Channel searching method, device and equipment for digital signal broadcasting and medium

Abstract

The invention discloses a channel searching method, device and equipment for digital signal broadcasting and a medium, and the method comprises the steps: receiving a channel searching instruction, carrying out the signal searching of a preset frequency range, obtaining the signal intensity information, carrying out the signal intensity screening of frequency points in the frequency range according to the signal intensity information, and obtaining alternative frequency points, interference frequency points in the alternative frequency points are further eliminated to obtain effective frequency points, digital signals of the effective frequency points are decoded, the carrier-to-noise ratio of the decoded signals is obtained, and the effective frequency points matched with the carrier-to-noise ratio interval are obtained to serve as program frequency points and stored in a radio program sequence. According to the channel searching method for digital signal broadcasting, the frequency points are screened step by step by using the related parameters in the progressive decoding processing process of the digital broadcasting signals, so that invalid or interference frequency points are screened out in advance, and the channel searching time is greatly optimized while the quality and the number of radio programs are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of digital signal processing, and in particular, to a method, device, equipment and medium for searching radio stations for digital signal broadcasting. Background Art

[0002] Radios are usually configured inside automobiles and trucks. To listen to radio programs, it is necessary to search for digital broadcast signals to obtain program frequencies. However, in the existing technical methods, multiple judgments need to be repeated at each frequency point during radio station searching, resulting in a long time-consuming searching process, and users need to wait for a long time during the radio station searching operation. Therefore, there is a problem in the existing technical methods that digital broadcast signals cannot be quickly searched. Summary of the Invention

[0003] Embodiments of the present invention provide a method, device, equipment and medium for searching radio stations for digital signal broadcasting, aiming to solve the problem in the existing technical methods that digital broadcast signals cannot be quickly searched.

[0004] In a first aspect, embodiments of the present invention provide a method for searching radio stations for digital signal broadcasting, wherein the method includes:

[0005] Receiving a radio station search instruction input by a user, obtaining a preset frequency range for signal search, and recording corresponding signal strength information;

[0006] Performing signal strength screening on frequency points within the frequency range according to a preset frequency screening rule and the signal strength information to obtain corresponding alternative frequency points;

[0007] Excluding interfering frequency points in the alternative frequency points according to a preset interfering frequency point exclusion rule to obtain corresponding valid frequency points;

[0008] Decoding digital signals of each of the valid frequency points according to a preset decoding rule and obtaining the carrier-to-noise ratio of the decoded signal;

[0009] Obtaining valid frequency points that match a preset carrier-to-noise ratio range according to the carrier-to-noise ratio as program frequency points and storing them in a preset radio station program sequence.

[0010] In a second aspect, embodiments of the present invention further provide a device for searching radio stations for digital signal broadcasting, wherein the device is used to execute the method for searching radio stations for digital signal broadcasting as described in the first aspect above, and the device includes:

[0011] A signal strength information acquisition unit, configured to receive a radio station search instruction input by a user, obtain a preset frequency range for signal search, and record corresponding signal strength information;

[0012] An alternative frequency point acquisition unit, configured to perform signal strength screening on frequency points within the frequency range according to a preset frequency screening rule and the signal strength information, so as to obtain corresponding alternative frequency points;

[0013] An effective frequency point acquisition unit, configured to exclude interfering frequency points in the alternative frequency points according to a preset interfering frequency point exclusion rule, so as to obtain corresponding effective frequency points;

[0014] A carrier-to-noise ratio acquisition unit, configured to decode the digital signals of the respective effective frequency points according to a preset decoding rule and obtain the carrier-to-noise ratio of the decoded signals;

[0015] A program frequency point storage unit, configured to obtain effective frequency points matching a preset carrier-to-noise ratio range according to the carrier-to-noise ratio, and store the effective frequency points as program frequency points into a preset radio program sequence.

[0016] In a third aspect, an embodiment of the present invention further provides a computer device, where the device includes a processor, a communication interface, a memory, and a communication bus, and the processor, the communication interface, and the memory complete communication with each other through the communication bus;

[0017] The memory is used to store a computer program;

[0018] The processor is configured to implement the steps of the radio station search method for digital signal broadcasting described in the first aspect above when executing the program stored on the memory.

[0019] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the radio station search method for digital signal broadcasting described in the first aspect above.

[0020] An embodiment of the present invention provides a radio station search method, apparatus, device, and medium for digital signal broadcasting. The method includes: receiving a radio station search instruction, then performing signal search on a preset frequency range to obtain signal strength information, performing signal strength screening on frequency points within the frequency range according to the signal strength information to obtain alternative frequency points, further excluding interfering frequency points in the alternative frequency points to obtain effective frequency points, decoding the digital signals of the effective frequency points and obtaining the carrier-to-noise ratio of the decoded signals, and obtaining effective frequency points matching a carrier-to-noise ratio range as program frequency points and storing them into a radio program sequence. The above radio station search method for digital signal broadcasting can perform signal strength screening and interference frequency point exclusion, obtain the carrier-to-noise ratio after obtaining the effective frequency points, thereby screening out program frequency points, and use relevant parameters in the progressive decoding process of digital broadcast signals to gradually screen the frequency points, so as to pre-screen out invalid or interfering frequency points in advance, greatly optimizing the radio station search time while ensuring the quality and quantity of radio programs, and realizing fast radio station search for digital broadcast signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a flowchart of the channel search method for digital signal broadcasting provided by the embodiment of the present invention;

[0023] Figure 2 It is a schematic block diagram of the channel search device for digital signal broadcasting provided by the embodiment of the present invention;

[0024] Figure 3 It is a schematic block diagram of the computer device provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0026] It should be understood that when used in this specification and the appended claims, the terms "comprises" and "comprising" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0027] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0028] It should be further understood that the term " / and" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0029] An embodiment of the present invention provides a channel search method for digital signal broadcasting. This method is applied to a terminal device. The terminal device executes the stored software program to implement the above channel search method for digital signal broadcasting. The terminal device can be an in-vehicle terminal configured in a vehicle. The in-vehicle terminal can be integrated with a radio receiving module. The radio receiving module receives digital broadcast signals, and the in-vehicle terminal processes the digital broadcast signals to obtain broadcast program signals for playback.

[0030] As Figure 1 shown, the method includes steps S110 to S150.

[0031] S110. Receive a channel search instruction input by the user, obtain a preset frequency range for signal search, and record the corresponding signal strength information.

[0032] Receive a channel search instruction input by the user, obtain a preset frequency range for signal search, and record the corresponding signal strength information. The user can input a channel search instruction into the terminal device. When the terminal device receives the channel search instruction, it enters the channel search processing flow. A preset frequency range can be obtained, and signal search is performed within this frequency range to obtain the signal strength corresponding to each frequency point within the frequency range, and the signal strength information is obtained.

[0033] The frequency range is a frequency interval composed of continuous frequencies. For example, the frequency range can be [200 MHz, 600 MHz]. In actual application, 0.02 MHz can be used as the resolution to determine the frequency points in the frequency range, and the frequency difference between adjacent frequency points is 0.02 MHz. Among them, the signal strength of the frequency point can be RSSI (Received Signal Strength Indicator), and RSSI is used to represent the received signal strength. RSSI is usually expressed in negative dBm (decibel milliwatt) units. The closer this value is to 0, the stronger the signal.

[0034] S120. Perform signal strength screening on the frequency points within the frequency range according to the preset frequency screening rule and the signal strength information to obtain the corresponding alternative frequency points.

[0035] Perform signal strength screening on the frequency points within the frequency range according to the preset frequency screening rule and the signal strength information to obtain the corresponding alternative frequency points. Further, there are multiple frequency points within the frequency range. The signal strength screening of the frequency points can be performed through the frequency screening rule and the signal strength information obtained in the above steps, that is, the frequency points with signal strength meeting the frequency screening rule are selected as alternative frequency points.

[0036] In a specific embodiment, step S120 includes sub-steps: determining whether the signal strength of each frequency point in the signal strength information is less than the signal strength threshold in the frequency screening rule; obtaining the frequency points with signal strength less than the signal strength threshold as alternative frequency points.

[0037] Specifically, a signal strength threshold is set in the frequency screening rule, and it can be determined whether the signal strength of each frequency point in the signal strength information is less than the signal strength threshold; if the signal strength is less than the signal strength threshold, it indicates that the signal of the frequency point is strong, and this frequency point is determined as an alternative frequency point; if the signal strength is not less than the signal strength threshold, it indicates that the signal of the frequency point is weak, and this frequency point is screened out.

[0038] S130. Exclude the interfering frequency points in the alternative frequency points according to the preset interfering frequency point exclusion rule to obtain the corresponding effective frequency points.

[0039] Exclude the interfering frequency points in the alternative frequency points according to the preset interfering frequency point exclusion rule to obtain the corresponding effective frequency points. Further, to avoid interference between frequency points, the obtained alternative frequency points can be screened according to the interference exclusion rule, so as to exclude the interfering frequency points among them and obtain the effective frequency points.

[0040] In a specific embodiment, step S130 includes sub-steps: determining the background frequency range corresponding to each alternative frequency point according to the frequency offset value in the interfering frequency point exclusion rule; obtaining the broadband signal strength corresponding to the background frequency range of each alternative frequency point in the signal strength information; calculating the difference between the narrowband signal strength and the corresponding broadband signal strength of the alternative frequency point as the signal quality coefficient of the alternative frequency point; excluding the alternative frequency points whose signal quality coefficients are not within the coefficient range set in the interfering frequency point exclusion rule to obtain the remaining alternative frequency points as effective frequency points.

[0041] Specifically, the background frequency range corresponding to each alternative frequency point can be determined according to the frequency offset value in the exclusion rule. For example, if the frequency offset value is 0.1 MHz, the determined background frequency range corresponding to the alternative frequency point is [f0 - 0.1 MHz, f0 + 0.1 MHz], where f0 is the frequency value of a certain alternative frequency point.

[0042] Further, broadband signal strength values corresponding to the background frequency intervals of each alternative frequency point can be obtained from the signal strength information. The signal strength of the frequency point matching the background frequency interval in the signal strength information can be obtained and its absolute value can be taken to obtain the broadband signal strength value corresponding to the background frequency interval. The narrowband signal strength of the alternative frequency point is subtracted from the broadband signal strength corresponding to the alternative frequency point, and the obtained difference can be used as the signal quality coefficient of the alternative frequency point. The larger the Signal Quality Index (SQI), the more dominant the target signal is, the less adjacent frequency interference or noise there is, and the higher the signal quality. When the signal quality coefficient is close to zero or negative, it indicates that there is strong adjacent frequency interference or noise and the signal quality is poor.

[0043] Further, it is determined whether the signal quality coefficient of each alternative frequency point is within the coefficient interval set in the interference frequency point exclusion rule. If the signal quality coefficient of the alternative frequency point is not within the coefficient interval, it is determined that the alternative frequency point is an interference frequency point and needs to be excluded. If the signal quality coefficient of the alternative frequency point is within the coefficient interval, the alternative frequency point is retained. After excluding the interference frequency points, the retained alternative frequency points can be used as the corresponding effective frequency points.

[0044] In a specific embodiment, before excluding the alternative frequency points whose signal quality coefficients are not within the coefficient interval set in the interference frequency point exclusion rule according to the interference frequency point exclusion rule, it further includes: setting the coefficient interval in the interference frequency point exclusion rule according to the preset coefficient interval setting rule and the number of alternative frequency points.

[0045] According to the preset coefficient interval setting rule and the number of alternative frequency points, the coefficient interval in the interference frequency point exclusion rule can be correspondingly set. For example, the coefficient interval setting rule can be expressed by formula (1):

[0046]

[0047] where S min is the lower limit value of the coefficient interval, and the upper limit value (maximum value) of the coefficient interval can be set to 127; S0 is the default coefficient value, for example, S0 can be set to 25, and N is the number of alternative frequency points. After calculating the lower limit value based on the above formula, the coefficient interval can be correspondingly set as [S min , 127].

[0048] S140. Decode the digital signals of each of the effective frequency points according to the preset decoding rule and obtain the carrier-to-noise ratio of the decoded signal.

[0049] Decode the digital signals of each of the effective frequency points according to the preset decoding rules and obtain the carrier-to-noise ratio of the decoded signals. Further, the digital signals of each effective frequency point can be decoded according to the preset decoding rules. The digital signals are binary strings composed of "0" and "1". To obtain the broadcast program content in the digital signals, the digital signals can be decoded according to the decoding rules, so as to convert the binary string into corresponding audio information as the decoded signal, and this decoded signal is also the obtained broadcast program content. Further obtain the carrier-to-noise ratio (CNR, Carrier-to-Noise Ratio) of the decoded signal. The carrier-to-noise ratio is a standard measurement scale used to indicate the relationship between the carrier and the carrier noise; a high carrier-to-noise ratio can provide a better network reception rate, better network communication quality, and better network reliability.

[0050] In a specific embodiment, step S140 includes sub-steps: decode the digital signals of each of the effective frequency points according to the decoding rules to obtain corresponding decoded signals; obtain the carrier power and noise power in the decoded signals; calculate the carrier power and noise power of the effective frequency points according to the carrier-to-noise ratio calculation formula in the decoding rules to obtain the corresponding carrier-to-noise ratio.

[0051] Specifically, the digital signals corresponding to each effective frequency point and a preset duration (such as 10 seconds) can be obtained, and the digital signals of each effective frequency point can be decoded according to the decoding rules, so as to obtain the decoded signals recorded in audio information. Further obtain the carrier power and noise power from the decoded signals, then a set of carrier power and noise power can be obtained corresponding to each effective frequency point; among them, the carrier power is represented by Pc, and the noise power is represented by Pn.

[0052] Calculate the carrier power and noise power of each effective frequency point according to the carrier-to-noise ratio calculation formula in the decoding rules, and the carrier-to-noise ratio can be obtained; among them, the carrier-to-noise ratio calculation formula can be expressed by formula (2):

[0053]

[0054] Among them, CNR is the carrier-to-noise ratio of a certain effective frequency point obtained by calculation, and lg is the logarithmic operation with base 10.

[0055] S150. Obtain the effective frequency points that match the preset carrier-to-noise ratio range according to the carrier-to-noise ratio as program frequency points and store them in the preset radio program sequence.

[0056] Obtain a valid frequency point that matches a preset carrier-to-noise ratio range as a program frequency point according to the carrier-to-noise ratio, and store it in a preset radio program sequence. Further, the carrier-to-noise ratio of the valid frequency point can be matched according to a pre-configured carrier-to-noise ratio range, so as to obtain a valid frequency point that matches the carrier-to-noise ratio range as a program frequency point. Obtain all program frequency points and store them correspondingly in the pre-configured radio program sequence for backup, then all available program frequency points are stored in the radio program sequence.

[0057] In a specific embodiment, step S150 includes sub-steps: obtaining a valid frequency point whose carrier-to-noise ratio matches the carrier-to-noise ratio range as a program frequency point; obtaining a program identifier corresponding to each program frequency point and storing it in the radio program sequence.

[0058] Obtain a valid frequency point whose carrier-to-noise ratio matches the carrier-to-noise ratio range as a program frequency point. For example, if the carrier-to-noise ratio range can be set to [7, +∞), then the valid frequency points whose carrier-to-noise ratio is within this carrier-to-noise ratio range are program frequency points. Further obtain the program identifier corresponding to each program frequency point. Specifically, the frequency values of each program frequency point can be sorted from large to small, and the serial number of each program frequency point is obtained in turn as the corresponding program identifier. Combine the program identifier and the program frequency point and store them in the radio program sequence, then the radio program sequence contains the program identifier and the program frequency points corresponding to each program identifier.

[0059] In a specific embodiment, after step S150, there is also a step: determining whether the carrier-to-noise ratio of each program frequency point in the radio program sequence is within a preset adjustment range; if the program frequency point is within the adjustment range, adjust the program volume of the program frequency point according to a preset adjustment parameter.

[0060] Further, it can be determined whether the carrier-to-noise ratio of each program frequency point in the radio program sequence is within a preset adjustment range. For example, the adjustment range can be set to [7, 10]. If the carrier-to-noise ratio of the program frequency point is within this adjustment range, the program volume of the program frequency point can be adjusted according to the adjustment parameter. For example, the adjustment parameter can be to reduce the program volume by a set ratio or set the program volume of this program frequency point to zero (set to mute); if the set ratio is 0.5, adjust the program volume of the program frequency point to 0.5 of the current volume. If the program volume of this program frequency point is set to zero, set the program volume of the program frequency point to 0. The adjustment parameter can be preset by the user and stored in the terminal device.

[0061] In the channel search method for digital signal broadcasting disclosed in the above embodiments, the method includes: when receiving a channel search instruction, performing signal search on a preset frequency range to obtain signal strength information, screening the signal strength of frequency points within the frequency range according to the signal strength information to obtain candidate frequency points, further excluding interfering frequency points among the candidate frequency points to obtain valid frequency points, decoding the digital signals of the valid frequency points and obtaining the carrier-to-noise ratio of the decoded signals, and obtaining valid frequency points matching the carrier-to-noise ratio interval as program frequency points and storing them in the radio program sequence. The above channel search method for digital signal broadcasting can perform signal strength screening and interference frequency point exclusion, obtain the carrier-to-noise ratio after obtaining the valid frequency points, thereby screening out the program frequency points, and use the relevant parameters in the progressive decoding process of the digital broadcast signal to gradually screen the frequency points, so as to pre-screen and remove invalid or interfering frequency points in advance, greatly optimizing the channel search time while ensuring the quality and quantity of radio programs, and realizing fast channel search for digital broadcast signals.

[0062] An embodiment of the present invention further provides a channel search device for digital signal broadcasting. The channel search device for digital signal broadcasting can be configured in a terminal device and is used to execute any one of the foregoing embodiments of the channel search method for digital signal broadcasting. Specifically, please refer to Figure 2 , Figure 2 which is a schematic block diagram of the channel search device for digital signal broadcasting provided by an embodiment of the present invention.

[0063] As Figure 2 shown, the channel search device 100 for digital signal broadcasting includes a signal strength information acquisition unit 110, a candidate frequency point acquisition unit 120, a valid frequency point acquisition unit 130, a carrier-to-noise ratio acquisition unit 140, and a program frequency point storage unit 150.

[0064] The signal strength information acquisition unit 110 is used to receive a channel search instruction input by a user, obtain a preset frequency range for signal search, and record the corresponding signal strength information.

[0065] The candidate frequency point acquisition unit 120 is used to screen the signal strength of frequency points within the frequency range according to a preset frequency screening rule and the signal strength information to obtain the corresponding candidate frequency points.

[0066] The valid frequency point acquisition unit 130 is used to exclude interfering frequency points among the candidate frequency points according to a preset interfering frequency point exclusion rule to obtain the corresponding valid frequency points.

[0067] The carrier-to-noise ratio acquisition unit 140 is used to decode the digital signals of each valid frequency point according to a preset decoding rule and obtain the carrier-to-noise ratio of the decoded signals.

[0068] A program frequency point storage unit 150 is configured to obtain, according to the carrier-to-noise ratio, a valid frequency point that matches a preset carrier-to-noise ratio range as a program frequency point and store it in a preset radio program sequence.

[0069] In the radio station searching device for digital signal broadcasting provided by the embodiment of the present invention, the above-mentioned radio station searching method for digital signal broadcasting is applied. When receiving a radio station searching instruction, it searches for signals within a preset frequency range to obtain signal strength information, screens the frequency points within the frequency range according to the signal strength information to obtain candidate frequency points, further excludes the interfering frequency points among the candidate frequency points to obtain valid frequency points, decodes the digital signals of the valid frequency points and obtains the carrier-to-noise ratio of the decoded signals, obtains the valid frequency points that match the carrier-to-noise ratio range as program frequency points and stores them in the radio program sequence. The above-mentioned radio station searching method for digital signal broadcasting can perform signal strength screening and interference frequency point exclusion, obtain the carrier-to-noise ratio after obtaining the valid frequency points so as to screen out the program frequency points, and use the relevant parameters in the progressive decoding process of the digital broadcast signal to gradually screen the frequency points, thereby pre-screening and removing invalid or interfering frequency points in advance, greatly optimizing the radio station searching time while ensuring the quality and quantity of radio programs, and realizing fast radio station searching for digital broadcast signals.

[0070] The above-mentioned radio station searching device for digital signal broadcasting can be implemented in the form of a computer program, and this computer program can run on a computer device as shown in Figure 3 shown.

[0071] Please refer to Figure 3 , Figure 3 which is a schematic block diagram of the computer device provided by the embodiment of the present invention. This computer device can be a terminal device for executing the radio station searching method for digital signal broadcasting to perform fast radio station searching processing for digital signal broadcasting.

[0072] Refer to Figure 3 , this computer device 500 includes a processor 502, a memory, and a communication interface 505 connected through a communication bus 501. Among them, the memory can include a storage medium 503 and an internal memory 504.

[0073] The storage medium 503 can store an operating system 5031 and a computer program 5032. When the computer program 5032 is executed, it can cause the processor 502 to execute the radio station searching method for digital signal broadcasting. Among them, the storage medium 503 can be a volatile storage medium or a non-volatile storage medium.

[0074] The processor 502 is used to provide computing and control capabilities to support the operation of the entire computer device 500.

[0075] The internal memory 504 provides an environment for the operation of the computer program 5032 in the storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can be caused to execute a channel search method for digital signal broadcasting.

[0076] The communication interface 505 is used for network communication, such as providing the transmission of data information, etc. Those skilled in the art can understand that Figure 3 the structure shown in is only a block diagram of some structures related to the solution of the present invention, and does not constitute a limitation on the computer device 500 to which the solution of the present invention is applied. Specifically, the computer device 500 may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0077] Among them, the processor 502 is used to run the computer program 5032 stored in the memory to implement the corresponding functions in the above-mentioned channel search method for digital signal broadcasting.

[0078] Those skilled in the art can understand that Figure 3 the embodiments of the computer device shown in do not constitute a limitation on the specific composition of the computer device. In other embodiments, the computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements. For example, in some embodiments, the computer device may only include a memory and a processor. In such an embodiment, the structures and functions of the memory and the processor are the same as those in Figure 3 the shown embodiment and will not be elaborated here.

[0079] It should be understood that in the embodiments of the present invention, the processor 502 may be a central processing unit (CPU), and the processor 502 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0080] In another embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium can be a volatile or non-volatile computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps included in the above-described channel search method for digital signal broadcasting are implemented.

[0081] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the above-described devices, apparatuses, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein. Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described according to their functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0082] In several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. Units with the same function can also be aggregated into one unit. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces, devices, or units, and can also be electrical, mechanical, or other forms of connection.

[0083] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present invention.

[0084] In addition, the functional units in each embodiment of the present invention can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-integrated units can be implemented in the form of hardware or in the form of software functional units.

[0085] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned computer-readable storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), magnetic disks, or optical discs that can store program codes.

[0086] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A channel search method for digital signal broadcasting, characterized in that: The method comprises: Receive the channel search command input by the user, obtain the preset frequency range for signal search, and record the corresponding signal strength information; Perform signal strength screening on the frequency points within the frequency range according to the preset frequency screening rule and the signal strength information to obtain corresponding candidate frequency points; Eliminate the interference frequency points in the candidate frequency points according to the preset interference frequency point exclusion rule to obtain the corresponding valid frequency points; Decoding the digital signal of each effective frequency point according to a preset decoding rule and obtaining the carrier-to-noise ratio of the decoded signal; According to the carrier-to-noise ratio, an effective frequency point matching a preset carrier-to-noise ratio interval is acquired as a program frequency point and stored in a preset radio program sequence.

2. The channel searching method for digital signal broadcasting according to claim 1, characterized in that: The performing signal strength screening on the frequency points within the frequency range according to the preset frequency screening rule and the signal strength information to obtain corresponding candidate frequency points includes: Determine whether the signal strength of each frequency point in the signal strength information is less than the signal strength threshold in the frequency screening rule; A frequency point whose signal strength is less than the signal strength threshold is obtained as a candidate frequency point.

3. The channel searching method for digital signal broadcasting according to claim 1, characterized in that: The step of eliminating interference frequencies from the candidate frequencies according to a preset interference frequency elimination rule to obtain corresponding valid frequencies includes: Determine the background frequency interval corresponding to each of the candidate frequencies according to the frequency offset value in the interference frequency exclusion rule; Obtaining broadband signal strength corresponding to the background frequency interval of each candidate frequency point in the signal strength information; Calculating the difference between the narrowband signal strength of the candidate frequency point and the corresponding broadband signal strength as the signal quality coefficient of the candidate frequency point; According to the coefficient interval set in the interference frequency exclusion rule, candidate frequency points whose signal quality coefficients are not within the coefficient interval are excluded, and the remaining candidate frequency points are obtained as valid frequency points.

4. The channel searching method for digital signal broadcasting according to claim 3, characterized in that: Before excluding the candidate frequency points whose signal quality coefficients are not within the coefficient interval according to the coefficient interval set in the interference frequency point exclusion rule, the method further includes: The coefficient interval in the interference frequency point exclusion rule is set accordingly according to the preset coefficient interval setting rule and the number of the candidate frequency points.

5. The channel searching method for digital signal broadcasting according to claim 1, characterized in that: The step of decoding the digital signal of each effective frequency point according to a preset decoding rule and obtaining the carrier-to-noise ratio of the decoded signal includes: Decoding the digital signal of each effective frequency point according to the decoding rule to obtain a corresponding decoded signal; Obtaining carrier power and noise power in the decoded signal; The carrier power and noise power of the effective frequency point are calculated according to the carrier-to-noise ratio calculation formula in the decoding rule to obtain the corresponding carrier-to-noise ratio.

6. The channel searching method for digital signal broadcasting according to claim 1, characterized in that: The acquiring, according to the carrier-to-noise ratio, effective frequency points matching the preset carrier-to-noise ratio interval as program frequency points and storing them in a preset radio program sequence includes: Acquire an effective frequency point whose carrier-to-noise ratio matches the carrier-to-noise ratio interval as a program frequency point; The program identifier corresponding to each of the program frequencies is obtained and stored in the radio program sequence.

7. The channel searching method for digital signal broadcasting according to claim 1 or 6, characterized in that: After obtaining the effective frequency points matching the preset carrier-to-noise ratio interval according to the carrier-to-noise ratio as program frequencies and storing them in the preset radio program sequence, the method further includes: Determining whether the carrier-to-noise ratio of each program frequency point in the radio program sequence is within a preset adjustment range; If the program frequency is within the adjustment interval, the program volume of the program frequency is adjusted according to preset adjustment parameters.

8. A channel search device for digital signal broadcasting, characterized in that: The device is used to execute the channel search method for digital signal broadcasting according to any one of claims 1 to 7, and the device includes: The signal strength information acquisition unit is used to receive a channel search instruction input by a user, obtain a preset frequency range for signal search, and record the corresponding signal strength information; A candidate frequency point acquisition unit, configured to perform signal strength screening on the frequency points within the frequency range according to a preset frequency screening rule and the signal strength information to obtain corresponding candidate frequency points; An effective frequency point acquisition unit, used to exclude interference frequency points in the candidate frequency points according to a preset interference frequency point exclusion rule to obtain a corresponding effective frequency point; A carrier-to-noise ratio acquisition unit, used to decode the digital signal of each effective frequency point according to a preset decoding rule and acquire the carrier-to-noise ratio of the decoded signal; The program frequency storage unit is used to obtain the effective frequency matching the preset carrier-to-noise ratio interval as the program frequency according to the carrier-to-noise ratio and store it in the preset radio program sequence.

9. A computer device, characterized in that: The device includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory, used to store computer programs; The processor is used to implement the steps of the channel searching method for digital signal broadcasting described in any one of claims 1 to 7 when executing the program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the channel searching method for digital signal broadcasting as claimed in any one of claims 1 to 7 are implemented.

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