CN109525373B - Data processing method, data processing device and playing equipment - Google Patents
Data processing method, data processing device and playing equipment Download PDFInfo
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- CN109525373B CN109525373B CN201811595895.2A CN201811595895A CN109525373B CN 109525373 B CN109525373 B CN 109525373B CN 201811595895 A CN201811595895 A CN 201811595895A CN 109525373 B CN109525373 B CN 109525373B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/1245—Details of sampling arrangements or methods
Abstract
The invention discloses a data processing method, a data processing device and playing equipment, wherein the data processing method comprises the following steps: acquiring first data generated after the initial signal is transmitted; determining a transmission mode according to the continuity of the initial signal; and restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal. The technical scheme of the invention is beneficial to ensuring the reliability of signal transmission.
Description
Technical Field
The present invention relates to the field of data transmission technologies, and in particular, to a data processing method, a data processing apparatus, and a playing device.
Background
With the increasing demand for high-quality broadcasting, the sampling precision of the related signals is usually two bytes higher and lower at present. In the process of signal transmission, if the high byte is in front and the low byte is in back, the mode is a small-end transmission mode; if the low byte is before and the high byte is after, the transmission mode is the big-end transmission mode. However, when transmitting signals, the interference of noise in the environment and the like inevitably causes loss or change of a part of bytes, and at this time, the size of the received data changes, which causes signal transmission errors and reduces transmission reliability.
Disclosure of Invention
The invention mainly aims to provide a data processing method, which aims to solve the problem of transmission errors caused by the change of a received data size end due to interference and the like in the signal transmission process and improve the reliability of signal transmission.
In order to achieve the above object, the data processing method provided by the present invention comprises the following steps:
acquiring first data generated after the initial signal is transmitted;
determining a transmission mode according to the continuity of the initial signal;
and restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal.
Optionally, the step of acquiring first data generated after the initial signal is transmitted includes:
acquiring the initial signal;
sampling the initial signal according to preset sampling precision to obtain sampling data;
and transmitting the sampling data, and receiving the transmitted sampling data to obtain the first data.
Optionally, the step of determining a transmission mode according to the continuity of the initial signal includes:
keeping the relative sequence of each byte in the first data unchanged, and re-determining a sampling point according to the preset sampling precision to obtain second data, so that high bytes of the sampling point in the first data are low bytes of the sampling point in the second data, and low bytes of the sampling point in the first data are high bytes of the sampling point in the second data;
comparing the continuity of the sampling points in the first data with the continuity of the sampling points in the second data;
when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data, determining that the transmission mode is a large-end transmission mode;
and when the continuity of the sampling points in the first data is less than that of the sampling points in the second data, determining that the transmission mode is a small-end transmission mode.
Optionally, the step of keeping the relative order of bytes in the first data unchanged, re-determining sampling points according to the preset sampling precision to obtain second data, so that high bytes of the sampling points in the first data are low bytes of the sampling points in the second data, and low bytes of the sampling points in the first data are high bytes of the sampling points in the second data includes:
moving each byte in the first data forward or backward by a preset number of bytes to obtain second data;
the preset number is an odd number, and the preset sampling precision is an even number of bytes.
Optionally, the step of comparing the continuity of the sampling points in the first data with the continuity of the sampling points in the second data includes:
calculating the absolute value of the difference value of two adjacent sampling points in the first data, and recording the absolute value as a first difference value;
calculating the absolute value of the difference value of two adjacent sampling points in the second data, and recording the absolute value as a second difference value;
comparing the first difference value and the second difference value of two adjacent sampling points at each corresponding position;
accumulating the accumulated number of the first difference values which are larger than the second difference values in all the adjacent sampling points;
and comparing the cumulative number with the total logarithm of two adjacent sampling points.
Optionally, when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data, the step of determining that the transmission mode is a big-end transmission mode includes:
determining the transmission mode to be a big-end transmission mode when the accumulated number is less than 1/2 of the total logarithm;
when the continuity of the sampling points in the first data is less than the continuity of the sampling points in the second data, the step of determining that the transmission mode is the small-end transmission mode includes:
determining the transmission mode to be a small-end transmission mode when the cumulative number is greater than 1/2 of the total logarithm.
Optionally, the preset sampling precision is two bytes.
Optionally, the initial signal comprises an audio stream signal.
To achieve the above object, the present invention further provides a data processing apparatus, which includes a memory, a processor, and a data processing program stored on the memory and executable on the processor, and when executed by the processor, the data processing program implements the steps of a data processing method, the data processing method including the steps of: acquiring first data generated after the initial signal is transmitted; determining a transmission mode according to the continuity of the initial signal; and restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal.
To achieve the above object, the present invention further provides a playback device including a data processing apparatus, the data processing apparatus including a memory, a processor, and a data processing program stored in the memory and executable on the processor, the data processing program implementing the steps of the data processing method when executed by the processor, the data processing method including the steps of: acquiring first data generated after the initial signal is transmitted; determining a transmission mode according to the continuity of the initial signal; and restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal.
In the technical scheme of the invention, the data processing method comprises the following steps: acquiring first data generated after the initial signal is transmitted; determining a transmission mode according to the continuity of the initial signal; and restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal. The method comprises the steps of determining a transmission mode when an initial signal is transmitted according to the characteristic that the initial signal has continuity, and further reducing the initial signal according to first data generated by the transmission of the initial signal and the determined transmission mode to obtain a target signal, thereby effectively avoiding the influence of byte loss or change on the judgment of a large end and a small end caused by interference such as noise in the transmission process, enabling the target signal to be matched with the initial signal, improving the anti-interference performance and reliability of signal transmission, and improving the playing effect of corresponding content of the initial signal. In addition, the data processing method in the technical scheme of the invention can be completely realized through software improvement without adding or changing any hardware device, thereby being beneficial to keeping low cost in the data transmission process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram illustrating a data processing method according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating an initial signal in one embodiment of a data processing method according to the present invention;
FIG. 3 is a diagram illustrating a target signal in the case where the big-end transmission mode and the small-end transmission mode are confused in FIG. 2;
fig. 4 is a schematic diagram of sampling an initial signal in another specific example of the data processing method of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a data processing method, as shown in fig. 1, the data processing method includes the following steps:
step S100, acquiring first data generated after the initial signal is transmitted;
the initial signal may be any signal with continuity characteristics, and specifically may be an audio stream signal, a video stream signal, and the like. For an initial signal having a characteristic of continuity, when first data generated after it is transmitted is received, its transmission mode may be determined according to the continuity. Generally, the initial signal is transmitted in a digital manner, and if the initial signal itself is an analog signal, it is necessary to perform digital processing on the initial signal before transmission so as to transmit the initial signal, and the data received after transmission is the first data.
Step S200, determining a transmission mode according to the continuity of the initial signal;
the transmission mode of the signal comprises a large-end transmission mode and a small-end transmission mode. In the big-end transmission mode, data is sequentially processed as character strings with high bytes at the front and low bytes at the back; in the small-end transmission mode, the low byte is before, the high byte is after, the sequence of the transmission address and the data bit right are effectively combined, and the method is consistent with a common logic method. In order to ensure that the target signal finally obtained after transmission is consistent with the initial signal, the received data needs to be restored according to the transmission mode to obtain the target signal. However, during transmission, due to interference of noise and the like in the environment, it is likely that loss or change of bytes and the like occur, thereby causing confusion of data recovery. In a specific example, as shown in fig. 2 and fig. 3, the initial signal is a continuous audio stream signal, and if there is a loss or change of bytes during transmission, which results in an error in determining the size of the target signal during the reduction, the target signal obtained by the reduction will appear as a discontinuous noise signal, which does not correspond to the initial signal. In the present embodiment, in order to avoid the above situation, the initial signal is considered to be a signal having a continuity characteristic, so that the transmission mode is determined according to the continuity of the initial signal, and the target signal restored according to the determined transmission mode also satisfies the continuity characteristic, thereby ensuring the reliability of transmission.
And step S300, restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal.
And restoring the transmitted initial signal according to the received first data and the determined transmission mode to obtain a target signal. At this time, the target signal obtained by the restoration is basically consistent with the initial signal, so that the reliability of transmission is guaranteed. In the process of reducing and obtaining the target signal, optimization operations such as interpolation, filtering and the like can be carried out, so that the target signal is further improved, and the signal-to-noise ratio of the target signal is improved.
In this embodiment, the data processing method includes the steps of: acquiring first data generated after the initial signal is transmitted; determining a transmission mode according to the continuity of the initial signal; and restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal. The method comprises the steps of determining a transmission mode when an initial signal is transmitted according to the characteristic that the initial signal has continuity, and further reducing the initial signal according to first data generated by the transmission of the initial signal and the determined transmission mode to obtain a target signal, thereby effectively avoiding the influence of byte loss or change on the judgment of a large end and a small end caused by interference such as noise in the transmission process, enabling the target signal to be matched with the initial signal, improving the anti-interference performance and reliability of signal transmission, and improving the playing effect of corresponding content of the initial signal. In addition, the data processing method in the embodiment can be completely realized through software improvement, and any hardware device does not need to be added or changed, so that the low cost in the data transmission process is kept.
Further, step S100 includes:
step S110, acquiring an initial signal;
step S120, sampling the initial signal according to preset sampling precision to obtain sampling data;
step S130, transmitting the sampling data, and receiving the transmitted sampling data to obtain first data.
In this embodiment, the initial signal may be obtained from a signal source or other device, and may be a digital signal or an analog signal. When the initial signal is an analog signal or the initial signal is a digital signal but needs to be resampled again in order to save transmission resources and the like, the initial signal is sampled according to a preset sampling precision. As shown in fig. 4, in another specific example, assuming that the predetermined sampling precision is 16 bits, the partial sample data is as follows (where the first column is a row number and the predetermined sampling precision is two bytes):
in the 1000 th line example, 0x5bfc is one sample data and 0xf1fe is another sample data, however, during transmission, the data is transmitted according to 0x5b, 0xfc, 0xf1, 0 xfe. If one of the bytes is lost, e.g., 0xfc is lost, then the following sample data will change.
Further, step S200 includes:
step S210, keeping the relative sequence of each byte in the first data unchanged, and re-determining the sampling point according to the preset sampling precision to obtain second data, so that the high byte of the sampling point in the first data is the low byte of the sampling point in the second data, and the low byte of the sampling point in the first data is the high byte of the sampling point in the second data;
s220, comparing the continuity of the sampling points in the first data with the continuity of the sampling points in the second data;
step S231, when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data, determining that the transmission mode is a large-end transmission mode;
step S232, when the continuity of the sampling points in the first data is smaller than the continuity of the sampling points in the second data, determining that the transmission mode is a small-end transmission mode.
If the bytes are lost or changed during the transmission process, the size of the data may be changed. In this embodiment, on the premise of keeping the relative order of each byte in the first data unchanged, the sampling points are re-determined according to the preset sampling precision to obtain the second data, so that the high byte of the sampling point in the first data is the low byte of the sampling point in the second data, and the low byte of the sampling point in the first data is the high byte of the sampling point in the second data, that is, the size ends of the second data and the first data are switched, and the continuity of the sampling point in the first data and the continuity of the sampling point in the second data are further compared, so as to determine the transmission mode of the initial signal. When the initial signal is a signal having a characteristic of continuity, the greater continuity in the first data and the second data corresponds to the correct transmission mode. Specifically, when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data, the transmission mode is determined to be a large-end transmission mode; and when the continuity of the sampling points in the first data is less than that of the sampling points in the second data, determining that the transmission mode is a small-end transmission mode.
In another specific example, step S210 includes:
step S211, moving each byte in the first data forward or backward by a preset number of bytes to obtain second data;
the preset number is an odd number, and the preset sampling precision is an even number of bytes.
That is, the second data can be obtained simply and conveniently by shifting the number of bytes corresponding to each byte in the first data. For different predetermined sampling accuracies, the corresponding predetermined number may be selected so that the magnitude terminals in the second data and the magnitude terminals in the first data are interchanged. For example, for the first data corresponding to fig. 4, the sampling precision is preset to be two bytes, and after moving forward by a preset number of bytes to be one, the partial second data is obtained as follows:
further, step S220 includes:
step S221, calculating an absolute value of a difference value of two adjacent sampling points in the first data, and recording the absolute value as a first difference value;
suppose the ith sample point in the first data is aiThen, the absolute value of the difference between the ith pair of adjacent two sampling points is expressed as Xi ═ ai+1-ai|。
Step S222, calculating the absolute value of the difference value of two adjacent sampling points in the second data, and recording the absolute value as a second difference value;
suppose the ith sample point in the second data is biThen, the absolute value of the difference between the ith pair of adjacent sampling points is represented as Yi ═ bi+1-bi|。
Step S223, comparing a first difference value and a second difference value of two adjacent sampling points at each corresponding position;
i.e. the size of each Xi and Yi, specifically X1 and Y1, X2 and Y2, … …, up to XN and YN, respectively. N is the total logarithm of two connected sampling points and can be obtained by subtracting one from the total number of the sampling points.
Step S234, accumulating the accumulated number of the first difference value which is larger than the second difference value in all the adjacent two sampling points;
when Xi > Yi, then accumulate an accumulated number.
And S235, comparing the cumulative number with the total logarithm of two adjacent sampling points.
And determining the transmission mode of the big end and the small end by comparing the accumulated number with the total logarithm N of two adjacent sampling points.
Specifically, when the cumulative number is less than 1/2 of the total pairs, which indicates that the continuity of the first data is less than the continuity of the second data, i.e., the second data has better continuity, corresponding to the initial signal, the transmission mode is determined to be large-end transmission;
when the cumulative number is greater than 1/2 of the total logarithm, indicating that the continuity of the first data is greater than the continuity of the second data, i.e., the first data has better continuity, corresponding to the initial signal, the transmission mode is determined to be small-end transmission.
The invention also provides a data processing device, which comprises a memory, a processor and a data processing program stored on the memory and capable of running on the processor, wherein the data processing program realizes the steps of the data processing method when being executed by the processor.
The data processing program stored on the memory, when executed by the processor, performs the following operations:
acquiring first data generated after the initial signal is transmitted;
determining a transmission mode according to the continuity of the initial signal;
and restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal.
The operations of acquiring first data generated after the initial signal is transmitted when the data processing program stored in the memory is executed by the processor include:
acquiring an initial signal;
sampling the initial signal according to a preset sampling precision to obtain sampling data;
and transmitting the sampling data, and receiving the transmitted sampling data to obtain first data.
The operation of determining the transmission mode based on the continuity of the initial signal when the data processing program stored on the memory is executed by the processor includes:
keeping the relative sequence of each byte in the first data unchanged, and re-determining the sampling point according to the preset sampling precision to obtain second data, so that the high byte of the sampling point in the first data is the low byte of the sampling point in the second data, and the low byte of the sampling point in the first data is the high byte of the sampling point in the second data;
comparing the continuity of the sampling points in the first data with the continuity of the sampling points in the second data;
when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data, determining that the transmission mode is a large-end transmission mode;
and when the continuity of the sampling points in the first data is less than that of the sampling points in the second data, determining that the transmission mode is a small-end transmission mode.
When the data processing program stored in the memory is executed by the processor, the relative sequence of each byte in the first data is kept unchanged, the sampling point is re-determined according to the preset sampling precision to obtain the second data, the high byte of the sampling point in the first data is the low byte of the sampling point in the second data, and the operation that the low byte of the sampling point in the first data is the high byte of the sampling point in the second data comprises the following steps:
moving each byte in the first data forward or backward by a preset number of bytes to obtain second data;
the preset number is an odd number, and the preset sampling precision is an even number of bytes.
When the data processing program stored in the memory is executed by the processor, the operation of comparing the continuity of the sampling points in the first data with the continuity of the sampling points in the second data comprises the following operations:
calculating the absolute value of the difference value of two adjacent sampling points in the first data, and recording the absolute value as a first difference value;
calculating the absolute value of the difference value of two adjacent sampling points in the second data, and recording the absolute value as a second difference value;
comparing a first difference value and a second difference value of two adjacent sampling points at each corresponding position;
accumulating the accumulated number of the first difference value which is larger than the second difference value in all the adjacent sampling points;
and comparing the cumulative number with the total logarithm of two adjacent sampling points.
When the data processing program stored in the memory is executed by the processor, the operation of determining that the transmission mode is the big-end transmission mode when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data comprises:
when the cumulative number is less than 1/2 of the total logarithm, determining the transmission mode to be a big-end transmission mode;
when the continuity of the sampling points in the first data is less than the continuity of the sampling points in the second data, the step of determining the transmission mode as the small-end transmission mode includes:
when the cumulative number is greater than 1/2 of the total logarithm, the transmission mode is determined to be a small-end transmission mode.
When the data processing program stored in the memory is executed by the processor, the preset sampling precision is two bytes.
The initial signal comprises an audio stream signal when the data processing program stored on the memory is executed by the processor.
The present invention further provides a playing device, where the playing device includes a data processing apparatus, and the specific structure of the data processing apparatus refers to the foregoing embodiments, and since the playing device adopts all technical solutions of all the foregoing embodiments, the playing device at least has all beneficial effects brought by the technical solutions of the foregoing embodiments, and details are not repeated herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A data processing method, characterized in that the data processing method comprises the steps of:
acquiring first data generated after the initial signal is transmitted;
determining a transmission mode according to the continuity of the initial signal;
restoring the transmitted initial signal according to the first data and the transmission mode to obtain a target signal;
the step of determining a transmission mode according to the continuity of the initial signal comprises:
keeping the relative sequence of each byte in the first data unchanged, and re-determining a sampling point according to preset sampling precision to obtain second data, so that high bytes of the sampling point in the first data are low bytes of the sampling point in the second data, and low bytes of the sampling point in the first data are high bytes of the sampling point in the second data;
comparing the continuity of the sampling points in the first data with the continuity of the sampling points in the second data;
when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data, determining that the transmission mode is a large-end transmission mode;
and when the continuity of the sampling points in the first data is less than that of the sampling points in the second data, determining that the transmission mode is a small-end transmission mode.
2. The data processing method of claim 1, wherein the step of acquiring first data generated after the initial signal is transmitted comprises:
acquiring the initial signal;
sampling the initial signal according to preset sampling precision to obtain sampling data;
and transmitting the sampling data, and receiving the transmitted sampling data to obtain the first data.
3. The data processing method of claim 1, wherein the step of re-determining the sampling points according to the preset sampling precision to obtain the second data while keeping the relative order of the bytes in the first data unchanged, so that the high bytes of the sampling points in the first data are the low bytes of the sampling points in the second data, and the low bytes of the sampling points in the first data are the high bytes of the sampling points in the second data comprises:
moving each byte in the first data forward or backward by a preset number of bytes to obtain second data;
the preset number is an odd number, and the preset sampling precision is an even number of bytes.
4. The data processing method of claim 1, wherein the step of comparing the continuity of the sample points in the first data with the continuity of the sample points in the second data comprises:
calculating the absolute value of the difference value of two adjacent sampling points in the first data, and recording the absolute value as a first difference value;
calculating the absolute value of the difference value of two adjacent sampling points in the second data, and recording the absolute value as a second difference value;
comparing the first difference value and the second difference value of two adjacent sampling points at each corresponding position;
accumulating the accumulated number of the first difference values which are larger than the second difference values in all the adjacent sampling points;
and comparing the cumulative number with the total logarithm of two adjacent sampling points.
5. The data processing method of claim 4, wherein the step of determining that the transmission mode is a big-end transmission mode when the continuity of the sampling points in the first data is greater than the continuity of the sampling points in the second data comprises:
determining the transmission mode to be a big-end transmission mode when the accumulated number is less than 1/2 of the total logarithm;
when the continuity of the sampling points in the first data is less than the continuity of the sampling points in the second data, the step of determining that the transmission mode is the small-end transmission mode includes:
determining the transmission mode to be a small-end transmission mode when the cumulative number is greater than 1/2 of the total logarithm.
6. A data processing method as claimed in any one of claims 2 to 5, characterized in that the predetermined sampling precision is two bytes.
7. A data processing method as claimed in any one of claims 1 to 5, characterized in that the initial signal comprises an audio stream signal.
8. A data processing apparatus, characterized in that the data processing apparatus comprises a memory, a processor and a data processing program stored on the memory and executable on the processor, the data processing program, when executed by the processor, implementing the steps of the data processing method according to any one of claims 1 to 7.
9. A playback device, characterized in that the playback device comprises the data processing apparatus of claim 8.
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