CN110620943B - Control method and device based on multimedia interface - Google Patents
Control method and device based on multimedia interface Download PDFInfo
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- CN110620943B CN110620943B CN201910877278.XA CN201910877278A CN110620943B CN 110620943 B CN110620943 B CN 110620943B CN 201910877278 A CN201910877278 A CN 201910877278A CN 110620943 B CN110620943 B CN 110620943B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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Abstract
The invention discloses a control method and device based on a multimedia interface, and belongs to the technical field of communication. The invention can record the real-time information received and sent by the intermediate equipment in real time through the information form, and generate the corresponding credible information based on the real-time information, thereby realizing the identification of the credibility of the real-time information, and after the intermediate equipment collects the event information, if the intermediate equipment does not receive the end information, the corresponding switching information can be sent according to the current credible information type in the information form, so that the intermediate equipment can maintain the transmission channel before collecting the event information, the transmission state between the intermediate equipment and the upstream equipment and the downstream equipment is ensured, the situation that the intermediate equipment selects the wrong information due to collecting the event information is avoided, and the effective processing capacity and the compatibility of the intermediate equipment to the event information are improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a control method and apparatus based on a multimedia interface.
Background
With the rapid development of High definition multimedia interface (HDMI-HDMI High definition multimedia interface) electronic products in recent years, Consumer Electronics Control (CEC-Consumer Electronics Control) has become popular. The electronic products such as televisions, power amplifiers, DVD players, AV receivers, streaming media adapters and the like can be interconnected by adopting HDMI. CEC, as an adjunct protocol to HDMI, may support the transfer of commands and the exchange of routing information between devices. The CEC is based on bus-based message transmission, and a plurality of devices are connected by HDMI lines to form a CEC network. In a CEC network, 3 types of devices are included: upstream devices (e.g., Source devices), intermediate devices (e.g., Switch devices), and downstream devices (e.g., Sink devices). Generally, a Video (Audio) and Audio (Video) data stream of an upstream device may be output to a downstream device through an intermediate device; the downstream device may also transmit a video data stream to the intermediate device. The intermediate device is used as an intermediate bridge to open a path between the upstream device and the downstream device, realizes a transmission selection function, and plays a role of a router. The current transmission channel of the intermediate device determines the data flow selection and direction of the whole network, and is important for a multi-level connected CEC network. However, since the types of CEC devices on the market are numerous, the design standards are different in layers, and message mechanisms for triggering selection of the intermediate device are different, when the intermediate device is connected to different devices, and upstream devices or downstream devices on different paths may trigger selection of a transmission channel in the middle, the intermediate device may perform transmission selection again, and may finally stay on an incorrect channel, which causes abnormal CEC network functions and seriously affects user experience.
At present, for CEC network anomalies, the existing technical solution usually filters continuous messages related to anomalies or damaged devices according to a trusted list with a preset priority, and can solve the problem of wrong selection of intermediate devices due to device anomalies to a certain extent. But cannot solve the situation of the intermediate device selection error caused by the trusted device when some conventional events (such as a restart event, a standby wakeup event, a hot plug event, etc.) occur, and cannot solve the situation of the intermediate device selection error caused by the downstream device changing (such as switching different models or brands of downstream devices).
In summary, the existing intermediate device has the problems that the conventional event cannot be effectively processed and the compatibility is poor.
Disclosure of Invention
Aiming at the problems that the conventional event can not be effectively processed by the conventional intermediate equipment and the compatibility is poor, the control method based on the multimedia interface, which aims at effectively processing the conventional event by the intermediate equipment and has good compatibility, is provided.
The invention provides a control method based on a multimedia interface, which comprises the following steps:
s1, presetting an event state form and an information form, wherein event data of a preset event is recorded in the event state form, and the information form is used for storing a real-time message sent and/or received by an intermediate device and a trusted message corresponding to the real-time message;
s2, the intermediate equipment judges whether event information is acquired, if so, step S3 is executed, and if not, step S7 is executed;
s3, the intermediate device updates preset event data corresponding to the event information in the event state form according to the event information and stores the sent or received message into the information form;
s4, the intermediate equipment judges whether end information corresponding to the event information is received within preset time, if yes, step S5 is executed; if not, go to step S6;
s5, the intermediate equipment updates preset event data corresponding to the end information in the event state form according to the end information, and returns to execute the step S2;
s6, the intermediate device sends a corresponding switching message according to the type of the current trusted message in the event state form, switches a transmission channel according to the switching message, and returns to execute the step S2;
and S7, the intermediate equipment generates a trusted message corresponding to the real-time information according to the currently sent or received real-time message.
Preferably, the preset events in the event state form include a first event and a second event;
the event data corresponding to the first event comprises: at least one first start factor, at least one first end factor, and first state data, the first state data including an active state and a dormant state;
the event data corresponding to the second event comprises: at least one second start factor, at least one second end factor, and second state data, the second state data including an active state and a dormant state.
Preferably, the first event includes at least one of a restart event, a standby wakeup event, and a hot plug event.
Preferably, the second event includes at least one of an abnormal cycle event and a message scrambling code event.
Preferably, the trusted message is:
and before the intermediate equipment does not acquire the event information, the intermediate equipment sends or receives a real-time message.
Preferably, in step S3, the step of updating, by the intermediate device, preset event data corresponding to the event information in the event state form according to the event information, and storing the sent or received message in the information form includes:
when the event information belongs to a first event, the intermediate device modifies corresponding first state data in the event state form from a dormant state to an active state according to the event information, stores the sent or received current real-time message into the information form, and generates a trusted message according to the real-time message sent or received by the intermediate device before the intermediate device collects the event information;
when the event information belongs to a second event, the intermediate device modifies corresponding second state data in the event state form from a dormant state to an active state according to the event information, stores the sent or received current real-time message into the information form, and generates a trusted message according to the real-time message sent or received by the intermediate device before the intermediate device collects the event information.
Preferably, in step S5, the step of updating, by the intermediate device according to the end information, preset event data corresponding to the end information in the event state form includes:
when the end information belongs to a first event, the intermediate device modifies the corresponding first state data in the event state form from an active state to a dormant state according to the end information;
and when the event information belongs to a second event, the intermediate device modifies the corresponding first state data in the event state form from an active state to a dormant state according to the event information.
Preferably, the types of the trusted message include: trusted audio messages and trusted video messages.
Preferably, in step S6, the step of sending, by the intermediate device, a corresponding switching message according to the type of the current trusted message in the event state form, and switching a transmission channel according to the switching message includes:
when the trusted message is a trusted audio message, the intermediate device sends a message for switching audio according to the current trusted audio message in the event state form, and the current transmission channel of the intermediate device is switched to an audio transmission channel;
and when the trusted message is a trusted video message, the intermediate device sends a message for switching the video according to the current trusted video message in the event state form, and the current transmission channel of the intermediate device is switched to a video transmission channel.
The invention also provides a control device based on the multimedia interface, which is applied to the intermediate equipment and comprises the following components:
a communication unit for transmitting and/or receiving a message;
the device comprises a first storage unit, a second storage unit and a third storage unit, wherein the first storage unit is used for storing an event state form, and event data of a preset event are recorded in the event state form;
the second storage unit is used for storing an information form, and the information form stores the real-time message sent and/or received by the communication unit and a trusted message corresponding to the real-time message;
the monitoring unit is used for monitoring whether event information is acquired or not;
the processing unit is used for updating preset event data corresponding to the event information in the event state form in the first storage unit according to the event information when the event information is collected, and is also used for updating the preset event data corresponding to the end information in the event state form in the first storage unit according to the end information;
the judging unit is used for judging whether end information corresponding to the event information is received within preset time or not;
the switching unit is used for sending a corresponding switching message according to the type of the current credible message in the event state form and switching a transmission channel according to the switching message when receiving end information corresponding to the event information within preset time;
and the generating unit is used for generating a trusted message corresponding to the real-time information according to the real-time message currently sent or received by the communication unit and sending the trusted message to the second storage unit.
The beneficial effects of the above technical scheme are that:
according to the technical scheme, the real-time information received and sent by the intermediate equipment can be recorded in real time through the information form, the corresponding credible information is generated based on the real-time information, the credibility of the real-time information is identified, and after the intermediate equipment collects the event information, if the end information is not received, the corresponding switching information can be sent according to the current credible information type in the information form, so that the intermediate equipment can maintain a transmission channel before the event information is collected, the transmission state between the intermediate equipment and the upstream equipment and between the intermediate equipment and the downstream equipment is ensured, the situation that the intermediate equipment selects wrongly because the event information is collected is avoided, and the effective processing capacity and compatibility of the intermediate equipment on the event information are improved.
Drawings
FIG. 1 is a flowchart of a method of an embodiment of a multimedia interface-based control method of the present invention;
fig. 2 is a block diagram of an embodiment of a multimedia interface-based control apparatus according to the present invention.
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 the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1, the present invention provides a control method based on a multimedia interface, comprising the following steps:
s1, presetting an event state form and an information form, wherein event data of a preset event is recorded in the event state form, and the information form is used for storing a real-time message sent and/or received by an intermediate device and a trusted message corresponding to the real-time message;
the intermediate device switches the transmission channel based on the trusted message in actual work. The real-time messages stored in the information form are messages sent and received by the intermediate device, the information form can record the file information of the intermediate device, and the consistency of the credible information of the intermediate device during the period from the beginning to the end of the preset event can be ensured. The jump of the intermediate equipment caused by the occurrence of the preset event is avoided.
The messages in the routing control message list belonging to the real-time message in the embodiment mainly include: the method comprises the steps that an upstream device (such as the upstream device which is currently in an active state or the upstream device which is currently in an inactive state) generates an off-broadcasting message, a downstream device generates an off-broadcasting message, an intermediate device locally broadcasts a switching message (such as the intermediate device is triggered to realize the broadcast switching message), and an intermediate device locally broadcasts the switching message (the switching message comprises a physical address) under the condition of multi-cascade. The real-time message includes interface parameters of the sending device to facilitate the intermediate device to switch transmission channels according to the interface parameters.
It should be noted that: the preset events in the event state form can comprise a first event and a second event; the first event comprises at least one of a restart event, a standby wakeup event and a hot plug event. The event data corresponding to the first event comprises: at least one first start factor, at least one first end factor, and first state data, the first state data including an active state and a dormant state; the second event comprises at least one of an abnormal cycle event and a message scrambling code event. The event data corresponding to the second event comprises: at least one second start factor, at least one second end factor, and second state data, the second state data including an active state and a dormant state.
In practical application, the intermediate device is a Switch device in a CEC network, the intermediate device has at least one input channel (e.g., a bluetooth input channel, a USB input channel, an ARC input channel, etc.) and one output channel, the intermediate device is connected to an upstream device (e.g., a set-top box, a DVD, etc.) through the input channel, and the intermediate device is connected to a downstream device (e.g., a tv set of different model or brand) through the output channel. The audio and video data of the upstream device can be transmitted to the downstream device through the intermediate device, and at the moment, the intermediate device must work on the input channel corresponding to the upstream device; the video data stream of the downstream device can also be output to the intermediate device through the ARC to realize sound playing, and the intermediate device works in the ARC input channel at the moment. The channel switching of the intermediate device can be realized manually, and can be realized automatically through CEC messages. The control message (e.g., CEC message) received by the intermediate device may be from an upstream device or may be from a downstream device.
S2, the intermediate equipment judges whether event information is acquired, if so, step S3 is executed, and if not, step S7 is executed;
analyzing the collected event information by using the intermediate device in step S2, determining whether the event information is a start factor of a preset event in the event state form, and if so, executing step S3; if not, step S7 is executed.
Further, in order to improve the accuracy of the control of the intermediate device, in step S2, the collected event information may be analyzed by the intermediate device, and it is determined whether the event information is at least two start factors in a preset event in the event state form, if yes, step S3 is executed; if not, step S7 is executed.
S3, the intermediate device updates preset event data corresponding to the event information in the event state form according to the event information and stores the sent or received message into the information form;
further, the step S3 includes:
when the event information belongs to a first event, the intermediate device modifies corresponding first state data in the event state form from a dormant state to an active state according to the event information (a first start factor), stores the sent or received current real-time message into the information form, and generates a trusted message according to the real-time message sent or received by the intermediate device before the intermediate device collects the event information;
in step S3, when the intermediate device collects the first event, it indicates that the intermediate device is currently in a reboot event, a standby wakeup event, or a hot plug event, during which a real-time message received/sent by the intermediate device may cause triggering among the intermediate device, the upstream device, and the downstream device, and the real-time message has an error, so that during this period, a trusted message generated by the real-time message sent or received by the intermediate device last time before the intermediate device does not collect the event information is used as the trusted message, thereby avoiding the intermediate device from operating on an unexpected transmission channel due to a jump.
It should be noted that: when the intermediate device does not acquire the event information, state data (including first state data and second state data) corresponding to preset events (including first events and second events) in the event state form are in a dormant state.
When the event information belongs to a second event, the intermediate device modifies corresponding second state data in the event state form from a dormant state to an active state according to the event information (a second start factor), stores the sent or received current real-time message into the information form, and generates a trusted message according to the real-time message sent or received by the intermediate device before the intermediate device collects the event information.
In step S3, when the intermediate device collects the second event, it indicates that the intermediate device is currently in an abnormal cycle event or a message scrambling event, during the above event, the real-time message received/sent by the intermediate device may cause triggering among the intermediate device, the upstream device and the downstream device, and the real-time message has an error, so that during this period, the trusted message generated by the real-time message sent or received by the intermediate device before the intermediate device collects no event information is used as the trusted message, and the intermediate device is prevented from operating on an unexpected transmission channel due to a jump.
S4, the intermediate equipment judges whether end information corresponding to the event information is received within preset time, if yes, step S5 is executed; if not, go to step S6;
in step S4, the middleware determines whether an end factor (i.e., end information) corresponding to the event information is received within a predetermined time, and if so, performs step S5; if not, go to step S6;
further, in order to improve the accuracy of the middleware control, step S4 may further use the middleware to determine whether two or more end factors corresponding to the event information are received within a preset time (i.e., end information), and if yes, perform step S5; if not, go to step S6.
S5, the intermediate equipment updates preset event data corresponding to the end information in the event state form according to the end information, and returns to execute the step S2;
further, the step S5 includes:
when the end information belongs to a first event, the intermediate device modifies the corresponding first state data in the event state form from an active state to a dormant state according to the end information, and returns to execute the step S2;
and when the event information belongs to a second event, the intermediate device modifies the corresponding first state data in the event state form from an active state to a dormant state according to the event information, and returns to execute the step S2.
S6, the intermediate device sends a corresponding switching message according to the type of the current trusted message in the event state form, switches a transmission channel according to the switching message, and returns to execute the step S2;
it should be noted that: the types of the trusted message include: trusted audio messages and trusted video messages.
Further, the step S6 includes:
when the trusted message is a trusted audio message, the intermediate device sends a message for switching audio according to the current trusted audio message in the event state form, and the current transmission channel of the intermediate device is switched to an audio transmission channel;
specifically, if the trusted message corresponding to the last real-time message in the event state form before the event information is received by the intermediate device is an audio message, and no end information is received within a preset time after the event information is collected by the intermediate device, the intermediate device broadcasts an audio switching message to a CEC network (including an upstream device and a downstream device), and the intermediate device switches the current transmission channel to an audio transmission channel. Therefore, consistency of the trusted information of the intermediate equipment from the beginning to the end of the preset event is realized, and jump of the intermediate equipment caused by the occurrence of the preset event is avoided.
And when the trusted message is a trusted video message, the intermediate device sends a message for switching the video according to the current trusted video message in the event state form, and the current transmission channel of the intermediate device is switched to a video transmission channel.
Specifically, if the trusted message corresponding to the last real-time message in the event state form before the event information is received by the intermediate device is a video message, and no end information is received within a preset time after the event information is collected by the intermediate device, the intermediate device broadcasts a message for switching videos to a CEC network (including an upstream device and a downstream device), and the intermediate device switches the current transmission channel to a video transmission channel. Therefore, consistency of the trusted information of the intermediate equipment from the beginning to the end of the preset event is realized, and jump of the intermediate equipment caused by the occurrence of the preset event is avoided.
And S7, the intermediate equipment generates a trusted message corresponding to the real-time information according to the currently sent or received real-time message.
In this step, the trusted message refers to a real-time message that is sent or received by the intermediate device before the event information is not collected by the intermediate device.
In this embodiment, before the intermediate device does not acquire the event information, the real-time message sent or received by the intermediate device is the trusted message. After the intermediate device collects the event information, the trusted information of the intermediate device does not change due to the real-time information sent or received by the intermediate device from the beginning to the end of the preset event, and the intermediate device is prevented from jumping due to the occurrence of the preset event.
In this embodiment, the real-time information received and sent by the intermediate device may be recorded in real time through the information form, and a corresponding trusted message may be generated based on the real-time information, so as to identify the trustworthiness of the real-time information, and after the intermediate device collects the event information, if the end message is not received, the intermediate device may send a corresponding switching message according to the current trusted message type in the information form, so that the intermediate device may maintain a transmission channel before collecting the event information, ensure a transmission state between the intermediate device and the upstream device and the downstream device, avoid a situation that the intermediate device has a selection error due to collecting the event information, and improve effective processing capability and compatibility of the intermediate device for the event information.
In practical application, the intermediate device sends the corresponding switching message according to the type of the current trusted message in the event state form, so that the condition that the intermediate device selection error occurs in a preset event due to the fact that the intermediate device is accessed to HDMI CEC devices (such as downstream devices) of different brands is eliminated, the compatibility and the stability of a CEC network are enhanced, various functional abnormalities caused by the compatibility of the CEC network are reduced, and the user experience degree is improved.
As shown in fig. 2, the present invention further provides a control device based on a multimedia interface, which is applied in an intermediate device, and includes:
a communication unit for transmitting and/or receiving a message;
the device comprises a first storage unit, a second storage unit and a third storage unit, wherein the first storage unit is used for storing an event state form, and event data of a preset event are recorded in the event state form;
the second storage unit is used for storing an information form, and the information form stores the real-time message sent and/or received by the communication unit and a trusted message corresponding to the real-time message;
the monitoring unit is used for monitoring whether event information is acquired or not;
the processing unit is used for updating preset event data corresponding to the event information in the event state form in the first storage unit according to the event information when the event information is collected, and is also used for updating the preset event data corresponding to the end information in the event state form in the first storage unit according to the end information;
the judging unit is used for judging whether end information corresponding to the event information is received within preset time or not;
the switching unit is used for sending a corresponding switching message according to the type of the current credible message in the event state form and switching a transmission channel according to the switching message when receiving end information corresponding to the event information within preset time;
and the generating unit is used for generating a trusted message corresponding to the real-time information according to the real-time message currently sent or received by the communication unit and sending the trusted message to the second storage unit.
In this embodiment, the first storage unit may record real-time information received and sent by the intermediate device in real time, the generation unit may generate a corresponding trusted message based on the real-time information, so as to identify the trustworthiness of the real-time information, and after the intermediate device collects the event information, if the end message is not received, the switching unit may send a corresponding switching message according to the current trusted message type in the information form, so that the intermediate device may maintain a transmission channel before collecting the event information, ensure a transmission state between the intermediate device and the upstream device and the downstream device, avoid a situation that the intermediate device has a selection error due to collecting the event information, and improve effective processing capability and compatibility of the intermediate device for the event information. The switching unit sends the corresponding switching message according to the type of the current trusted message in the event state form, so that the condition that the selection of the intermediate equipment is wrong due to the fact that different brands of HDMI CEC equipment (such as downstream equipment) are accessed is eliminated, the compatibility and the stability of the CEC network are enhanced, various functional abnormalities of the CEC network due to the compatibility are reduced, and the user experience degree is improved.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A control method based on a multimedia interface is characterized by comprising the following steps:
s1, presetting an event state form and an information form, wherein event data of a preset event is recorded in the event state form, and the information form is used for storing a real-time message sent and/or received by an intermediate device and a trusted message corresponding to the real-time message;
s2, the intermediate equipment judges whether event information is acquired, if so, step S3 is executed, and if not, step S7 is executed;
s3, the intermediate device updates preset event data corresponding to the event information in the event state form according to the event information and stores the sent or received message into the information form;
s4, the intermediate equipment judges whether end information corresponding to the event information is received within preset time, if yes, step S5 is executed; if not, go to step S6;
s5, the intermediate equipment updates preset event data corresponding to the end information in the event state form according to the end information, and returns to execute the step S2;
s6, the intermediate device sends a corresponding switching message according to the type of the current trusted message in the event state form, switches a transmission channel according to the switching message, and returns to execute the step S2;
and S7, the intermediate equipment generates a trusted message corresponding to the real-time information according to the currently sent or received real-time message.
2. The multimedia interface-based control method according to claim 1, wherein the preset events in the event status form include a first event and a second event;
the event data corresponding to the first event comprises: at least one first start factor, at least one first end factor, and first state data, the first state data including an active state and a dormant state;
the event data corresponding to the second event comprises: at least one second start factor, at least one second end factor, and second state data, the second state data including an active state and a dormant state.
3. The multimedia interface-based control method according to claim 2, wherein the first event comprises at least one of a restart event, a standby wakeup event, and a hot plug event.
4. The multimedia interface-based control method of claim 2, wherein the second event comprises at least one of an abnormal cycle event and a message scrambling code event.
5. The multimedia interface-based control method of claim 2, wherein the trusted message is:
and before the intermediate equipment does not acquire the event information, the intermediate equipment sends or receives a real-time message.
6. The multimedia interface-based control method according to claim 5, wherein in step S3, the step of the intermediate device updating preset event data corresponding to the event information in the event state form according to the event information and storing the sent or received message in the information form includes:
when the event information belongs to a first event, the intermediate device modifies corresponding first state data in the event state form from a dormant state to an active state according to the event information, stores the sent or received current real-time message into the information form, and generates a trusted message according to the real-time message sent or received by the intermediate device before the intermediate device collects the event information;
when the event information belongs to a second event, the intermediate device modifies corresponding second state data in the event state form from a dormant state to an active state according to the event information, stores the sent or received current real-time message into the information form, and generates a trusted message according to the real-time message sent or received by the intermediate device before the intermediate device collects the event information.
7. The multimedia interface-based control method according to claim 2, wherein in step S5, the step of updating, by the intermediary device according to the end information, the preset event data corresponding to the end information in the event status form includes:
when the end information belongs to a first event, the intermediate device modifies the corresponding first state data in the event state form from an active state to a dormant state according to the end information;
and when the event information belongs to a second event, the intermediate device modifies the corresponding first state data in the event state form from an active state to a dormant state according to the event information.
8. The multimedia interface-based control method of claim 1, wherein the type of the trusted message comprises: trusted audio messages and trusted video messages.
9. The multimedia interface-based control method according to claim 8, wherein in the step S6, the step of the intermediate device sending a corresponding switching message according to the type of the current trusted message in the event status form, and switching the transmission channel according to the switching message includes:
when the trusted message is a trusted audio message, the intermediate device sends a message for switching audio according to the current trusted audio message in the event state form, and the current transmission channel of the intermediate device is switched to an audio transmission channel;
and when the trusted message is a trusted video message, the intermediate device sends a message for switching the video according to the current trusted video message in the event state form, and the current transmission channel of the intermediate device is switched to a video transmission channel.
10. A control device based on a multimedia interface, applied to an intermediate device, is characterized by comprising:
a communication unit for transmitting and/or receiving a message;
the device comprises a first storage unit, a second storage unit and a third storage unit, wherein the first storage unit is used for storing an event state form, and event data of a preset event are recorded in the event state form;
the second storage unit is used for storing an information form, and the information form stores the real-time message sent and/or received by the communication unit and a trusted message corresponding to the real-time message;
the monitoring unit is used for monitoring whether event information is acquired or not;
the processing unit is used for updating preset event data corresponding to the event information in the event state form in the first storage unit according to the event information when the event information is collected, and is also used for updating the preset event data corresponding to the end information in the event state form in the first storage unit according to end information;
the judging unit is used for judging whether end information corresponding to the event information is received within preset time or not;
the switching unit is used for sending a corresponding switching message according to the type of the current credible message in the event state form and switching a transmission channel according to the switching message when receiving end information corresponding to the event information within preset time;
and the generating unit is used for generating a trusted message corresponding to the real-time information according to the real-time message currently sent or received by the communication unit and sending the trusted message to the second storage unit.
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| CN201910877278.XA CN110620943B (en) | 2019-09-17 | 2019-09-17 | Control method and device based on multimedia interface |
| PCT/CN2020/109394 WO2021052078A1 (en) | 2019-09-17 | 2020-08-14 | Control method and apparatus based on multimedia interface |
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