CN109561237A - Circuit and relevant signal processing method applied to display device - Google Patents
Circuit and relevant signal processing method applied to display device Download PDFInfo
- Publication number
- CN109561237A CN109561237A CN201710879750.4A CN201710879750A CN109561237A CN 109561237 A CN109561237 A CN 109561237A CN 201710879750 A CN201710879750 A CN 201710879750A CN 109561237 A CN109561237 A CN 109561237A
- Authority
- CN
- China
- Prior art keywords
- circuit
- noise level
- level value
- letter
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Noise Elimination (AREA)
Abstract
The present invention discloses the circuit and relevant signal processing method of an a kind of receiver applied to a display device, it includes having a noise detecting circuit and a critical value to determine circuit, wherein the noise detecting circuit carries out noise measuring to receive signal to one to generate multiple noise level values respectively；And the critical value determines circuit to determine a critical value according to multiple noise level value, for judging whether the reception signal has pulsed interference.The critical value determines that circuit includes a ranking circuit and a selection circuit, and wherein the ranking circuit is multiple noise level value to be ranked up；And the selection circuit to the M that selects to sort in multiple noise level value noise level value using as a specific noise intensity value, wherein the critical value determines circuit and determines the critical value according to the specific noise intensity value.
Description
Technical field
The present invention about the signal processing inside display device, it is espespecially a kind of applied to display device about pulse
The circuit of formula Interference Detection and relevant signal processing method.
Background technique
In second generation digital moving-tv standard (DVB-T2), pulsed interferes (impulsive interference)
It is considered as the problem of one kind seriously affects image display, wherein pulsed interference has sudden and periodic powerful amplitude,
And usually as produced by context, such as washing machine, dish-washing machine and the automobile ... to roar past in operating etc..If
Pulsed interference can be effectively detected, then has an opportunity the signal processing mode for controlling subsequent conditioning circuit accordingly to reduce pulsed interference
It influences.In the prior art, be whether be higher than a fixed critical value through the noise intensity in detection signal to determine whether
It is interfered with pulsed, however the judgement side of this pulsed interference is possible to generate erroneous judgement.For example, when the critical value quilt
When the energy of the interference of pulsed possessed by the higher and signal of setting is weaker, the interference of these pulseds may be somebody's turn to do because of being lower than
Critical value and a part for being considered as general noise, and then lead to not correctly determine whether signal dry with pulsed
It disturbs；On the other hand, if the critical value be set it is relatively low, it is likely that general noise can be mistaken for pulsed interference.Such as
It is upper described, how to determine a critical value appropriate to judge whether signal has pulsed interference, is an important class
Topic.
Summary of the invention
Therefore, one of the objects of the present invention is to provide a kind of circuit applied to display device and relevant signal processings
Method can determine most suitable critical value, for accurately judge receive signal whether by pulsed interfere, with
Solve the problems in prior art.
In one embodiment of the invention, a kind of circuit of a receiver applied to a display device, it includes have
One noise detecting circuit and a critical value determine circuit, and wherein the noise detecting circuit carries out noise to receive signal to one
Detection to generate multiple noise level values respectively；And the critical value determines that circuit is coupled to the noise detecting circuit, and to
A critical value is determined according to multiple noise level value, wherein the critical value is used to judge whether the reception signal has arteries and veins
Rush formula interference.In one embodiment, which determines that circuit includes a ranking circuit and a selection circuit, wherein the row
Sequence circuit is coupled to the noise detecting circuit, and multiple noise level value to be ranked up；And the selection circuit coupling
It is connected to the ranking circuit, and to select to have in multiple noise level value the noise level value of sequence M using as a spy
Determine noise level value, wherein the critical value determines circuit and determines the critical value according to the specific noise intensity value.
In another embodiment of the present invention, it discloses at a kind of signal applied to a receiver of a display device
Reason method, it includes have following steps: receiving signal to one and carries out noise measuring to generate multiple noise level values respectively；It should
Multiple noise level values are ranked up；It selects in multiple noise level value with the small noise level value of N, using as a spy
Determine noise level value；And a critical value is determined according to the specific noise intensity value, wherein the critical value is used to judge to be somebody's turn to do
Receive whether signal has pulsed interference.
Detailed description of the invention
Fig. 1 is the block diagram applied in the circuit of the receiver of a display device according to one embodiment of the invention.
Fig. 2 is the ranking circuit for the embodiment that circuit is determined according to critical value of the present invention and the implementation model of selection circuit
Example diagram.
Fig. 3 is the schematic diagram according to multiple noise level values of one embodiment of the invention.
Fig. 4 is according to the ranking circuit of another embodiment of the present invention and the implementation example figure of selection circuit.
Fig. 5 is the flow chart according to a kind of signal processing method applied to a display device of one embodiment of the invention.
Fig. 6 is the schematic diagram according to the receiver of one embodiment of the invention.
Fig. 7 show the schematic diagram of frequency-region signal.
Symbol description
100 circuits
110 noise sound detecting circuits
115 critical values determine circuit
120 ranking circuits
130 selection circuits
140 adjustment circuits
150 control circuits
222_1~222_N comparison circuit
224_1~224_N delay circuit
442 low-pass filters
444 scaling circuits
500~508 steps
600 receivers
610 analog front circuits
620 cyclic prefix remove circuit
630 time-domain and frequency-domain conversion circuits
640 steering signal acquisition circuitries
642 data acquisition circuits
660 microprocessors
670 channel estimation circuits
680 eqalizing cricuits
690 signal-to-noise ratio estimation circuits
692 release of an interleave circuits
694 demap circuitries
696 decoders
698 frame processing circuits
SW1~SWN switch
Specific embodiment
As being previously mentioned in prior art, judge that pulsed interference be easy to cause erroneous judgement using a fixed critical value, therefore,
The invention proposes a kind of method that dynamic determines critical value, it is used to solve the problems, such as prior art.In one embodiment, by
In the noise of signal contain general noise (for example, additive white Gaussian noise (Additive white Gaussian noise,
AWGN)) and pulsed is interfered, and therefore, the present embodiment first determines the intensity of normal noise, later again by the strong of normal noise
Degree to generate a critical value, reuses the critical value later multiplied by a scale parameter (for example, 2) to judge whether signal has arteries and veins
Rush formula interference (if for example, noise, which is higher than the critical value, then indicates pulsed interference).However, when signal is dry with pulsed
Disturb and pulsed interference intensity it is weaker when, the intensity of general noise be likely to lid extra pulse formula interference, in this case
Determine that the critical value come is possible to that the intensity of pulsed interference can be higher than, thus cause can not to judge this intensity compared with
Weak pulsed interference.
In order to solve the problem above-mentioned, in addition the present invention proposes a kind of method that dynamic determines critical value, can be true
The intensity for protecting determined normal noise will not be comprising the part of pulsed interference, so that according to the intensity of normal noise institute
Whether the critical value determined the signal that can correctly judge has pulsed interference.Particular content embodiment institute for example below
It states.
Fig. 1 is the block diagram applied in the circuit 100 of the receiver of a display device according to one embodiment of the invention.Such as
Shown in Fig. 1, circuit 100 contains a noise detecting circuit 110 and a critical value determines circuit 115, and wherein critical value determines
Circuit 115 contains a ranking circuit 120, a selection circuit 130, an adjustment circuit 140 and a control circuit 150.At this
In embodiment, 100 system of circuit, which is set on TV or television set in box, meets second generation digital moving-tv standard (DVB-
T2 in receiver), and circuit 100 is used to dynamically determine a critical value TH, for the received signal of receiver judgement
Whether there is pulsed interference, if also just judging it with pulse that is, the noise of received signal is higher than critical value TH
Formula interference.
In circuit 100, noise detecting circuit 110, which is used to receive signal to one, carries out noise measuring sequentially to generate respectively
Multiple noise level values.As an example it is assumed that the reception signal uses an orthogonal frequency division multiplexing (Orthogonal
Frequency-Division Multiplexing, OFDM) modulator approach, then 110 system of noise detecting circuit is sequentially directed to often
One symbol (symbol) carries out noise measuring to generate the multiple noise level values for respectively corresponding multiple symbols.Then, it arranges
Sequence circuit 120 is ranked up received multiple noise level values, that is, according to noise level value from large to small or by
As low as it is ranked up greatly.Then, selection circuit 130 select to sort in multiple noise level value M noise level value as
One specific noise intensity value, in this example, it is assumed that the quantity of multiple noise level value is K, then at this time M can between 1~
(K/2) between, wherein M, K are all positive integer.As an example it is assumed that noise detecting circuit 110 generates 16 noise level values, and
It is ranked up via ranking circuit 120, then selection circuit 130 comes from the noise level value of selected and sorted the 3rd in ranking circuit 120
As the specific noise intensity value.Finally, adjustment circuit 140 generates critical value TH according to the specific noise intensity value, for
Receiver is used to judge whether the reception signal has pulsed interference.In addition, the control circuit 150 of diagram is for the row of control
The setting and operation of sequence circuit 120 and selection circuit 130, such as say the mode and selection for determining that ranking circuit 120 sorts
M value in circuit 130.
With reference to Fig. 2, for according to the ranking circuit 120 of one embodiment of the invention and the implementation example of selection circuit 130
Figure.As shown in Fig. 2, ranking circuit 120 contain multiple comparison circuit 222_1~222_N and multiple delay circuit 224_1~
224_N, and selection circuit 130 then contains multiple switch SW1~SWN.In the behaviour of ranking circuit 120 and selection circuit 130
In work, firstly, comparison circuit 222_1 can receive the 1st noise level value caused by the noise detecting circuit 110, and will
1st noise level value is exported as the smallest noise level value Vmin1 to delay circuit 224_1；Then, comparison circuit 222_
1 receives the 2nd noise level value caused by the noise detecting circuit 110, and by the 2nd noise level value and delay circuit
The 1st noise level value that 224_1 is exported is compared, and wherein lower noise level value can be strong as the smallest noise
Angle value Vmin1 is exported to delay circuit 224_1, and higher noise level value Vmax1 can be sent to the comparison circuit of next stage
222_2.The operation of comparison circuit 222_2 is similar to comparison circuit 222_1, that is, can will have lower noise level value
Vmin2 is exported to delay circuit 224_2, and higher noise level value Vmax2 can be sent to the comparison circuit of next stage
222_3.And so on, comparison circuit 222_3~222_N can respectively by compared lower noise level value Vmin3~
VminN is exported to delay circuit 224_3~224_N.As described above, the output of delay circuit 224_1~224_N will be for by as low as
Big noise level value, that is, the output of delay circuit 224_1 is the output of the smallest noise level value, delay circuit 224_2
It is the noise level value of sequence the 2nd, and the output of delay circuit 224_3 is the noise level value ... and so on of sequence the 3rd.
Then, control circuit 150 can control the noise level value of 130 selected and sorted M of selection circuit as output.
For example, control circuit 150 can continue to be connected switch SW3, and remaining is switched and closes (not turning on), so that choosing
The noise level value for selecting the output of circuit 130 sequence the 3rd, using as the specific noise intensity value.
Finally, the specific noise intensity value can be made specific calculating by adjustment circuit 140, such as adjustment circuit 140 can
Using as a scaling circuit with by the specific noise intensity value multiplied by a scale parameter (for example, 2), using as critical value
TH.In another embodiment, scale parameter also can be set as 1, or omit adjustment circuit 140 and directly by selection circuit
130 output is as critical value TH.
It is noted that in the embodiment shown in Figure 2, comparison circuit 222_1~222_N, delay circuit 224_1~
The quantity of 224_N and switch SW1~SWN can be determined according to the actual demand of hardware or limitation.In one embodiment,
Since selection circuit 130 only needs to export the noise level value of sequence the 3rd, therefore the value of N can be " 3 ", that is, reality shown in Fig. 2
It applies example and only needs to be arranged three groups of comparison circuits, delay circuit and switch.
Referring to FIG. 3, it is the schematic diagram according to multiple noise level values of one embodiment of the invention.As shown in figure 3, its
In horizontal axis be to represent each symbol (also can be considered " time "), and the longitudinal axis is then noise level value.Example shown in Fig. 3
In, the operation of noise detecting circuit 110, ranking circuit 120 and selection circuit 130 is that a section (window) for the signal is
Unit, and a section contains multiple symbols (the present embodiment is 16 symbols).It is selected in the operation for each section
Circuit 130 is selected and can export the noise level value (such as R1, R2, R3, R6 of diagram) of sequence the 3rd using as specific noise intensity
It is worth to adjustment circuit 140, and control circuit 150 can empty number stored in ranking circuit 120 after each section
Value is to carry out the operation of next section.As shown in figure 3, even if symbol has the probability of pulsed interference very high, but through this
The design of embodiment still may insure the specific noise intensity value that selection circuit 130 is exported must be general noise (for example, plus
Property white Gaussian noise (AWGN)) intensity value, without cover pulsed interference part.In the present embodiment, work as tune
When the critical value TH that whole circuit 140 is determined is located at 2 times or so (as shown, only example illustrates) of general noise, this
A critical value TH can accurately be used to judge whether signal or each symbol have pulsed interference.It is specific next
It says, with reference to Fig. 3, it is assumed that critical value determines that the critical value TH that circuit 140 is determined is located at 2 times of normal noise, then due to tool
The noise level value for having pulsed to interfere can be significantly hotter than critical value TH, and general noise significantly below critical value TH, therefore
The critical value TH determined can accurately judge that pulsed is interfered.
In the explanation above in relation to embodiment shown in Fig. 2, adjustment circuit 140 includes scaling circuit with by the spy
Noise level value is determined multiplied by a scale parameter using as critical value TH, however, in other examples, adjustment circuit 140
It more may include other circuits.With reference to Fig. 4, wherein adjustment circuit 140 contains a low-pass filter 442 and a scaling circuit
444, wherein low-pass filter 442 can to specific noise intensity value that selection circuit 130 is exported in different sections (for example,
R1, R2, R3, R6 shown in Fig. 3) make low-pass filtering treatment (also that is, smoothing processing), it is multiple too small to avoid having in some section
Noise level value when thus will not generate too small critical value.Finally, scaling circuit 444 for filtered specific noise intensity
Value is multiplied by a scale parameter (for example, 2) using as critical value TH.
Referring to FIG. 5, it is a kind of signal processing method applied to a display device according to one embodiment of the invention
Flow chart.With reference to Fig. 1~4 and disclosed above content, the process of Fig. 5 is as described below:
Step 500: process starts.
Step 502: receiving signal to one and carry out noise measuring to generate multiple noise level values respectively, wherein each noise
Intensity value is respectively corresponding to a symbol.
Step 504: multiple noise level value is ranked up.
Step 506: the noise level value for the M that selects to sort in multiple noise level value, using strong as a specific noise
Angle value.
Step 508: a critical value being generated according to the specific noise intensity value, wherein the critical value is used to judge the letter
Number whether have pulsed interference.
Circuit 100 shown in FIG. 1 can be used in the receiver of a display device, and referring to FIG. 6, it is according to this
Invent the schematic diagram of the receiver 600 of an embodiment.As shown in fig. 6, receiver 600 contains an analog front circuit 610, one
Cyclic prefix (Cyclic Prefix, CP) removes circuit 620, a time-domain and frequency-domain conversion circuit 630, a steering signal (pilot)
Acquisition circuitry 640, noise detecting circuit 110, includes ranking circuit 120, selection circuit 130, tune at a data acquisition circuit 642
Critical value decision circuit 115, a microprocessor 660, a channel estimation circuit 670, first-class for whole circuit 140, control circuit 150
Change device 680, a signal-to-noise ratio (Signal-to-Noise Ratio, SNR) estimation circuit 690, a release of an interleave (de-
Interleave) circuit 692, a demap circuitry 694, a decoder 696 and a frame processing circuit 698.In the present embodiment
In, receiver 600 is to be set on TV or television set in box and meet second generation digital moving-tv standard (DVB-T2)
Receiver, and after receiver 600 is used to handle the analog input signal from antenna, generates and one output signal to TV
Or the back-end processing circuit on television set in box, for playing on the screen.In addition, the received simulation of 600 institute of receiver is defeated
Enter the modulator approach that signal uses an orthogonal frequency division multiplexing (OFDM).
In receiver 600, after 610 system of analog front circuit is used to handle the analog input signal from antenna
A digit input signal is generated, specifically, analog front circuit 610 may include a radio frequency to intermediate frequency mixer, a band
Bandpass filter, a simulation to digital converter, an intermediate frequency to fundamental frequency mixer, a low-pass filter ... etc. element are with to being connect
The analog input signal of receipts is handled to generate the digit input signal.Cyclic prefix removes 620 system of circuit and is used to remove this
Cyclic prefix in digital input signals is to generate the digital input signals for removing cyclic prefix.Time-domain and frequency-domain conversion circuit 630
The digital input signals of the removal cyclic prefix are converted into frequency domain by time domain to generate a frequency-region signal, wherein time-domain and frequency-domain turns
Changing circuit 630 can realize through being operated using a fast Fourier transform.It please also refer to showing for the frequency-region signal of Fig. 7
It is intended to, wherein longitudinal axis part is the OFDM symbol for representing different time, and each column (row) are an OFDM symbol, each
OFDM symbol has separately included an edge steering signal unit (edge pilot cell), multiple data cells (data cell)
And multiple dispersion steering signal units (scattered pilot cell)；Horizontal axis part is then to represent frequency, and every a line
(column) then it is respectively corresponding to different carrier waves.
The multiple steering signal lists captured in the frequency-region signal in a symbol of steering signal acquisition circuitry 640
Member (can for edge guides signal element and/or dispersion steering signal unit, illustrate below be all to disperse steering signal unit
Example).The operation of noise detecting circuit 110, ranking circuit 120, selection circuit 130, adjustment circuit 140 and control circuit 150
With described in above embodiment；In addition, 110 system of noise detecting circuit according to steering signal acquisition circuitry 640 capture it is multiple
Steering signal unit respectively corresponds multiple symbols to be sequentially directed to the progress noise measuring of each symbol (symbol) to generate
Multiple noise level values, and in the present embodiment, noise detecting circuit 110 can be used as pulsed disturbance detection circuit separately with root
Critical value TH caused by circuit 115 is determined according to the noise intensity and critical value of multiple steering signal unit to judge this
Whether symbol there is pulsed to interfere to generate a testing result, it should be noted that, noise detecting circuit 110 is not according to multiple numbers
Noise level value corresponding to symbol is generated according to the noise intensity of unit.Then, microprocessor 660 is according to the testing result control
Channel estimation circuit 670 processed calculates channel frequence corresponding to the symbol in the frequency-region signal using different calculations
Response.On the other hand, data acquisition circuit 642 captures multiple data cells in the symbol from the frequency-region signal, and waits
Change device 680 according to the calculated channel frequences response of the institute of channel estimation circuit 670 to carry out multiple data cell etc. and change
Operation is to generate signal after first.Then, estimation result of the signal-to-noise ratio estimation circuit 690 according to the channel estimation circuit 670
The estimation of signal-to-noise ratio is carried out to generate signal-to-noise ratio estimation as a result, and supplying microprocessor 660 as letter to signal after the grade
Number processing reference.Release of an interleave circuit 692 carries out de-interleaving operation to signal after the grade to generate signal after release of an interleave, Xie Ying
Transmit-receive radio road 694 carries out demapping operation to signal after the release of an interleave to generate multiple code words, and decoder 696 carries out those code words
Low-density parity check code (Low-Density Parity-Check code, LDPC code) and Bo Xi-Cao Duli-Huo Quan
The Chinese (Bose-Chaudhuri-Hocquenghem, BCH) decoding, to obtain multiple decoded signals so that subsequent frame is handled
Circuit 698 is handled.
The brief summary present invention is through the multiple noises of selection in the circuit applied to display device of the invention
Sort in the sound intensity angle value M letter noise level value as general noise sound intensity, and the value of M be less than multiple noise sound
The half of the quantity of intensity value, and this selected letter noise level value can be ensured that the portion that will not be interfered comprising pulsed
Point, therefore the critical value determined according to the intensity of general noise sound the signal that correctly judges can be allowed whether to have
There is pulsed interference.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (20)
1. a kind of circuit of a receiver applied to a display device, includes:
One noise sound detecting circuit carries out noise sound detection to receive signal to one to generate multiple letter noise intensities respectively
Value；And
One critical value determines circuit, the noise sound detecting circuit is coupled to, to determine according to multiple letter noise level value
One critical value, wherein the critical value system is used to judge whether the reception signal has pulsed interference, and wherein the critical value is determined
Determining circuit includes:
One ranking circuit is coupled to the noise sound detecting circuit, multiple letter noise level value to be ranked up；And
One selection circuit is coupled to the ranking circuit, to select multiple noise sound intensity for believing the M that sorts in noise level value
Angle value is using as a specific letter noise level value, wherein the critical value determines circuit and determines according to the specific letter noise level value
The critical value.
2. circuit as described in claim 1, which is characterized in that the corresponding quantity to multiple letter noise level value is K, and M
Between 1~(K/2).
3. circuit as described in claim 1, which is characterized in that the critical value determines that circuit also includes:
One scaling circuit, the specific letter noise level value is obtained the critical value multiplied by a scale parameter.
4. circuit as described in claim 1, which is characterized in that the critical value determines that circuit also includes:
One low-pass filter, the specific letter noise level value is carried out low-pass filtering operation to generate specific letter after a filtering
Noise level value；And
One scaling circuit, is coupled to the low-pass filter, to join letter noise level value specific after the filtering multiplied by a ratio
Number is to obtain the critical value.
5. circuit as claimed in claim 4, which is characterized in that the noise sound detecting circuit, the ranking circuit and the selection
The operation of circuit is with a section (window) for the reception signal for unit, and the selection circuit exports each corresponding section
Specific letter noise level value；And multiple specific letter noise level values for being arrived according to corresponding to multiple sections of the low-pass filter come
Generate specific letter noise level value after the filtering.
6. circuit as claimed in claim 5, which is characterized in that the critical value determines that circuit also includes:
One control circuit is coupled to the ranking circuit and the selection circuit, when the ranking circuit and the selection circuit are completed
When the wherein operation of a section of the reception signal, which controls stores in the ranking circuit and the selection circuit
Numerical value.
7. circuit as described in claim 1, which is characterized in that the reception signal is an analog input signal, which separately wraps
Contain:
One analog front circuit, the analog input signal is converted to a digital input signals；And
One time-domain and frequency-domain conversion circuit, is coupled to the analog front circuit, to be converted to the digital input signals by time domain
Frequency domain is to generate a frequency-region signal；
Wherein the noise sound detecting circuit is to carry out noise sound detection to the frequency-region signal to generate multiple noise sound intensity respectively
Angle value.
8. circuit as claimed in claim 7, which is characterized in that the frequency-region signal contains multiple symbols (symbol), each
A symbol contains multiple steering signal units and the circuit has additionally comprised:
One steering signal (pilot) acquisition circuitry, be coupled to the time-domain and frequency-domain conversion circuit and the noise sound detecting circuit it
Between, to capture multiple steering signal unit (pilot cell) in each symbol from the frequency-region signal；
Wherein the noise sound detecting circuit is produced according to the letter noise intensity of multiple steering signal unit in each symbol
Give birth to the letter noise level value corresponding to it.
9. circuit as claimed in claim 8, which is characterized in that each symbol further comprises multiple data cells, and the letter
Noise detecting circuit does not generate the letter noise level value corresponding to it according to the letter noise intensity of multiple data cell.
10. circuit as described in claim 1, which is characterized in that the ranking circuit includes:
One first comparison circuit, to compare two letter noise level values to generate one first minimum letter noise level value and one
First maximum letter noise level value；
One first delay circuit is coupled to first comparison circuit, to postpone the first minimum letter noise level value to generate
It is in this two letter noise level values first, and another from noise sound detection electricity in this two letter noise level values
Road；
One second comparison circuit is coupled to first comparison circuit, to compare the first maximum letter noise level value and another
One letter noise level value is to generate one second minimum letter noise level value and one second maximum letter noise level value；And
One second delay circuit is coupled to first comparison circuit, to postpone the second minimum letter noise level value to generate
Another letter noise level value.
11. a kind of signal processing method of a receiver applied to a display device, includes:
Signal, which is received, to one carries out noise sound detection to generate multiple letter noise level values respectively；
Multiple letter noise level value is ranked up；
The letter noise level value of M of sorting in multiple letter noise level value is selected, using as a specific letter noise level value；With
And
A critical value is determined according to the specific letter noise level value, and wherein the critical value system is used to judge that the reception signal is
It is no that there is pulsed interference.
12. signal processing method as claimed in claim 11, which is characterized in that the corresponding number to multiple letter noise level value
Amount is K, and M is between 1~(K/2).
13. signal processing method as claimed in claim 11, which is characterized in that generated according to the specific letter noise level value
The step of critical value, includes:
The specific letter noise level value is obtained into the critical value multiplied by a scale parameter.
14. signal processing method as claimed in claim 11, which is characterized in that generated according to the specific letter noise level value
The step of critical value, includes:
The specific letter noise level value is subjected to low-pass filtering operation to generate specific letter noise level value after a filtering；And
Letter noise level value specific after the filtering is obtained into the critical value multiplied by a scale parameter.
15. signal processing method as claimed in claim 14, which is characterized in that generate multiple letter noise level value, should
Multiple letter noise level values are ranked up and select multiple letter noise level value for believing the M that sorts in noise level value
Step is carried out so that a section (window) for the reception signal is unit；And the specific letter noise level value is subjected to low pass
Filtering operation includes the step of specific letter noise level value after the filtering to generate:
According to corresponding to multiple sections to multiple specific letter noise level values generate specific letter noise level value after the filtering.
16. signal processing method as claimed in claim 15, which is characterized in that multiple letter noise level value to be ranked up
And the step of selecting multiple letter noise level value for believing the M that sorts in noise level value, is respectively by a ranking circuit and one
Selection circuit carries out, and the signal processing method also includes:
When completing the wherein operation of a section of the reception signal, controls and store in the ranking circuit and the selection circuit
Numerical value.
17. signal processing method as claimed in claim 11, which is characterized in that the reception signal is an analog input signal,
The signal processing method has additionally comprised:
The analog input signal is converted into a digital input signals；And
The digital input signals are converted into frequency domain by time domain to generate a frequency-region signal；
Wherein carry out noise sound detection to the signal to generate respectively includes the step of multiple letter noise level values:
Noise sound detection is carried out to generate multiple letter noise level value respectively to the frequency-region signal.
18. signal processing method as claimed in claim 17, which is characterized in that the frequency-region signal contains multiple symbols
(symbol), each symbol contains multiple steering signal units and the signal processing method has additionally comprised:
Multiple steering signal unit (pilot cell) in each symbol is captured from the frequency-region signal；And
Carry out noise sound detection to the frequency-region signal to generate respectively includes the step of multiple letter noise level value:
The noise sound intensity corresponding to it is generated according to the letter noise intensity of multiple steering signal unit in each symbol
Angle value.
19. signal processing method as claimed in claim 18, which is characterized in that each symbol further comprises multiple data sheets
Member, and the step of generating corresponding letter noise level value is not judged according to the letter noise intensity of multiple data cell.
20. circuit as claimed in claim 11, which is characterized in that the step of being ranked up multiple letter noise level value packet
Contain:
Compare two letter noise level values to generate one first minimum letter noise level value and one first maximum letter noise intensity
Value；
Postpone the first minimum letter noise level value with generate in this two letter noise level values first, and two noise sound
It is another to the one in multiple letter noise level value in intensity value；
Compare the first maximum letter noise level value and another letter noise level value to generate one second minimum letter noise intensity
Value and one second maximum letter noise level value；And
Postpone the second minimum letter noise level value to generate another letter noise level value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879750.4A CN109561237A (en) | 2017-09-26 | 2017-09-26 | Circuit and relevant signal processing method applied to display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879750.4A CN109561237A (en) | 2017-09-26 | 2017-09-26 | Circuit and relevant signal processing method applied to display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109561237A true CN109561237A (en) | 2019-04-02 |
Family
ID=65863172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710879750.4A Withdrawn CN109561237A (en) | 2017-09-26 | 2017-09-26 | Circuit and relevant signal processing method applied to display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109561237A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645589A (en) * | 2012-04-11 | 2012-08-22 | 清华大学 | Pulse detection method and system |
| CN104502968A (en) * | 2014-12-26 | 2015-04-08 | 吉林大学 | Method for detecting seismic data of controllable seismic sources on basis of multistage threshold median filtering |
| CN104753840A (en) * | 2013-12-27 | 2015-07-01 | 晨星半导体股份有限公司 | Receiving method of orthogonal frequency-division multiple access signals and receiver |
-
2017
- 2017-09-26 CN CN201710879750.4A patent/CN109561237A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645589A (en) * | 2012-04-11 | 2012-08-22 | 清华大学 | Pulse detection method and system |
| CN104753840A (en) * | 2013-12-27 | 2015-07-01 | 晨星半导体股份有限公司 | Receiving method of orthogonal frequency-division multiple access signals and receiver |
| CN104502968A (en) * | 2014-12-26 | 2015-04-08 | 吉林大学 | Method for detecting seismic data of controllable seismic sources on basis of multistage threshold median filtering |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI474690B (en) | A radio sensor for detecting wireless microphone signals and a method thereof | |
| CN112737711B (en) | Broadband carrier detection method based on adaptive noise floor estimation | |
| US8965318B2 (en) | Dynamic RFI detection | |
| CN102932295A (en) | Data reception apparatus | |
| CN1199286A (en) | Echo canceler employing segment-based reinitialization | |
| CN102880347A (en) | Touch screen equipment and processing method of touch screen equipment | |
| US20070165753A1 (en) | Impulse noise remover and related method | |
| CN109561237A (en) | Circuit and relevant signal processing method applied to display device | |
| US20040228426A1 (en) | Apparatus and method for cancelling narrow-band interference in a mobile communication system | |
| CN107612864B (en) | Decision threshold value setting method of burst mode simplified symbol synchronization method | |
| JP2005531246A (en) | Method and apparatus for wavelet noise removal | |
| TWI646842B (en) | Circuit applied to display device and related signal processing method | |
| CN107015124A (en) | A kind of Partial discharge signal disturbance restraining method decomposed based on framing adaptive sparse | |
| JP2000115144A (en) | Multi-dimensional pseudo noise generation circuit for soft decision demodulation | |
| KR101455841B1 (en) | Frequency sensing method and apparatus for ofdm system | |
| CN102611470B (en) | Anti-interference receiving machine in differential frequency hopping communication system and operation method of anti-interference receiving machine | |
| Benson et al. | Adaptive thresholding for high dual-tone signal instantaneous dynamic range in digital microwave receiver | |
| CN112764596A (en) | Capacitive touch anti-interference detection device, system and method | |
| TWI640196B (en) | Circuit applied to display apparatus and associated signal processing method | |
| CN108833738B (en) | Circuit applied to display equipment and related signal processing method | |
| JP5565066B2 (en) | Receiver | |
| TW201742382A (en) | Impulsive noise detection circuit and method thereof | |
| JP3886797B2 (en) | Tone detector | |
| CN103546415B (en) | Single multi-carrier signal method of discrimination and signal receiving device | |
| CN110297127B (en) | Alternating current signal filtering method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191224 Address after: No.1, Duhang 1st Road, Hsinchu City, Hsinchu Science Park, Taiwan, China Applicant after: MediaTek.Inc Address before: 1/2, 4th floor, 26 Taiyuan Street, Zhubei City, Hsinchu County, Taiwan, China Applicant before: MStar Semiconductor Co., Ltd. |
|
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190402 |