CN-121037838-B - Privacy media signal control system based on mobile phone key switching

CN121037838BCN 121037838 BCN121037838 BCN 121037838BCN-121037838-B

Abstract

The invention relates to the technical field of privacy protection of mobile terminals, in particular to a privacy media signal control system based on mobile phone key switching. According to the invention, through fine combination of the direction change and the triggering interval of the mobile phone key level state, a key behavior sequence with time sequence characteristics is constructed, the triggering rhythm change state is identified by combining the time interval stability, the directivity and rhythm information of key operation are organized into a map structure with sequence numbers and track directions, the function instruction characteristics are associated with the number and the arrangement sequence of nodes, accurate analysis of user intention and implicit generation of the function instruction are realized, the instruction state is mapped to a media signal channel, the dynamic control and switching of an audio and video acquisition path are completed, and the concealment, response flexibility and execution autonomy of privacy control behaviors are effectively improved.

Inventors

LI ZIYIN
JIANG ZHENLIN
LIN XIYU

Assignees

温州艾奥智能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250924

Claims (8)

1. The privacy media signal control system based on mobile phone key switching is characterized in that the system comprises: The input recognition module acquires input level signal change caused by a mobile phone key, calls a rising edge and falling edge state switching recorder of an input monitoring circuit to mark the level state direction, detects a triggering moment corresponding to a marking time point, and generates a key triggering behavior sequence; The rhythm judging module extracts a plurality of continuous time intervals according to the key triggering behavior sequence, sequentially compares any three time intervals, marks as a stable rhythm group if the variation amplitude of the difference between the two time intervals is within a rhythm fluctuation limiting range, and generates a rhythm triggering section state identifier; The atlas construction module calls the sequence of the triggering direction and the time interval in the original key triggering behavior sequence based on the state identification of the rhythm triggering section, takes the combination of the triggering direction and the time interval which are arranged in sequence as a node, assigns a sequence number to the node, marks the operation track direction according to the triggering direction, and generates an operation track atlas structure; The instruction analysis module extracts the length of the node sequence and the span of the time interval according to the operation track map structure, matches the node sequence to a set functional instruction set, and executes matching action through the corresponding relation of the number of the nodes, the arrangement sequence and the level direction to generate a privacy control function identifier; The signal switching module invokes a preset control signal routing table by utilizing the privacy control function identifier, identifies the corresponding media signal control channel type, points to a power supply channel for video acquisition if the control signal is a camera control identifier, points to an audio acquisition channel if the control signal is a microphone control identifier, and issues a state turnover instruction to the audio acquisition channel to generate a media channel control state table; the media channel control state table comprises a control channel type, a channel state mark and a control command mark.
2. The privacy media signal control system based on mobile phone key switching according to claim 1, wherein the key triggering behavior sequence comprises a triggering interval value, a triggering direction mark and a triggering sequence number, the rhythm triggering segment state identifier comprises a rhythm cycle length, a rhythm stability level and a rhythm fluctuation range, the operation track map structure comprises a node sequence number, an operation direction identifier and a triggering time distribution, and the privacy control function identifier comprises a function instruction number, a function type classification and a control triggering condition.
3. The private media signal control system based on mobile phone key switching of claim 1, the input recognition module is characterized by comprising: The level change detection submodule acquires input level signal change caused by a mobile phone key, calls a continuous level signal sample in the input monitoring circuit, detects a jump position in a signal curve in a point-by-point scanning mode, extracts edge time when the change occurs, judges rising edge or falling edge attribute, and acquires edge switching time information; The level direction marking sub-module compares the amplitude difference of adjacent level change with a direction conversion reference value according to the edge switching time information, identifies the direction state of real-time change, assigns the identified direction attribute to a time node, and acquires a level direction marking sequence; and the triggering behavior sub-module records the time intervals of adjacent triggering events according to the level direction marking sequence, extracts time difference and direction pairs between continuous triggering pairs, calculates a time direction rhythm trend value and acquires a key triggering behavior sequence.
4. The privacy media signal control system of claim 3, wherein the cadence determination module comprises: The triggering interval recording submodule carries out difference value operation on time stamps triggered by the adjacent keys based on the key triggering behavior sequence, invokes time difference values in the continuous time interval sequence, eliminates time periods with abnormal triggering in the interval sequence, carries out numbering arrangement on the rest time periods according to the triggering sequence, and generates a triggering time interval sequence; the rhythm fluctuation calculation submodule sequentially extracts time interval data of any three sections of continuous numbers by adopting the trigger time interval sequence, respectively compares the front time interval difference value and the rear time interval difference value, records the variation amplitude between the difference values, judges whether the three sections of intervals meet the variation amplitude of the difference values within a limiting range according to a preset rhythm fluctuation limiting range threshold, marks a data set conforming to conditions, and generates a stable rhythm time set identification set; and the rhythm segment identification submodule carries out continuity detection on the rhythm time group sequence according to the stable rhythm time group identification set, acquires a time segment interval meeting continuous arrangement of time groups, counts the number of the stable rhythm time groups in the continuous interval, and generates a rhythm trigger segment state identification.
5. The privacy media signal control system of claim 4, wherein the profile construction module comprises: the rhythm trigger analysis submodule identifies state points in a time period based on the state identification of the rhythm trigger segment, compares the adjacent changes of the state identification of the rhythm trigger segment, acquires trigger time sequence boundary points among rhythm segments, sequentially arranges the trigger boundary points, and establishes a rhythm segment trigger boundary sequence; The trigger sequence mapping submodule invokes the rhythm segment trigger boundary sequence, extracts a direction value and a time interval in a corresponding time segment, establishes a direction interval pair sequence, and combines the rhythm segment number to carry out orderly mapping to generate a time sequence direction interval mapping result; And the track graph spectrum sub-module sequentially numbers the nodes corresponding to the trigger direction according to the time sequence direction interval mapping result, constructs a directional connection relation among the nodes, calculates track intensity index values of the nodes, marks the connection path direction according to the track intensity index values and the node connection sequence and acquires an operation track graph structure according to the number sequence.
6. The private media signal control system based on mobile phone key switching of claim 5, the method is characterized in that the instruction analysis module comprises the following steps: The track node extraction submodule reads node track information based on the operation track map structure, acquires the arrangement sequence of node sequences in an operation path through index traversal, counts the number of the node sequences as the length of the node sequences, acquires time stamps corresponding to start and stop nodes, records time interval spans corresponding to the node sequences and generates a track sequence structure parameter set; The node sequence matching submodule invokes the track sequence structural parameter set, sequentially selects three indexes of node sequence length, time interval span and arrangement sequence, combines level direction information among nodes, compares node quantity defined by a preset instruction, node sequence and level direction matching information, adopts a sequence consistency check and direction logic consistency judgment mode, executes item-by-item comparison operation, screens functional instruction items meeting all matching conditions, and generates a matching functional instruction identification set; And the function identification pointing sub-module carries out reverse index on the function type associated with the instruction identification according to the matched function instruction identification set, establishes the mapping relation between the instruction identification and the function item, selects the function identification item associated with the real-time track sequence, and generates the privacy control function identification.
7. The privacy media signal control system of claim 1, wherein the signal switching module comprises: the control channel identification submodule invokes the privacy control function identifier, reads media signal control channel information corresponding to the function identifier in a preset control signal routing table, divides the media signal control channel information into a camera control identifier and a microphone control identifier according to the identifier type, identifies the control channel type according to the type of the identifier, and locates a corresponding video acquisition power supply channel item in the routing table if the control channel identification is the camera control identifier, and locates a corresponding audio acquisition channel item if the control channel identification is the microphone control identifier, so as to generate a control channel type mapping result; And the media channel switching sub-module judges whether the control channel is an audio acquisition channel according to the mapping result of the control channel type, if the control channel is the audio acquisition channel, a state turning instruction is issued to the control interface, the real-time on-off state of the channel is subjected to the reverse operation, the channel on-off state is updated, the corresponding relation between the real-time state and the channel type is recorded, and a media channel control state table is generated.
8. The system of claim 7, wherein the step of issuing a status flip command to the control interface includes invoking status flip control logic based on real-time on-off status information in an audio acquisition path item recorded in the control channel type mapping result after determining that the control channel is an audio acquisition path, and generating a control signal command for closing the audio acquisition path when the real-time on-off status information is an on-state; When the real-time on-off state information is in an off state, generating a control signal instruction for opening an audio acquisition channel; The process of recording the corresponding relation between the real-time state and the channel type comprises the steps of establishing a mapping relation between the real-time state information of the audio acquisition channel after the execution of the control signal instruction and the channel type indicated in the audio acquisition channel item, and storing the mapping relation into a media channel control state table.

Description

Privacy media signal control system based on mobile phone key switching Technical Field The invention relates to the technical field of privacy protection of mobile terminals, in particular to a privacy media signal control system based on mobile phone key switching. Background The technical field of mobile terminal privacy protection relates to a technical means for identifying, controlling and protecting user privacy information in mobile communication equipment, and core matters comprise management and control of application authority, monitoring of data access behaviors, desensitization processing of privacy information, and identification and interception of suspicious behaviors, and protection mechanisms of sensitive contents including personal images, voice, positioning data and the like of users, and the mobile terminal privacy protection is a whole set of systematic privacy protection framework which is developed at multiple levels at an operating system level, an application level and a communication link level. The traditional privacy media signal control system is a mechanism for managing rights of media signals such as image acquisition signals, audio acquisition signals or screen recording signals in a mobile terminal, aims at controlling leakage risk of user privacy at a media signal level, and is used for completing the control task in a traditional mode by means of static rights limitation on camera calling behaviors, foreground state detection on microphone calling, prompt and blocking on screen recording behaviors through an operating system notification mechanism and the like. In the prior art, static limitation or foreground state monitoring is mainly carried out by relying on an operating system authority system, the operation is easy to fail when a user interaction path is limited or an application environment is invisible, particularly, calling behaviors of a microphone and a camera are difficult to realize real-time interception under a screen extinction or background state, so that the problem of passive hysteresis in privacy protection exists. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides a privacy media signal control system based on mobile phone key switching. In order to achieve the above purpose, the present invention adopts the following technical scheme that the privacy media signal control system based on mobile phone key switching comprises: The input recognition module acquires input level signal change caused by a mobile phone key, calls a rising edge and falling edge state switching recorder of an input monitoring circuit to mark the level state direction, detects a triggering moment corresponding to a marking time point, and generates a key triggering behavior sequence; The rhythm judging module extracts a plurality of continuous time intervals according to the key triggering behavior sequence, sequentially compares any three time intervals, marks as a stable rhythm group if the variation amplitude of the difference between the two time intervals is within a rhythm fluctuation limiting range, and generates a rhythm triggering section state identifier; the map construction module calls the triggering direction and interval sequence in the original key triggering behavior sequence based on the state identification of the rhythm triggering section, sequentially arranges the triggering direction values and the corresponding time intervals, assigns sequence numbers to the nodes and marks the direction of the operation track, and generates an operation track map structure; and the instruction analysis module extracts the length of the node sequence and the span of the time interval according to the operation track map structure, matches the node sequence to a set functional instruction set, and executes matching action through the corresponding relation of the number of the nodes, the arrangement sequence and the level direction to generate the privacy control function identifier. As a further scheme of the invention, the key triggering behavior sequence comprises a triggering interval value, a triggering direction mark and a triggering sequence number, the state mark of the rhythm triggering section comprises a rhythm period length, a rhythm stability grade and a rhythm fluctuation range, the operation track map structure comprises a node sequence number, an operation direction mark and a triggering time distribution, and the privacy control function mark comprises a function instruction number, a function type classification and a control triggering condition. As a further aspect of the present invention, the input recognition module includes: The level change detection submodule acquires input level signal change caused by a mobile phone key, calls a continuous level signal sample in the input monitoring circuit, detects a jump position in a signal curve in a point-by-point scanning mode, extracts edge time when the change