
When vision signal sign S3. being detected and not receiving the off signal that display end passes back in the second Preset Time, receive audio, video data;
While S4. human body signal being detected in the 3rd Preset Time, show audio, video data.
In the method for the invention, described step S1 specifically comprises:
S11. whether the video data to be transmitted of judgement input there is vision signal, if so, performs step S12, if not, and repeating step S11;
S12. by multi-frame difference detecting moving object method, obtain the difference between present frame and consecutive frame, and judge whether described difference is greater than preset value, if, described present frame is motion frame, performs step S13, if not, described present frame is frozen frozen mass, transmits static sign;
S13. judge whether the motion of described motion frame is violent, if so, transmits whole frame video data, if not, transmitting moving area data.
In the method for the invention, in described step S2, specifically comprise:
S21. judge that pretreated video data to be transmitted in the first Preset Time, whether being detected has vision signal sign and whether receive the off signal that display end is passed back;
If vision signal sign S22. detected and do not receive the off signal that display end passes back, send audio, video data, and send the order that has vision signal sign;
If vision signal sign S23. do not detected in the first Preset Time, do not send audio, video data, and send the order of ignoring frequency marker;
If S24. receive the off signal that display end is passed back, do not send audio, video data.
In the method for the invention, described step S3 specifically comprises:
S31. judge and vision signal sign in the second Preset Time, whether detected and whether receive the off signal that display end is passed back;
If vision signal sign S32. detected and do not receive the off signal that display end is passed back in the second Preset Time, receiving audio, video data;
If vision signal sign S33. do not detected in the second Preset Time, or, receive the off signal that display end is passed back, do not receive audio, video data.
In the method for the invention, described step S4 specifically comprises:
S41. judge in the 3rd Preset Time human body signal whether detected, if so, perform step S42, if not, perform step S43;
S42. show audio, video data;
S43. judge in default delay time human body signal whether detected, if so, perform step S44, if not, perform step S45;
S44. restart to detect, and cancel this default delay time;
S45. do not show audio, video data, and send off signal to transmitting terminal and receiving terminal.
The present invention has also constructed a kind of high-definition video wireless transmission system of realizing low-power consumption, and described system comprises:
Be used for treating transmitting video data and carry out pretreated pretreatment unit;
Be connected with described pretreatment unit and for receiving the first control signal Transmit-Receive Unit of the off signal that pretreated video data to be transmitted and display end pass back;
Be connected and whether have for detect pretreated video data to be transmitted in the first Preset Time the first control unit of vision signal sign with described the first control signal Transmit-Receive Unit;
Be connected respectively and send when vision signal sign being detected and do not receive the off signal that display end passes back in the first Preset Time the transmitter unit of audio, video data with described pretreatment unit with described the first control unit, wherein, described audio, video data comprises pretreated video data to be transmitted and voice data to be transmitted;
With described the first control signal Transmit-Receive Unit wireless connections and for the second control signal Transmit-Receive Unit that has the off signal that no marks and display end pass back of receiving video signals;
Be connected and whether have for detection in the second Preset Time the second control unit of vision signal sign with described the second control signal Transmit-Receive Unit;
Be connected respectively and receive when vision signal sign being detected and do not receive the off signal that display end passes back in the second Preset Time the receiving element of described audio, video data with described the second control unit with described transmitter unit wireless connections;
Be connected and produce when human body signal not detected in the 3rd Preset Time the power subsystem of off signal with described the second control unit;
Be connected respectively and show when human body signal being detected in the 3rd Preset Time the display unit of described audio, video data with described power subsystem with described receiving element.
In system of the present invention, described pretreatment unit comprises:
For obtain the difference between present frame and consecutive frame by multi-frame difference detecting moving object method when video data to be transmitted exists vision signal, and according to the video data characteristics detection sub-unit of the classification of described difference judgement present frame;
Be connected and carry out for treat transmitting video data according to the classification of described present frame the video data classified compression subelement of classified compression transmission with described video data characteristics detection sub-unit.
In system of the present invention, whether described the first control unit also carries out preliminary treatment for controlling described pretreatment unit.
In system of the present invention, described the first control signal Transmit-Receive Unit is also for sending the order that has or not vision signal sign.
In system of the present invention, described system also comprises:
Be connected with described power subsystem and for carrying out the infrared human body detecting unit of human body infrared detection within the scope of the predeterminable range at display place peripheral position;
Be connected with described power subsystem and for setting the delay unit of default delay time.
Implement technical scheme of the present invention, by treating transmitting video data, carry out preliminary treatment, and by detecting automatic shutdown and the start that realizes transmitting terminal, receiving terminal and display end that have or not of vision signal and human body signal, reduced the bandwidth taking in transmitting procedure, and shortened launch time and time of reception, effectively reduced the power consumption of high-definition video wireless transmission system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is for realizing the structural representation of the high-definition video wireless transmission system of low-power consumption according to the present invention;
Fig. 2 is for realizing the flow chart of the HD video radio transmitting method embodiment mono-of low-power consumption according to the present invention;
Fig. 3 is for realizing the flow chart of step S1 embodiment bis-in the HD video radio transmitting method of low-power consumption according to the present invention;
Fig. 4 is for realizing the flow chart of step S2 embodiment tri-in the HD video radio transmitting method of low-power consumption according to the present invention;
Fig. 5 is for realizing the flow chart of step S3 embodiment tetra-in the HD video radio transmitting method of low-power consumption according to the present invention;
Fig. 6 is for realizing the flow chart of step S4 embodiment five in the HD video radio transmitting method of low-power consumption according to 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.
Refer to Fig. 1, for realize the structural representation of the system of low-power consumption HD video wireless transmission according to the present invention.As shown in Figure 1, this system comprises pretreatment unit 1, the the first control signal Transmit-Receive Unit 2 being connected with pretreatment unit 1, the first control unit 3 being connected with the first control signal Transmit-Receive Unit 2, the transmitter unit 4 being connected with pretreatment unit 1 with the first control unit 3 respectively, the second control signal Transmit-Receive Unit 5 with the first control signal Transmit-Receive Unit 2 wireless connections, the second control unit 6 being connected with the second control signal Transmit-Receive Unit 5, the receiving element 7 being connected with the second control unit 6 with transmitter unit 4 wireless connections respectively, the power subsystem 8 being connected with the second control unit 6, the infrared human body detecting unit 9 being connected with power subsystem 8 respectively and delay unit 10, and the display unit 11 being connected with power subsystem 8 with receiving element 7 respectively.
Wherein, this pretreatment unit 1 comprises video data characteristics detection sub-unit 101 and the video data classified compression subelement 102 being connected with this video data characteristics detection sub-unit 101.Illustrate the effect of various piece below:
Pretreatment unit 1, carries out preliminary treatment for treating transmitting video data.
The first control signal Transmit-Receive Unit 2, the off signal of passing back for receiving pretreated video data to be transmitted and display end, in an embodiment of the present invention, the first control signal Transmit-Receive Unit 2 is in running order all the time.
Whether the first control unit 3, have vision signal sign for detect pretreated video data to be transmitted in the first Preset Time, and in an embodiment of the present invention, the first control unit 3 is in running order all the time.
Transmitter unit 4, for the first control unit 3, in the first Preset Time, detect and when vision signal sign and the first control signal Transmit-Receive Unit 2 do not receive the off signal that display end passes back, send audio, video data, wherein, this audio, video data comprises pretreated video data to be transmitted and voice data to be transmitted, in an embodiment of the present invention, the open and close state of transmitter unit 4 work can be controlled, and can be manual control, can be also automatic control.
The second control signal Transmit-Receive Unit 5, for the off signal that has no marks and display end to pass back of receiving video signals, in an embodiment of the present invention, the second control signal Transmit-Receive Unit 5 is in running order all the time.
The second control unit 6, for detect whether there is vision signal sign in the second Preset Time, in an embodiment of the present invention, the second control unit 6 is in running order all the time.
Receiving element 7, for the second control unit 6, in the second Preset Time, detect and when vision signal sign and the second control signal Transmit-Receive Unit 5 do not receive the off signal that display end passes back, receive this audio, video data, in an embodiment of the present invention, the open and close state of receiving element 7 work can be controlled, can be manual control, can be also automatic control.
Power subsystem 8, produces off signal when human body signal not detected in the 3rd Preset Time.
Infrared human body detecting unit 9, for carry out human body infrared detection within the scope of the predeterminable range of display place peripheral position, in an embodiment of the present invention, this predeterminable range scope can be set voluntarily according to user's actual demand, those skilled in the art should understand, and repeats no more here.
Delay unit 10, for setting default delay time, the set basis user's of this default delay time demand is set voluntarily, and those skilled in the art should understand, and repeats no more here.
Display unit 11, shows this audio, video data while human body signal being detected for infrared human body detecting unit 9 in the 3rd Preset Time, and in an embodiment of the present invention, display unit 11 is video circuit, voicefrequency circuit etc.
Video data characteristics detection sub-unit 101, for obtain the difference between present frame and consecutive frame by multi-frame difference detecting moving object method when video data to be transmitted exists vision signal, and according to the classification of this difference judgement present frame.
Video data classified compression subelement 102, carries out classified compression transmission for treating transmitting video data according to the classification of this present frame.
Preferably, the first control unit 3, also for controlling this pretreatment unit 1, whether carry out preliminary treatment, should be noted that, if display end is passed off signal back, the first control signal Transmit-Receive Unit 2 receives this off signal, notifies the first control unit 3 to control this pretreatment unit 1 and stops preliminary treatment, reaches further energy-conservation effect.
Preferably, the first control signal Transmit-Receive Unit 2, also for sending the order that has or not vision signal sign.
Refer to Fig. 2, for realize the flow chart of the HD video radio transmitting method embodiment mono-of low-power consumption according to the present invention, the detailed process of said method as shown in Figure 2, the method starts from step S1, treat transmitting video data and carry out preliminary treatment, in an embodiment of the present invention, preprocessing process is treated the transmission means that transmitting video data adopts Lossless Compression, without any the loss of video data, effectively reduce the bandwidth taking in transmitting procedure and shorten launch time and time of reception.
Subsequently, at next step S2, the first control unit detects and when pretreated video data to be transmitted has vision signal sign and the first control signal Transmit-Receive Unit not to receive the off signal that display end passes back, sends audio, video data in the first Preset Time.
Subsequently, at next step S3, the first control unit detects and when vision signal sign and the second control signal Transmit-Receive Unit do not receive the off signal that display end passes back, receives audio, video data in the second Preset Time.
Finally, the method ends at step S4, and infrared human body detecting unit shows audio, video data while human body signal being detected in the 3rd Preset Time.
Refer to Fig. 3, for realize the flow chart of step S1 embodiment bis-in the HD video radio transmitting method of low-power consumption according to the present invention, the detailed process of said method as shown in Figure 3, this step S1 starts from step S11, whether the video data to be transmitted of judgement input there is vision signal, if, perform step S12, if not, repeating step S11, in an embodiment of the present invention, if the video data to be transmitted of input is analog video signal, there is video AD chip in input, read the correlating markings position in this chip register, can know and have or not vision signal input, if the video data to be transmitted of input is digital video signal, there are two kinds of situations, if countless certificates and row field signal, can directly read the vision signal of input, and judge whether this vision signal is 0, if 0, no signal, if no signal, but input provides blue screen or other picture, this kind of situation being regarded as to frozen frozen mass processes.
Subsequently, at next step S12, by multi-frame difference detecting moving object method, obtain the difference between present frame and consecutive frame.
Subsequently, at next step S13, judge whether this difference is greater than preset value, if so, this present frame is motion frame, performs step S14, and if not, this present frame is frozen frozen mass, transmits static sign.
In an embodiment of the present invention, take space one frame realizes the concrete steps of multi-frame difference detecting moving object method as example explanation:
First, in video sequence, obtain three frame adjacent video images, this three frame video image is used respectively I
k-1, I
k, I
k+1represent, according to following two formula, calculate respectively respectively the absolute difference gray level image of adjacent two frame video images, this absolute difference gray level image is used respectively IZ
(k, k-1), IZ
(k+1, k)represent, T is the preset value comparing with error image binaryzation, and the setting of this preset value obtains by experiment, and those skilled in the art should understand, repeat no more here,
Wherein, k is greater than 1 natural number, and i, j are respectively abscissa and the ordinate of a two field picture;
Then, according to two formula, judging whether present frame is motion frame, if the difference of adjacent two frame video images is more than or equal to T, is motion frame, and extracts moving region data, if the difference of adjacent two frame video images is less than T, is frozen frozen mass;
Finally, according to following formula, carry out and computing, to extract IZ
(k, k-1), IZ
(k+1, k)common factor, obtain the movement destination image IZ of present frame
k;
Wherein, IZ
kfor moving target bianry image, k is greater than 1 natural number, and i, j are respectively abscissa and the ordinate of a two field picture.
Finally, this step S1 ends at step S14, judges whether this motion frame motion is violent, if so, transmit whole frame video data, if not, transmitting moving area data, in an embodiment of the present invention, for light exercise frame, because amount of exercise is little, so transmitting moving area data only, for strenuous exercise's frame, for guaranteeing HD video quality, need the whole frame video data of transmission.
Refer to Fig. 4, for realize the flow chart of step S2 embodiment tri-in the HD video radio transmitting method of low-power consumption according to the present invention, the detailed process of said method as shown in Figure 4, this step S2 starts from step S21, judges whether the first control unit detects pretreated video data to be transmitted and have vision signal sign and the first control signal Transmit-Receive Unit whether to receive the off signal that display end is passed back in the first Preset Time.
Subsequently, at next step S22, if the first control unit detects vision signal sign and the first control signal Transmit-Receive Unit does not receive the off signal that display end is passed back, send audio, video data, and send the order that has vision signal sign in the first control signal Transmit-Receive Unit.
Or, subsequently, at next step S23, if the first control unit has not detected vision signal sign, do not send audio, video data, and send the order without video marker in the first control signal Transmit-Receive Unit.
Or, subsequently, at next step S24, if the first control signal Transmit-Receive Unit receives the off signal that display end is passed back, do not send audio, video data.
Refer to Fig. 5, for realize the flow chart of step S3 embodiment tetra-in the HD video radio transmitting method of low-power consumption according to the present invention, the detailed process of said method as shown in Figure 5, this step S3 starts from step S31, judges whether the second control unit detects vision signal sign in the second Preset Time and whether the second control signal Transmit-Receive Unit receives the off signal that display end is passed back.
Subsequently, at next step S32, if the second control unit detects vision signal sign in the second Preset Time and the second control signal Transmit-Receive Unit does not receive the off signal that display end is passed back, receive audio, video data.
Or subsequently, at next step S33, if the second control unit has not detected vision signal sign in the second Preset Time, or the second control signal Transmit-Receive Unit receives the off signal that display end is passed back, does not receive audio, video data.
Refer to Fig. 6, for realize the flow chart of step S4 embodiment five in the HD video radio transmitting method of low-power consumption according to the present invention, the detailed process of said method as shown in Figure 6, this step S4 starts from step S41, judge that whether infrared human body detecting unit detects human body signal in the 3rd Preset Time, if so, performs step S42, if not, perform step S43.
S42. show audio, video data, this step S4 finishes.
S43. set default delay time.
S44. judge whether infrared human body detecting unit detects human body signal in default delay time, if so, performs step S45, if not, performs step S46.
S45. restart to detect, and cancel this default delay time.
S46. do not show audio, video data, and send off signal to transmitting terminal and receiving terminal.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (5)
1. a HD video radio transmitting method of realizing low-power consumption, is characterized in that, said method comprising the steps of:
S1. treat transmitting video data and carry out preliminary treatment;
S2. in the first Preset Time, detect and when pretreated video data to be transmitted has vision signal sign and do not receive the off signal that display end passes back, send audio, video data;
When vision signal sign S3. being detected and not receiving the off signal that display end passes back in the second Preset Time, receive audio, video data;
While S4. human body signal being detected in the 3rd Preset Time, show audio, video data.
2. method according to claim 1, is characterized in that, described step S1 specifically comprises:
S11. whether the video data to be transmitted of judgement input there is vision signal, if so, performs step S12, if not, and repeating step S11;
S12. by multi-frame difference detecting moving object method, obtain the difference between present frame and consecutive frame, and judge whether described difference is greater than preset value, if, described present frame is motion frame, performs step S13, if not, described present frame is frozen frozen mass, transmits static sign;
S13. judge whether the motion of described motion frame is violent, if so, transmits whole frame video data, if not, transmitting moving area data.
3. method according to claim 2, is characterized in that, in described step S2, specifically comprises:
S21. judge that pretreated video data to be transmitted in the first Preset Time, whether being detected has vision signal sign and whether receive the off signal that display end is passed back;
If vision signal sign S22. detected and do not receive the off signal that display end is passed back, send audio, video data, and send the order that has vision signal sign;
If vision signal sign S23. do not detected in the first Preset Time, do not send audio, video data, and send the order of ignoring frequency marker;
If S24. receive the off signal that display end is passed back, do not send audio, video data.
4. method according to claim 3, is characterized in that, described step S3 specifically comprises:
S31. judge and vision signal sign in the second Preset Time, whether detected and whether receive the off signal that display end is passed back;
If vision signal sign S32. detected and do not receive the off signal that display end is passed back in the second Preset Time, receiving audio, video data;
If vision signal sign S33. do not detected in the second Preset Time, or, receive the off signal that display end is passed back, do not receive audio, video data.
5. method according to claim 4, is characterized in that, described step S4 specifically comprises:
S41. judge in the 3rd Preset Time human body signal whether detected, if so, perform step S42, if not, perform step S43;
S42. show audio, video data;
S43. judge in default delay time human body signal whether detected, if so, perform step S44, if not, perform step S45;
S44. restart to detect, and cancel this default delay time;
S45. do not show audio, video data, and send off signal to transmitting terminal and receiving terminal.
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| CN201947402U (en) * | 2011-01-19 | 2011-08-24 | 深圳市视晶无线技术有限公司 | High-definition video wireless transmission system realizing low power consumption |
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| US20070152993A1 (en) * | 2005-12-29 | 2007-07-05 | Intel Corporation | Method, display, graphics system and computer system for power efficient displays |
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| CN101091388A (en) * | 2004-12-28 | 2007-12-19 | 松下电器产业株式会社 | Mobile type digital broadcast receiving apparatus and receiving method |
| CN101521802A (en) * | 2008-02-25 | 2009-09-02 | 王兴忠 | Short distance wireless digital video monitoring system |
| CN101873447A (en) * | 2009-04-21 | 2010-10-27 | 深圳富泰宏精密工业有限公司 | Electronic device and power-saving method thereof of watching television |
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