CN101998075A - Receiver and method for adjusting intensity of adjustable equalizer of receiver - Google Patents
Receiver and method for adjusting intensity of adjustable equalizer of receiver Download PDFInfo
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- CN101998075A CN101998075A CN2009101657999A CN200910165799A CN101998075A CN 101998075 A CN101998075 A CN 101998075A CN 2009101657999 A CN2009101657999 A CN 2009101657999A CN 200910165799 A CN200910165799 A CN 200910165799A CN 101998075 A CN101998075 A CN 101998075A
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Abstract
The invention relates to a receiver and a method for adjusting the intensity of an adjustable equalizer of the receiver. The receiver comprises the adjustable equalizer, an intensity detecting unit and an adjusting unit, wherein the adjustable equalizer is used for receiving a signal and outputting an equalized signal; the intensity detecting unit is coupled with the adjustable equalizer, and used for at least detecting the intensity of the equalized signal in a first period of time to obtain a first intensity signal, and at least detecting the intensity of the equalized signal in a second period of time to obtain a second intensity signal; and the adjusting unit is coupled with the intensity detecting unit and the adjustable equalizer, and used for adjusting the intensity of the adjustable equalizer according to the first intensity signal and the second intensity signal.
Description
Technical field
The relevant a kind of receiver of the present invention refers to a kind ofly can adjust the receiver of adjustable equalizer automatically especially, and the method for intensity of adjusting the adjustable equalizer of this receiver.
Background technology
Please refer to Fig. 1, Fig. 1 is the schematic diagram that existing serial links the data transmit-receive assembly 100 of (serial link).As shown in Figure 1, data transmit-receive assembly 100 includes a conveyer 110, a transmission channel 120 and a receiver 130, and wherein receiver 130 includes an equalizer 132.In the operation of data transmit-receive assembly 100, at first conveyer 110 receives a signal V
InAnd with signal V
InAfter making signal processing, the signal after handling is sent in the receiver 130 via transmission channel 120, afterwards, receiver 130 deals with to produce an output signal V received signal again
OutYet, because the similar in fact low pass filter of transmission channel 120, therefore, signal is through transmission channel 120 time, its radio-frequency head branch produces amplitude (intensity) decay as shown in Figure 2, thereby cause between symbol unit and disturb (Inter-symbol Interference, ISI) and shake (jitter) phenomenon.
In order to solve above-mentioned signal HFS in the problem through decaying after the transmission channel 120, general receiver 130 can use equalizers 132 compensate the loss of received signal at HFS.Please refer to Fig. 3, Fig. 3 is the schematic diagram of the frequency response of equalizer 132.As shown in Figure 3, curve 301,302,303,304,305 is respectively the frequency response that equalizer 132 can be set, and curve 301 representatives is that equalizer 132 has maximum intensity, that is equalizer 132 can carry out maximum compensation to received high-frequency signal; And curve 305 representatives is that equalizer 132 has minimum intensity, that is equalizer 132 can carry out minimum compensation to received high-frequency signal.In addition, in general, the intensity of equalizer 132 is pre-set, that is the designer can judge transmission channel 120 earlier can produce to the HFS of signal haply for how many decay, decides to have the equalizer 132 of constant intensity.Yet, the decay of 120 pairs of high-frequency signals of transmission channel is not what fix, but can be according to the pattern of transmission channel 120 or length and change, therefore, equalizer 132 in the prior receivers 130 also can't be really carries out optimal compensation to the HFS of signal, therefore, interference and jitter phenomenon still can take place between symbol unit.
Summary of the invention
Therefore, the object of the present invention is to provide and a kind ofly can adjust the receiver of adjustable equalizer automatically, and the method for intensity of adjusting the adjustable equalizer of this receiver, to solve the above problems.
Provide a kind of receiver according to one aspect of the present invention, it includes an adjustable equalizer, an intensity detection unit and an adjustment unit.This adjustable equalizer is used for receiving a signal and exports a balanced back signal; This intensity detection unit is coupled to this adjustable equalizer, and be used for detecting at least signal after this equilibrium in the intensity of a very first time section obtaining one first strength signal, and detect at least signal after this equilibrium in the intensity of one second time section to obtain one second strength signal; This adjustment unit is coupled to this intensity detection unit and this adjustable equalizer, is used for adjusting according to this first strength signal and this second strength signal the intensity of this adjustable equalizer.
The method of intensity of one adjustable equalizer of a kind of adjustment one receiver is provided on the other hand according to the present invention, and this method includes: uses this adjustable equalizer to come a signal is carried out balanced operation to produce equilibrium signal afterwards; At least detect signal after this equilibrium in the intensity of a very first time section obtaining one first strength signal, and detect at least signal after this equilibrium in the intensity of one second time section to obtain one second strength signal; And the intensity of adjusting this adjustable equalizer according to this first strength signal and this second strength signal.
According to the receiver of the present invention and the method for intensity of adjusting the adjustable equalizer of receiver, adjustable equalizer can automatically be adjusted to optimal intensity, makes balanced back signal to have and disturbs between minimum symbol unit and minimum jitter phenomenon.
Description of drawings
Fig. 1 is the schematic diagram of the data transmit-receive assembly of existing serial binding.
Fig. 2 produces the schematic diagram of amplitude (intensity) decay at HFS through transmission channel the time for signal.
Fig. 3 is the schematic diagram of a plurality of frequency responses of equalizer.
Fig. 4 is the schematic diagram according to the receiver of one embodiment of the invention.
Fig. 5 is the schematic diagram of high-definition multimedia form.
Fig. 6 is a video signal through after the transmission channel, the schematic diagram of the video data of video signal and the intensity of gap data.
Fig. 7 is the schematic diagram that determines the method for transition number of times
Fig. 8 be the intensity detection unit in video signal signal strength signal intensity after the very first time zone detection equilibrium and after the very first time zone detection equilibrium schematic diagram of video signal signal strength signal intensity.
Fig. 9 realizes the schematic diagram of the subelement of receiver shown in Figure 4 for using digital element.
Figure 10 realizes the schematic diagram of receiver shown in Figure 4 for using analog element.
Figure 11 is the flow chart according to the method for the intensity of an adjustable equalizer of adjustment one receiver of one embodiment of the invention.
Embodiment
Please refer to Fig. 4, Fig. 4 is the schematic diagram according to the receiver 400 of one embodiment of the invention.As shown in Figure 4, receiver 400 includes an adjustable equalizer 410, an intensity detection unit 420, an adjustment unit 430, a transition (transition) detecting unit 440 and a control signal generating unit 450, and wherein intensity detection unit 420 includes a wave amplitude detector (envelope detector) 422, two switches 423,424, one first strength signal generation unit 426 and one second strength signal generation unit 428.In addition, receiver 400 is receivers of a string joining line, and be a HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface, HDMI) receiver or a digital video interface (Digital Visual Interface, DVI) receiver.
In the operation of receiver 400, at first, adjustable equalizer 410 can receive a video signal V earlier
InAnd to video signal V
InCarry out equalization operation to obtain a balanced back video signal data V
In_eq, video signal V wherein
InHave high-definition multimedia (HDMI) form or coefficient word video signal (DVI) form.Please refer to Fig. 5, Fig. 5 is the schematic diagram of high-definition multimedia form, and as shown in Figure 5, a picture frame 500 includes video data and gap data, and wherein video data is the data that correspond to the display screen viewing area, includes the data of pixel value or the like; Gap data is a control code then, corresponds to the not visible zone of display screen.In addition, in the high-definition multimedia form, video data is to use minimized transition differential signal (Transition Minimized Differential Signaling, TMDS) form is encoded, the characteristic of this coding is to make signal can have fewer transition number of times, thereby shows more low-frequency component in signal.Therefore, as video signal V
In(video signal V when transmission
InBe according to picture frame 500 (line-by-line) transmission line by line), with delegation 510 is example, its signal is shown in Figure 6 haply, the part transition number of times of video data is less, signal presents and has more low-frequency component, and the part of gap data is not used TMDS form coding, and the transition number of times is more, and signal presents and has more radio-frequency component.In addition, because the relation of channel attenuation, under the compensation of not equalized device, video data shown in Figure 6 partly has bigger amplitude (intensity) on average, and gap data partly then has less amplitude (intensity) on average.
Then, wave amplitude detector 422 detects balanced back video signal data V
In_eqAnd produce a wave amplitude signal V
Env, wave amplitude signal V
EnvCan be considered as balanced back video signal V
In_eqThe intensity level of envelope, and wave amplitude signal V
EnvBe envelope 610 shown in Figure 6 haply.Simultaneously, transition detecting unit 440 detects video signal V
InThe transition number of times and notify control signal generating unit 450.For instance, the transition number of times is defined as video signal V
InIn the set time (for example transmitting the time of 10 bit data), has what transitions (transition) number of times (that is, the number of times that the signal high-low level switches).Please refer to Fig. 7, Fig. 7 is the schematic diagram that determines the method for transition number of times, as shown in Figure 7, and 440 couples of balanced back video signal V of transition detecting unit
In_eqSampling, and produce sampled signal (that is, 111100011... shown in Figure 7), and judge in 10 time, to have what transition number of times (example shown in Figure 7 has 5 transition number of times in 10 time) according to sampled signal.
In addition, in the schematic diagram of the receiver 400 that Fig. 4 painted, transition detecting unit 440 is to detect video signal V
InThe transition number of times, yet in other embodiments of the invention, transition detecting unit 440 also can detect balanced back video signal V
In_eq, or other and video signal V
InHave identical in fact signal and produce the transition number of times, the variation in these designs all should be under the jurisdiction of category of the present invention.
Then, as present video signal V
In(or balanced back video signal V
In_eq) transition number of times during less than one first critical numerical value, then this phenomenon is represented present video signal V
In(or balanced back video signal V
In_eq) should be to transmit video data with more low frequency composition, at this moment, control signal generating unit 450 is used one first control signal V
Con1 Come control switch 423 for the state of conducting (this moment, switch 424 was nonconducting state), make the signal strength signal intensity generation unit 426 of winning to receive wave amplitude signal V
EnvAnd produce one first strength signal V according to this
1, the first strength signal V wherein
1Be used for representing wave amplitude signal V
EnvValue (that is balanced back video signal V
In_eqSignal amplitude when transmitting video data); And as present video signal V
In(or balanced back video signal V
In_eq) transition number of times during greater than one second critical numerical value, then this phenomenon is represented present video signal V
In(or balanced back video signal V
In_eq) should be to transmit gap data with more radio-frequency component, at this moment, control signal generating unit 450 is used one second control signal V
Con2Come control switch 424 for the state of conducting (this moment, switch 423 was nonconducting state), make secondary signal intensity generation unit 428 can receive wave amplitude signal V
EnvAnd produce one second strength signal V
2, the first strength signal V wherein
2Be used for representing wave amplitude signal V
EnvValue (that is balanced back video signal V
In_eqSignal amplitude when transmitting gap data).
For instance, suppose in one embodiment of the invention that the transition number of times was defined as in the time of transmission 10 bit data, video signal V
InHave what transition number of times.First critical numerical value can be made as: have 5 transition number of times in continuous 10 positions; And second critical numerical value can be made as: have 7 transition number of times in continuous 10 positions.That is, as detected video signal V
InFor in continuous 10 positions, having N transition number of times, if present video signal V is then represented in N＜5
InTransmitting video data; If present video signal V is then represented in N＞7
InTransmitting gap data.
In addition, receive wave amplitude signal V at the first signal strength signal intensity generation unit 426
EnvAnd produce the first strength signal V
1Operation in, on the Yu Shizuo, the first signal strength signal intensity generation unit 426 can continue to receive wave amplitude signal V
EnvA period of time or multistage time, and go out wave amplitude signal V with numerical calculation
EnvMean value or analog filtering produce wave amplitude signal V
EnvRolling average (moving average), with as the first strength signal V
1Specifically, please refer to Fig. 8, suppose at time t
1The time, judge the transition number of times less than one first critical numerical value (that is, this moment video signal V
InTransmitting video data), then control signal generating unit 450 is used the first control signal V
Con1 Come control switch 423 to be the state of conducting, and the time of switch 423 conductings is T
1, therefore, the first signal strength signal intensity generation unit 426 is in the time section T
1The interior reception wave amplitude signal V that continues
Env, and with received wave amplitude signal V
EnvMake an average computation to produce the first strength signal V
1Be noted that in the foregoing description, the first signal strength signal intensity generation unit 426 is in the time section T
1The interior wave amplitude signal V that receives
Env, and produce the first strength signal V according to this
1Yet,, in other embodiments of the invention, the first signal strength signal intensity generation unit 426 can receive and correspond to video signal V
InMultirow (for example adjacent 8 row, wherein 1 row be similar be shown in Figure 5 510) wave amplitude signal V
Env, that is the first signal strength signal intensity generation unit 426 is to receive wave amplitude signal V in a plurality of discontinuous time sections
Env(these a plurality of discontinuous time sections are the video datas that correspond to different rows respectively), and with received wave amplitude signal V
EnvMake an average computation to produce the first strength signal V
1, the variation in these designs all should be under the jurisdiction of category of the present invention.
Similarly, receive wave amplitude signal V at secondary signal intensity generation unit 428
EnvAnd produce the second strength signal V
2Operation in, on the Yu Shizuo, secondary signal intensity generation unit 428 can continue to receive wave amplitude signal V
EnvA period of time or multistage time, and go out wave amplitude signal V with numerical calculation
EnvMean value or analog filtering produce wave amplitude signal V
EnvRolling average (moving average), with as the second strength signal V
2Specifically, please refer to Fig. 8, suppose at time t
2The time, judge the transition number of times greater than one second critical numerical value (that is this moment video signal V
InTransmitting gap data), then control signal generating unit 450 is used the second control signal V
Con2 Come control switch 424 to be the state of conducting, and the time of switch 424 conductings is T
2, therefore, the first signal strength signal intensity generation unit 428 is in the time section T
2The interior reception wave amplitude signal V that continues
Env, and with received wave amplitude signal V
EnvMake an average computation to produce the second strength signal V
2Be noted that in the foregoing description, secondary signal intensity generation unit 428 is in the time section T
2The interior wave amplitude signal V that receives
Env, and produce the second strength signal V according to this
2Yet,, in other embodiments of the invention, secondary signal intensity generation unit 428 can receive and correspond to video signal V
InThe wave amplitude signal V of multirow (for example adjacent 2 row, wherein 1 row is similarly to be shown in Figure 5 510)
Env, that is secondary signal intensity generation unit 428 is to receive wave amplitude signal V in a plurality of discontinuous time sections
Env(these a plurality of discontinuous time sections are the gap data that correspond to different rows respectively), and with received wave amplitude signal V
EnvMake an average computation to produce the second strength signal V
2, the variation in these designs all should be under the jurisdiction of category of the present invention.
In addition, be noted that the inner member of above-mentioned relevant intensity detection unit 420 and execution mode only are example explanation, in other embodiments of the invention, as long as intensity detection unit 420 can detect balanced back video signal V
In_eqIn the intensity of video data and gap data with as the first strength signal V
1And the second strength signal V
2, the execution mode of intensity detection unit 420 can have multiple choices.
Afterwards, adjustment unit 430 is according to the first strength signal V
1And the second strength signal V
2Produce one and adjust signal V
Adj, and utilize and adjust signal V
AdjAdjust the intensity of adjustable equalizer 410.
In addition, about the details operation of adjustment unit 430, in one embodiment of the invention, adjustment unit 430 can compare the first strength signal V
1And the second strength signal V
2Size judge the intensity that will increase or downgrade adjustable equalizer 410, the first strength signal V relatively wherein
1And the second strength signal V
2The method of size can be the first strength signal V relatively
1And the second strength signal V
2Difference (difference), or the first strength signal V relatively
1And the second strength signal V
2Ratio (ratio) ... or the like.For instance, if the first strength signal V
1Greater than the second strength signal V
2, then represent balanced back video signal V
In_eqIn the amplitude (intensity) of video data greater than the amplitude (intensity) of gap data, that is, 410 couples of video signal V of adjustable equalizer
InHigh frequency compensation not enough, therefore, adjustment unit 430 utilization is adjusted signal V
AdjIncrease the intensity of adjustable equalizer 410, for example the intensity with adjustable equalizer 410 is increased to curve 302 by curve shown in Figure 3 303.Otherwise, if the first strength signal V
1Less than the second strength signal V
2, then represent balanced back video signal V
In_eqIn the amplitude (intensity) of video data less than the amplitude (intensity) of gap data, that is, 410 couples of video signal V of adjustable equalizer
InHigh frequency compensation too much (overcompensation), therefore, adjustment unit 430 utilizes adjusts signal V
AdjDowngrade the intensity of adjustable equalizer 410, for example the intensity with adjustable equalizer 410 downgrades curve 304 by curve shown in Figure 3 303.
In addition, details operation about adjustment unit 430 continues ceaselessly to adjust the intensity of adjustable equalizer 410 for fear of adjustment unit 430, and makes the user have uncomfortable situation when watching image data, in one embodiment of the invention, as the first strength signal V
1Greater than the second strength signal V
2And the first strength signal V
1With this second strength signal V
2Difference during greater than one first critical value, adjustment unit 430 increases the intensity of adjustable equalizer 410; As the first strength signal V
1Greater than the second strength signal V
2And the first strength signal V
1With this second strength signal V
2Difference when being not more than this first critical value, adjustment unit 430 is not adjusted the intensity of adjustable equalizer 410; As the first strength signal V
1Less than the second strength signal V
2And the first strength signal V
1With the second strength signal V
2Difference during greater than one second critical value, adjustment unit 430 downgrades the intensity of adjustable equalizer 410; And as the first strength signal V
1Less than the second strength signal V
2And the first strength signal V
1With the second strength signal V
2Difference when being not more than this second critical value, adjustment unit 430 is not adjusted the intensity of adjustable equalizer 410.In simple terms, as the first strength signal V
1With the second strength signal V
2Difference within a particular range time (that is, balanced back video signal V
In_eqThe amplitude of middle video data and the amplitude difference of gap data are in permissible range), adjustment unit 430 will not adjusted the intensity of adjustable equalizer 410 to avoid causing user's discomfort.
In addition, about the operation of the details of adjustment unit 430, continue ceaselessly to adjust the intensity of adjustable equalizer 410 and cause user's discomfort for fear of adjustment unit 430, in another embodiment of the present invention, as the first strength signal V
1Greater than the second strength signal V
2The time, adjustment unit 430 increases the intensity of adjustable equalizer 410 up to the first strength signal V
1Less than the second strength signal V
2, afterwards with regard to the function of temporary close adjustment unit 430; And as the first strength signal V
1Less than the second strength signal V
2The time, adjustment unit 430 downgrades the intensity of adjustable equalizer 410 up to the first strength signal V
1Greater than the second strength signal V
2, afterwards with regard to the function of temporary close adjustment unit 430.For instance, the intensity of supposing present adjustable equalizer 410 is curve 304 shown in Figure 3, and the first strength signal V
1Greater than the second strength signal V
2(representing the loss of the undercapacity of present adjustable equalizer 410 with the compensation high-frequency signal), then adjustment unit 430 increases the intensity of adjustable equalizer 410 to curve 303.Then, adjustment unit 430 is judged when the intensity of adjustable equalizer 410 is curve 303 again, the first strength signal V
1With the second strength signal V
2Difference, if the first strength signal V
1Still greater than the second strength signal V
2, then adjustment unit 430 increases the intensity of adjustable equalizer 410 to curve 302; Otherwise, if the first strength signal V
1Less than the second strength signal V
2The time, adjustment unit 430 just temporarily stop to adjust adjustable equalizer 410 intensity (that is, the strength maintenance of adjustable equalizer 410 is at curve 303), when a certain condition is set up after by the time (for example, the user closes after the receiver 400, when receiver 400 is used in start again again) more adjustable equalizer 410 is carried out the intensity adjustment.
Please refer to Fig. 9, Fig. 9 realizes the schematic diagram of the subelement of receiver shown in Figure 4 400 for using digital element.As shown in Figure 9, receiver 900 includes an adjustable equalizer 910, an intensity detection unit 920, an adjustment unit 940, a transition detecting unit 950 and a control signal generating unit 960, wherein intensity detection unit 920 includes a wave amplitude detector (envelope detector) 930, one analog-digital converter 922, two switches 923,924, two accumulators 925,926, two dividers 927,928, and wave amplitude detector 930 includes a voltage multiplier 932, a low pass filter 934 and an amplifier 936.
In the operation of receiver 900, at first, adjustable equalizer 910 receives a video signal V
InTo produce a balanced back video signal V
In_eq, afterwards, the voltage multiplier 932 in the wave amplitude detector 930, low pass filter 934 and amplifier 936 carry out operations such as a square calculating, low-pass filtering and amplification in regular turn to produce a wave amplitude signal V to received signal
EnvAfterwards, 922 pairs of wave amplitude signals of analog-digital converter V
EnvCarry out the analog digital conversion operations to produce a digital wave amplitude signal V
Env_dig
In addition, simultaneously, transition detecting unit 950 detects video signal V
In(or balanced back video signal V
In_eq) the transition number of times and notify control signal generating unit 960.Then, as present video signal V
In(or balanced back video signal V
In_eq) transition number of times during less than one first critical numerical value, then this phenomenon is represented present video signal V
In(or balanced back video signal V
In_eq) should be to transmit video data with more low-frequency component, at this moment, control signal generating unit 960 is used the first control signal V
Con1Come control switch 923 for the state of conducting (this moment, switch 924 was nonconducting state), make that accumulator 925 can be to digital wave amplitude signal V
Env_digThe operation that adds up, divider 927 carries out division arithmetic to obtain the first strength signal V to the output of accumulator 925 more afterwards
1, in other words, accumulator 925 and divider 927 promptly are to calculate digital wave amplitude signal V
Env_digMean value.In addition, as present video signal V
In(or balanced back video signal V
In_eq) transition number of times during greater than one second critical numerical value, then this phenomenon is represented present video signal V
In(or balanced back video signal V
In_eq) should be to transmit gap data with more radio-frequency component, at this moment, control signal generating unit 960 is used the second control signal V
Con2 Come control switch 924 for the state of conducting (this moment, switch 923 was nonconducting state), make that accumulator 926 can be to digital wave amplitude signal V
Env_digThe operation that adds up, divider 928 carries out division arithmetic to obtain the second strength signal V to the output of accumulator 926 more afterwards
2, in other words, accumulator 926 and divider 928 promptly are to calculate digital wave amplitude signal V
Env_digMean value.
Afterwards, adjustment unit 940 is according to the first strength signal V
1And the second strength signal V
2Produce one and adjust signal V
Adj, and utilize and adjust signal V
AdjAdjust the intensity of adjustable equalizer 910.In addition, receiver 900 is only for utilizing digital form to realize an embodiment of receiver 400 shown in Figure 4, therefore, it is relevant implement to change and the execution mode of adjustment unit 940 with in above-mentioned narration, mention about receiver 400, therefore do not repeat them here.
Please refer to Figure 10, Figure 10 realizes the schematic diagram of receiver shown in Figure 4 400 for using analog element.As shown in figure 10, receiver 1000 includes an adjustable equalizer 1010, an intensity detection unit 1020, an adjustment unit 1040, a transition detecting unit 1050 and a control signal generating unit 1060, wherein intensity detection unit 1020 includes a wave amplitude detector (envelope detector) 1030, two switches 1023,1024, two low pass filters 1026,1028, and wave amplitude detector 1030 includes a voltage multiplier 1032, a low pass filter 1034 and an amplifier 1036.
Please refer to Figure 11, Figure 11 is that it is corresponding to receiver shown in Figure 4 400 according to the flow chart of the method for the intensity of an adjustable equalizer of adjustment one receiver of one embodiment of the invention, and the step of this method is described below:
Step 1100: beginning.
Step 1110: use this adjustable equalizer to come a signal is carried out balanced operation to produce a balanced back signal.
Step 1120: detect signal after this equilibrium in the intensity of a very first time section to obtain one first strength signal, and detect signal after this equilibrium in the intensity of one second time section to obtain one second strength signal, wherein should very first time section and this second time section be respectively the different time section that corresponds to signal after this equilibrium.
Step 1130: the intensity of adjusting this adjustable equalizer according to this first strength signal and this second strength signal.
Concise and to the point conclusion the present invention, receiver of the present invention and the method for intensity of adjusting the adjustable equalizer of receiver be detect signal after this equilibrium in the intensity of a very first time section to obtain one first strength signal, and detect signal after this equilibrium in the intensity of one second time section to obtain one second strength signal, adjust the intensity of this adjustable equalizer afterwards again according to this first strength signal and this second strength signal, thus, adjustable equalizer can automatically be adjusted to optimal intensity, makes balanced back signal to have and disturbs between minimum symbol unit and minimum jitter phenomenon.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (20)
1. receiver includes:
One adjustable equalizer is used for receiving a signal and exports a balanced back signal;
One intensity detection unit, be coupled to this adjustable equalizer, be used for detecting at least signal after this equilibrium in the intensity of a very first time section obtaining one first strength signal, and detect at least signal after this equilibrium in the intensity of one second time section to obtain one second strength signal; And
One adjustment unit is coupled to this intensity detection unit and this adjustable equalizer, is used for adjusting according to this first strength signal and this second strength signal the intensity of this adjustable equalizer.
2. receiver according to claim 1 is characterized in that, this very first time section and this second time section are respectively the different time section that corresponds to signal after this equilibrium.
3. receiver according to claim 2 is characterized in that, after this equilibrium signal after the average frequency of this second time section is to be higher than this equilibrium signal in the average frequency of this very first time section.
4. receiver according to claim 3 is characterized in that, when this first strength signal during greater than this second strength signal, this adjustment unit increases the intensity of this adjustable equalizer; When this first strength signal during less than this second strength signal, this adjustment unit downgrades the intensity of this adjustable equalizer.
5. receiver according to claim 1 is characterized in that, signal transmits video data in this section very first time after this equilibrium, and signal transmits gap data in this second time section after should equilibrium.
6. receiver according to claim 5 is characterized in that, when this first strength signal during greater than this second strength signal, this adjustment unit increases the intensity of this adjustable equalizer; When this first strength signal during less than this second strength signal, this adjustment unit downgrades the intensity of this adjustable equalizer.
7. receiver according to claim 1 is characterized in that, this intensity detection unit pack contains:
One wave amplitude detector is used for detecting after this equilibrium signal and produces a wave amplitude signal;
One first switch is coupled to an output of this wave amplitude detector, and wherein this first switch is controlled by one first control signal, and can conducting during section in this very first time;
One second switch is coupled to this output of this wave amplitude detector, and wherein this second switch is controlled by one second control signal, and can conducting during section in this second time;
One first strength signal generation unit is coupled between this first switch and this adjustment unit, is used for according to this wave amplitude signal to calculate this first strength signal; And
One second strength signal generation unit is coupled between this second switch and this adjustment unit, is used for according to this wave amplitude signal to calculate this second strength signal.
8. receiver according to claim 7 is characterized in that other includes:
One transition detecting unit, be used for receiving this signal or should equilibrium after signal, and detect this signal or should equilibrium after the transition number of times of signal; And
One control signal generating unit is used for producing this first control signal and this second control signal;
Wherein when the detected transition number of times of this transition detecting unit during less than one first critical numerical value, this control signal generating unit uses this first control signal to control the state of this first switch as conducting; And when the detected transition number of times of this transition detecting unit during greater than one second critical numerical value, this control signal generating unit uses this second control signal to control the state of this second switch as conducting.
9. receiver according to claim 7 is characterized in that other includes:
One analog-digital converter is coupled between this wave amplitude detector and this first, second switch, and being used for this wave amplitude conversion of signals is a digital wave amplitude signal;
Wherein this first strength signal generation unit is the mean value that calculates this numeral wave amplitude signal in this very first time section, to produce this first strength signal, and this second strength signal generation unit is the mean value that calculates this numeral wave amplitude signal in this second time section, to produce this second strength signal.
10. receiver according to claim 7 is characterized in that, this first strength signal generation unit and this second strength signal generation unit are respectively a low pass filter.
11. receiver according to claim 1 is characterized in that, it is a high-definition multimedia interface receiver or a digital video interface receiver.
12. the method for the intensity of an adjustable equalizer of adjusting receiver includes:
Use this adjustable equalizer to come a signal is carried out balanced operation to produce a balanced back signal;
Detect signal after this equilibrium in the intensity of a very first time section obtaining one first strength signal, and detect signal after this equilibrium in the intensity of one second time section to obtain one second strength signal; And
Adjust the intensity of this adjustable equalizer according to this first strength signal and this second strength signal.
13. method according to claim 12 is characterized in that, this very first time section and this second time section are respectively the different time section that corresponds to signal after this equilibrium.
14. method according to claim 13 is characterized in that, after this equilibrium signal after the average frequency of this second time section is to be higher than this equilibrium signal in the average frequency of this very first time section.
15. method according to claim 14 is characterized in that, when this first strength signal during greater than this second strength signal, increases the intensity of this adjustable equalizer; When this first strength signal during, downgrade the intensity of this adjustable equalizer less than this second strength signal.
16. method according to claim 12 is characterized in that, signal transmits video data in this section very first time after this equilibrium, and signal transmits gap data in this second time section after should equilibrium.
17. method according to claim 16 is characterized in that, when this first strength signal during greater than this second strength signal, increases the intensity of this adjustable equalizer; When this first strength signal during, downgrade the intensity of this adjustable equalizer less than this second strength signal.
18. method according to claim 12 is characterized in that, the step that obtains this first strength signal and this second strength signal includes:
Detect after this equilibrium signal and produce a wave amplitude signal;
Use one first control signal to control one first switch, so that this first switch can conducting during section in this very first time;
Use one second control signal to control a second switch, so that this second switch can conducting during section in this very first time;
According to this wave amplitude signal to calculate this first strength signal; And
According to this wave amplitude signal to calculate this second strength signal.
19. method according to claim 18 is characterized in that, other includes:
Receive this signal or should equilibrium after signal, and detect this signal or should equilibrium after the transition number of times of signal; And
Produce this first control signal and this second control signal;
Wherein, use this first control signal to control the state of this first switch as conducting when detected transition number of times during less than one first critical numerical value; And, use this second control signal to control the state of this second switch as conducting when detected transition number of times during greater than one second critical numerical value.
20. method according to claim 18 is characterized in that, other includes:
With this wave amplitude conversion of signals is a digital wave amplitude signal;
Signal includes with the step that obtains this first strength signal and this second strength signal after detecting this equilibrium:
Calculate the mean value of this numeral wave amplitude signal in this very first time section, to produce this first strength signal; And
Calculate the mean value of this numeral wave amplitude signal in this second time section, to produce this second strength signal.
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| CN 200910165799 CN101998075B (en) | 2009-08-10 | 2009-08-10 | Receiver and method for adjusting intensity of adjustable equalizer of receiver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI462518B (en) * | 2011-06-07 | 2014-11-21 | Realtek Semiconductor Corp | Network receiver and control method thereof |
| CN105307245A (en) * | 2014-05-28 | 2016-02-03 | 円星科技股份有限公司 | Signal sending method and signal sending device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5999223A (en) * | 1994-05-23 | 1999-12-07 | Samsung Electronics Co., Ltd. | System for controlling the operating mode of an adaptive equalizer within a digital TV signal receiver |
| US5574509A (en) * | 1994-09-08 | 1996-11-12 | Zenith Electronics Corporation | Antenna orientation system for digital TV receiver |
| US7916780B2 (en) * | 2007-04-09 | 2011-03-29 | Synerchip Co. Ltd | Adaptive equalizer for use with clock and data recovery circuit of serial communication link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI462518B (en) * | 2011-06-07 | 2014-11-21 | Realtek Semiconductor Corp | Network receiver and control method thereof |
| US8938771B2 (en) | 2011-06-07 | 2015-01-20 | Realtek Semiconductor Corp. | Network receiver and control method thereof |
| CN105307245A (en) * | 2014-05-28 | 2016-02-03 | 円星科技股份有限公司 | Signal sending method and signal sending device thereof |
| CN105307245B (en) * | 2014-05-28 | 2019-01-25 | 円星科技股份有限公司 | The method of information transmit-receive signal and training balanced device based on receiving unit balanced device |
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