CN113760785A - Data buffer area management method and system - Google Patents
Data buffer area management method and system Download PDFInfo
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- CN113760785A CN113760785A CN202010496714.1A CN202010496714A CN113760785A CN 113760785 A CN113760785 A CN 113760785A CN 202010496714 A CN202010496714 A CN 202010496714A CN 113760785 A CN113760785 A CN 113760785A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0866—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches for peripheral storage systems, e.g. disk cache
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/16—Sound input; Sound output
- G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
Abstract
An embodiment of the present invention mainly aims to provide a data buffer management method, including the following steps: detecting the size relation between the data quantity currently stored in the buffer area and a preset threshold value; recording the current detection number value; and adjusting the sampling rate according to the current detection frequency value. Correspondingly, the embodiment of the invention also provides a data buffer area management system. By the technical scheme provided by the embodiment of the invention, the interaction times during the communication between at least two wireless devices can be effectively reduced.
Description
Technical Field
The present application relates to data processing and management technologies, and in particular, to a method and a system for managing a data buffer.
Background
In the prior art, in wireless data transmission of electronic devices, such as bluetooth communication transmission, for example, bluetooth TWS, bluetooth CSB or other wireless communication, a technology for data buffering is required, and an important technology in data buffering is buffer management. Taking the example that the audio data of the mobile phone and the bluetooth headset are transmitted through bluetooth, when the bluetooth headset is connected to play music or perform a call, although the two headsets (the main and auxiliary headsets) have the same sampling rate, the audio CLK of the headsets on both sides also has slight deviation due to slight difference of hardware crystal oscillator frequency of the main and auxiliary headsets, and the slight deviation can become inconsistent playing speeds on both sides after a long playing time. If the bluetooth headset does not adjust the play speed of the bluetooth headset, two extreme problems can occur to the data sent by the mobile phone: the buffer holding the data overflows or the buffer is empty. The current approach to this problem is to use a common buffer adjustment: setting a buffer zone threshold, reading the data volume btdata _ length of the current buffer zone, if btdata _ length > threshold, adjusting the playing speed fast, if btdata _ length < threshold, adjusting the playing speed slow. The existing adjusting mode has the following problems that the data sent by the mobile phone is not uniform in speed and small in fluctuation, so the adjusting mode is frequent, the pace of two main and auxiliary Bluetooth earphones of the TWS needs to be ensured to be consistent, when one earphone is adjusted, a packet needs to be sent to tell the other earphone, so the transmission burden and bandwidth consumption between the two earphones are increased, and the normal playing is influenced under the extreme condition.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a method for managing a data buffer, which can effectively reduce the number of interactions between at least two wireless devices.
The embodiment of the invention is realized in such a way that a data buffer management method comprises the following steps:
detecting the size relation between the data quantity currently stored in the buffer area and a preset threshold value;
recording the current detection number value;
and adjusting the sampling rate according to the current detection frequency value.
Further, the recording the current detection time value includes:
when the currently stored data volume is larger than a preset threshold value, adding 1 to the current detection number value;
and when the currently stored data amount is less than a preset threshold value, subtracting 1 from the current detection time value.
Further, the adjusting the sampling rate according to the current detection time value includes:
when the current detection number value is larger than the preset maximum detection number, the sampling rate is increased;
and when the current detection number value is smaller than the preset minimum detection number, reducing the sampling rate.
Further, the predetermined maximum number of detections and the predetermined minimum number of detections are provided with predetermined upper and lower limits.
Further, the sampling rate includes N stages of speed adjustments, where the N stages of speed adjustments include a speed level Lx closest to a standard sampling rate, where N > x > 0.
Further, the method further comprises: the trend of the change of the data amount is judged,
when the trend of change of the data amount is from being smaller than the predetermined threshold value to being closer to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: directly adjusting the sampling rate to a speed level closest to a standard sampling rate;
when the trend of change of the data amount is from greater than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: the sample rate is adjusted directly to the speed level closest to the standard sample rate.
Further, the N-stage speed regulation is 8-stage speed regulation, namely L0-L7, the speed level Lx closest to the standard sampling rate is L3,
when the trend of change of the data amount is from being smaller than the predetermined threshold value to being closer to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: directly adjusting the sampling rate to L3;
when the trend of change of the data amount is from greater than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: the sampling rate is directly adjusted to L3.
According to another aspect of the embodiments of the present invention, an embodiment of the present invention further provides a data buffer management system, which can effectively reduce the number of interactions during communication between at least two wireless devices.
The embodiment of the present invention is implemented as follows, and a data buffer management system includes:
the detection device is used for detecting the size relation between the data quantity currently stored in the buffer area and a preset threshold value;
recording means for recording the current detection count value;
and the adjusting device is used for adjusting the sampling rate according to the current detection frequency value.
Further, the recording apparatus includes a counting unit configured to add 1 to a current detection count value when the currently stored data amount is larger than a predetermined threshold; or for subtracting 1 from the current detection count value when said current amount of stored data is smaller than a predetermined threshold.
Further, the adjusting device further comprises:
the acceleration unit is used for increasing the sampling rate when the current detection number value is greater than the preset maximum detection number;
and the speed reduction unit is used for reducing the sampling rate when the current detection number value is less than the preset minimum detection number.
According to the technical scheme, the embodiment of the invention has the following effects: the technical scheme is not specific to a specific application scene, and can be applied to data alignment of buffers for at least two wireless devices or at least two wired devices and two places in a Bluetooth, Bluetooth TWS, Bluetooth CSB or other wireless communication scenes; the playing speed is adjusted by controlling the detection times, so that the problem of frequent adjustment brought by fluctuation of a buffer area is avoided, and the interaction between at least two communication devices is reduced; setting an upper limit and a lower limit of detection times, wherein the upper limit can avoid too long time interval adjustment, and the lower limit can make quick adjustment response with low delay in time under the condition of ensuring normal transmission bandwidth of at least two earphones; in the process of adjusting the playing speed, the change trend of the buffer area is judged, and the playing speed which is closest to the sampling rate is directly adjusted, so that the situation that the data volume of the buffer area continuously rises or continuously probes downwards when returning to the normal water level can be avoided.
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Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a flow chart illustrating a data buffer management method provided herein;
fig. 2 shows a system block diagram of a data buffer management system provided in the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments, and the order of steps in the following embodiments is merely illustrative and can be modified without conflict.
As shown in fig. 1, it is a flowchart of a data buffer management method provided in an embodiment of the present invention, and the method includes the following steps:
s101, detecting the size relation between the data volume currently stored in the buffer area and a preset threshold value;
s102, recording a current detection number value;
s103, adjusting the sampling rate according to the current detection frequency value.
Specifically, the relation between the data volume of the current storage tape in the buffer area of the device and the preset threshold value is detected, the current detection time value is recorded, and the sampling frequency of the device is adjusted according to the current detection time value so as to achieve the purpose of adjusting the playing speed. The purpose of adjusting the sampling rate is to adjust the playing speed, and actually, the sampling rate is adjusted, that is, the sampling rate is increased or decreased on the basis of the standard sampling rate, the adjustment range is 0.02% -0.2% of the standard sampling rate, the playing speed is accelerated by increasing the sampling rate, and the playing speed is reduced by reducing the sampling rate. Recording the current detection time value specifically comprises: when the currently stored data volume is larger than a preset threshold value, adding 1 to the current detection number value; and when the currently stored data amount is less than a preset threshold value, subtracting 1 from the current detection time value. Adjusting the sampling rate according to the current detection time value comprises: when the current detection number value is larger than the preset maximum detection number, the sampling rate is increased; and when the current detection number value is smaller than the preset minimum detection number, reducing the sampling rate. The preset maximum detection times and the preset minimum detection times are provided with preset upper limit values and preset lower limit values.
This object is achieved by controlling the current detection number cur _ check _ count, wherein each time the relationship between the amount of data currently stored in the buffer and the predetermined threshold is detected, the current detection number is changed, and the current detection number cur _ check _ count is recorded, and if the amount of data stream _ length stored in the current buffer is greater than the predetermined threshold stream _ threshold, then cur _ check _ count is incremented by 1; if the amount of data stream _ length stored in the current buffer is less than a predetermined threshold, stream _ threshold, then cur _ check _ count is decremented by 1. The playback speed is increased when cur _ check _ count is greater than a set maximum detection count max _ check _ count, and the playback speed is decreased when cur _ check _ count is less than a maximum detection count min _ check _ count. In the embodiment of the invention, as the playing speed is symmetrical, the maximum detection times and the minimum detection times are set to be in a positive-negative value symmetrical relation, so that the symmetry of the playing speed is ensured, and other maximum detection times and other minimum detection times can be set in the design process.
The present invention provides an embodiment, for example, detecting a size relationship between a currently stored data amount in a buffer in a bluetooth sub-headset and a predetermined threshold, and detecting a number of times of the size relationship between the currently stored data amount and the predetermined threshold, where the current data amount is a data amount sent by a bluetooth main headset and is fluctuant, for example, a current data amount stream _ length is 7900, a set predetermined threshold stream _ threshold is 8000, stream _ threshold is a fixed value, which indicates an amount of bluetooth audio data that is expected to be stored in the buffer when a system is designed, for example, 8000 bytes, and stream _ length is currently stored bluetooth audio data, and this value may be required to be adjusted when the system is designed, and the currently stored data amount is smaller than the predetermined threshold, then a currently detected sub-number cur _ check _ count is decreased by 1; if the current data amount is 8100 and the current stored data amount is greater than the predetermined threshold, then the current detection count value is incremented by 1. And circularly detecting and updating the current detection time value when the playing is performed, wherein the current detection time value is clear 0 after the sampling rate is correspondingly adjusted after the times are met, and continuously detecting. When the current detection count value curcheck count is greater than the predetermined maximum detection count max check count or less than the predetermined minimum detection count min check count, the playback speed is increased or decreased accordingly, the predetermined maximum detection count and the predetermined minimum detection count are adjusted according to the current data amount stream _ threshold, and the adjustment range is between high count and low count. The adjustment range is set to keep the amount of buffer data at a low level, and if the predetermined maximum number of detection max check count is fixed, it may not wait until the start of the adjustment because the buffer has no data to play back and is stuck. Therefore, a predetermined upper limit value high _ count and a predetermined lower limit value low _ count of the predetermined maximum detection times max _ check _ count need to be set, the upper limit value is set to avoid too long adjustment time intervals, and the lower limit value is set to ensure that adjustment responses can be made in time under the condition that normal transmission bandwidths of at least two earphones are ensured.
The present invention provides another embodiment in which the sampling rate is adjusted according to the current detection count value, and in general, the sampling rate may be designed to include N stages of speed adjustments, where the N stages of speed adjustments include a speed level Lx closest to the standard sampling rate, where N > x > 0. An embodiment is provided, the N-stage speed adjustment is 8-stage speed adjustment, which is L0-L7, the speed level Lx closest to the standard sampling rate is L3, different ICs have different speed adjustment levels, and can be set according to different scenes and requirements, generally, the adjustment range is 0.02% -0.2% of the standard sampling rate
The present invention provides another embodiment, on the basis of all the foregoing embodiments, further comprising, before the step of adjusting the sampling rate according to the current detection time value, a step of determining a change trend of a data amount in the buffer, and when the change trend of the data amount is from less than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection time value comprises: directly adjusting the sampling rate to a speed level closest to a standard sampling rate; when the trend of change of the data amount is from greater than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: the sample rate is adjusted directly to the speed level closest to the standard sample rate.
Taking the above-mentioned 8-level speed adjustment as an example, of the playing speeds of several levels L0-L7, L3 is the speed closest to the real sampling rate, and when the trend of the change of the data amount is from less than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: directly adjusting the sampling rate to L3; when the trend of change of the data amount is from greater than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: the sampling rate is directly adjusted to L3. Specifically, when the data amount stream _ length of the buffer approaches the predetermined threshold value stream _ threshold, the trend of the change of the data amount in the buffer is determined, and if the data amount is from less than the predetermined threshold value stream _ threshold to the predetermined threshold value stream _ threshold, the level is directly adjusted to L3 level speed instead of from L0, L1, L2 to L3 when the data amount approaches the predetermined threshold value stream _ threshold, and similarly, when the data amount is from greater than the predetermined threshold value stream _ threshold to the predetermined threshold value stream _ threshold, the level is also adjusted to L3 instead of L7, L6, L5, L4 to L3 when the data amount approaches stream _ threshold, so that the design can avoid that the data amount in the buffer continues to rise or continue to return to the normal level when the data amount in the buffer continues to rise or continue to return to the normal level.
According to another aspect of the embodiments of the present invention, an embodiment of the present invention further provides a data buffer management system, which can effectively reduce the number of interactions during communication between at least two wireless devices.
The embodiment of the present invention is implemented as follows, and as shown in fig. 2, a block diagram of a data buffer management system 2 provided in the embodiment of the present invention includes:
detecting means 201 for detecting the size relationship between the currently stored data amount of the buffer and a predetermined threshold;
a recording device 202, configured to record a current detection count value;
and an adjusting device 203, configured to adjust a sampling rate according to the current detection time value.
Specifically, the management system detecting device 2 is used for detecting the magnitude relation between the data amount of the current storage tape in the buffer area of the device and the predetermined threshold, recording the current detection times value by using the recording device 202, and adjusting the sampling frequency of the device by the adjusting device 203 according to the current detection times value so as to achieve the purpose of adjusting the playing speed. The purpose of adjusting the sampling rate is to adjust the playing speed, and actually, the sampling rate is adjusted, that is, the sampling rate is increased or decreased on the basis of the standard sampling rate, the adjustment range is 0.02% -0.2% of the standard sampling rate, the playing speed is accelerated by increasing the sampling rate, and the playing speed is reduced by reducing the sampling rate.
In another embodiment of the present invention, the recording apparatus 202 further includes a counting unit 2021, configured to add 1 to a current detection count value when the currently stored data amount is greater than a predetermined threshold; or for subtracting 1 from the current detection count value when said current amount of stored data is smaller than a predetermined threshold.
In another embodiment of the present invention, the adjusting device 203 further includes: an acceleration unit 2031 configured to increase the sampling rate when the current detection count value is greater than a predetermined maximum detection count; a speed reducing unit 2032 configured to reduce the sampling rate when the current detection count value is less than a predetermined minimum detection count. The preset maximum detection times and the preset minimum detection times are provided with preset upper limit values and preset lower limit values.
The present invention provides an embodiment, for example, detecting the magnitude relation between the currently stored data amount of the buffer in the bluetooth sub-headset and a predetermined threshold, detecting means detecting the magnitude relation between the currently stored data amount and the predetermined threshold and recording the number of times by recording means, the current data amount, which is the data amount sent by the bluetooth master earphone, may fluctuate, for example, the current data amount stream _ length is 7900, the set predetermined threshold value stream _ threshold is 8000, stream _ threshold is a fixed value, which represents the amount of bluetooth audio data, such as 8000 bytes, that is desired to be stored in the buffer when the system is designed, and stream _ length is the currently stored bluetooth audio data, the value can be adjusted as required during design, and if the detection device detects that the currently stored data amount is smaller than a preset threshold value, a counting unit in the recording device subtracts 1 from a currently detected numerical value cur _ check _ count; if the current data amount is 8100, the detection device detects that the currently stored data amount is larger than the preset threshold value, the counting unit in the recording device adds 1 to the current detection time value. And when the playing is performed, circularly detecting and updating the current detection time value, adjusting the sampling rate correspondingly after the times are met, clearing 0 from the current detection time value, and continuing to detect. When the current detection count value curcheck count is greater than the predetermined maximum detection count max check count or less than the predetermined minimum detection count min check count, the playback speed is increased or decreased accordingly, the predetermined maximum detection count and the predetermined minimum detection count are adjusted according to the current data amount stream _ threshold, and the adjustment range is between high count and low count. The adjustment range is set to keep the amount of buffer data at a low level, and if the predetermined maximum number of detection max check count is fixed, it may not wait until the start of the adjustment because the buffer has no data to play back and is stuck. Therefore, a predetermined upper limit value high _ count and a predetermined lower limit value low _ count of the predetermined maximum detection times max _ check _ count need to be set, the upper limit value is set to avoid the adjustment time interval from being too long, and the lower limit value is set to enable timely adjustment response under the condition that normal transmission bandwidths of at least two earphones are ensured. The sampling frequency of the equipment is adjusted by the adjusting device according to the current detection number value recorded by the recording device, so that the aim of adjusting the playing speed is fulfilled.
The embodiments related to the product device part in the embodiments of the present invention have been described in detail in the above method flows, and are not repeated in this part.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A data buffer management method, comprising:
detecting the size relation between the data quantity currently stored in the buffer area and a preset threshold value;
recording the current detection number value;
and adjusting the sampling rate according to the current detection frequency value.
2. The data buffer management method of claim 1, wherein the recording the current detection time value comprises:
when the currently stored data volume is larger than a preset threshold value, adding 1 to the current detection number value;
and when the currently stored data amount is less than a preset threshold value, subtracting 1 from the current detection time value.
3. The data buffer management method of claim 2, wherein the adjusting the sampling rate according to the current detection time value comprises:
when the current detection number value is larger than the preset maximum detection number, the sampling rate is increased;
and when the current detection number value is smaller than the preset minimum detection number, reducing the sampling rate.
4. A data buffer management method according to any of claims 1 to 3, wherein the predetermined maximum number of detections and the predetermined minimum number of detections are provided with predetermined upper and lower limits.
5. A method for data buffer management according to any of claims 1 to 3, wherein the sampling rate comprises N stages of speed adjustments, where the N stages of speed adjustments comprise a speed level Lx closest to a standard sampling rate, where N > x > 0.
6. The data buffer management method of claim 5, wherein the method further comprises: the trend of the change of the data amount is judged,
when the trend of change of the data amount is from being smaller than the predetermined threshold value to being closer to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: directly adjusting the sampling rate to a speed level closest to a standard sampling rate;
when the trend of change of the data amount is from greater than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: the sample rate is adjusted directly to the speed level closest to the standard sample rate.
7. The data buffer management method of claim 6, wherein the N-level speed adjustment is 8-level speed adjustment, L0-L7, respectively, the speed level Lx closest to the standard sampling rate is L3,
when the trend of change of the data amount is from being smaller than the predetermined threshold value to being closer to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: directly adjusting the sampling rate to L3;
when the trend of change of the data amount is from greater than the predetermined threshold value to the predetermined threshold value, the adjusting the sampling rate according to the current detection number value includes: the sampling rate is directly adjusted to L3.
8. A data buffer management system, comprising:
the detection device is used for detecting the size relation between the data quantity currently stored in the buffer area and a preset threshold value;
recording means for recording the current detection count value;
and the adjusting device is used for adjusting the sampling rate according to the current detection frequency value.
9. The data buffer management device according to claim 8, wherein the recording device further comprises a counting unit operable to add 1 to a current detection count value when the currently stored data amount is larger than a predetermined threshold; or for subtracting 1 from the current detection count value when said current amount of stored data is smaller than a predetermined threshold.
10. The data buffer management method of claim 9, wherein the adjusting means further comprises:
the acceleration unit is used for increasing the sampling rate when the current detection number value is greater than the preset maximum detection number;
and the speed reduction unit is used for reducing the sampling rate when the current detection number value is less than the preset minimum detection number.
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