TWI538494B - Multimedia information transmission system and method thereof - Google Patents

Description

Multimedia information transmission system and method thereof

The present invention relates to a method and system for transmitting multimedia information, and more particularly to a method and system for transmitting multimedia information transmitted through a high definition multimedia interface or a digital video interface.

With the advancement of multimedia audio-visual technology, people's lives are closely related to multimedia audio-visual technology. For example, multimedia audio-visual technology is used in environments such as teaching, surveillance, concerts, presentations, advertisements or video walls. Therefore, the multimedia audio-visual technology tends to It is applied to the above environment through a High Definition Multimedia Interface (HDMI) or a Digital Visual Interface (DVI). However, some multimedia control devices cannot control output devices such as digital televisions, displays, or projectors, or some multimedia hosts cannot connect devices such as a mouse and/or a keyboard, thereby causing inconvenience in use.

The present invention provides a multimedia information transmission system and a method thereof, wherein a multimedia host transmits a control signal to an output device through a display data message channel of a high-definition multimedia interface (or a digital video interface), thereby enhancing multimedia information. The efficiency and convenience of the transmission system.

The invention provides a multimedia information transmission system, which comprises a multimedia host, an output device and a manipulation device. The multimedia host includes a first processing unit, a coding unit and a transmission unit and a receiving unit, the coding unit is connected to the first processing unit and the transmission unit, and the first processing unit is coupled to the coding unit, the transmission unit and the receiving unit. The output device has a second processing unit, a decoding unit, a receiving unit and an output unit. The decoding unit is connected to the second processing unit and the receiving unit. The second processing unit is connected to the decoding unit, the receiving unit and the output unit, and the receiving unit transmits A transmission line is connected to the transmitting unit. The control unit is connected to the receiving unit of the multimedia host. When the control device transmits a control signal to the multimedia host, the multimedia host activates an asynchronous mechanism according to the control signal. In the non-synchronization mechanism, the coding unit controls the signal encoding, and the encoded control signal is transmitted through the sending unit. Entering a serial data transmission path of the data message channel and transmitting the data to the output device via the transmission line; wherein the receiving unit receives the encoded control signal from the serial data transmission path of the display data message channel, and the decoding unit encodes the encoded signal The signal is decoded to enable the second processing unit to control the output of the output unit according to the control signal.

The invention provides a multimedia information transmission method, which is suitable for a multimedia host, an output device and a control device. The multimedia host is connected to the output device through a transmission line, and the control device is connected to the multimedia host, and the transmission method comprises: the multimedia host determines whether to receive a Controlling the signal, if the judgment result is yes, the multimedia host starts an asynchronous mechanism; in the non-synchronization mechanism, a coding unit of the multimedia host will control the signal encoding; the encoded control signal passes through a transmitting unit of the multimedia host, Inputting a serial data transmission path of the data message channel and transmitting to the output device; a receiving unit of the output device receives the encoded control signal from the serial data transmission path of the display data message channel; and decoding of the output device The unit decodes the encoded control signal; and a second processing unit of the output device controls the output of an output unit according to the control signal.

In summary, the specific means of the present invention is a transmission system using multimedia information, including a multimedia host, an output device, and a manipulation device. The user outputs a control signal to the multimedia host through the control device, and the multimedia host activates an asynchronous mechanism according to the control signal, so that the clock signal is temporarily loaded into the display data. a clock signal transmission path of the message channel, and the encoded control signal is transmitted through the transmitting unit to load a serial data transmission path of the display data message channel, and is transmitted to the output device. Therefore, the output device controls the output unit according to the control signal. Output, thereby improving the efficiency and convenience of the transmission system of multimedia information.

The above summary and the following examples are intended to be illustrative of the invention and the embodiments of the invention.

1. 1a‧‧‧Multimedia information transmission system

10, 10a‧‧‧Multimedia host

100, 100a‧‧‧ first processing unit

102, 102a‧‧‧Send unit

104, 104a‧‧‧ coding unit

106, 106a‧‧‧ receiving unit

12, 12a‧‧‧ output device

120, 120a‧‧‧second processing unit

122, 122a‧‧‧ receiving unit

124, 124a‧‧‧ decoding unit

126, 126a‧‧‧Output unit

14, 14a‧‧‧ transmission line

16, 16a‧‧‧ control device

TMDS‧‧‧Minimized transmission differential signal channel

DDC‧‧‧Display data message channel

CEC‧‧‧ Consumer Electronic Control Signal Channel

Hot Plug Detect‧‧‧Hot Plug Detection Signal Channel

SDA‧‧‧ serial data transmission path

SCL‧‧‧ clock signal transmission path

S1‧‧‧Startup format

D1‧‧‧ data format

E1‧‧‧ stop format

FIG. 1 is a functional block diagram of a multimedia information transmission system according to an embodiment of the present invention.

2 is a schematic diagram of a display data message channel of a multimedia information transmission system according to another embodiment of the present invention.

FIG. 3 is a schematic functional block diagram of a multimedia information transmission system according to another embodiment of the present invention.

FIG. 4 is a flowchart of a method for transmitting multimedia information according to another embodiment of the present invention.

FIG. 5 is a flowchart of a method for transmitting multimedia information according to another embodiment of the present invention.

FIG. 1 is a functional block diagram of a multimedia information transmission system according to an embodiment of the present invention. Please refer to Figure 1. The multimedia data transmission system includes a multimedia host 10, an output device 12, and a control device 16. The multimedia host 10 is connected to the output device 12 via a transmission line 14, and the multimedia host 10 is connected to a control device 16 by wireless communication. For convenience of description, the multimedia host 10 of the present embodiment is a Blu-ray (BD) player, the output device 12 is a digital TV, and the manipulation device 16 is illustrated by a remote controller.

The multimedia host 10 can output a video signal and transmit it to the output device 12 via the transmission line 14 to enable the output device 12 to output the video signal. In addition, the user can input a control signal through the control device 16, and the control signal is Multi-media After the computing, encoding, and processing of the host computer 10 is transmitted to the output device 12 through the display data message channel DDC of the High Definition Multimedia Interface (HDMI), and then calculated, decoded, and processed by the output device 12, So that the output device 12 outputs the displayed content, sound or channel according to the manipulation signal.

In other embodiments, the multimedia host 10 is, for example, a storage media player such as a DVD, MP3, or MP4, a hard disk player, a game console, a notebook, or a computer. The output device 12 is, for example, a video output device such as a display, a projector, an LCD screen, or a speaker. The manipulation device 16 is, for example, one or a combination of a wireless mouse, a wireless keyboard, a wired mouse, a wired keyboard, and a remote controller. This embodiment does not limit the aspect of the multimedia host 10, the output device 12, and the manipulation device 16.

In detail, the multimedia host 10 has a first processing unit 100, an encoding unit 104, a transmitting unit 102, and a receiving unit 106. In practice, the first processing unit 100 is coupled to the encoding unit 104, the transmitting unit 102, and the receiving unit 106, and the encoding unit 104 is coupled to the sending unit 102 and the first processing unit 100. The transmitting unit 102 is electrically connected to the transmission line 14, and is further connected. The unit 106 can communicate wirelessly with the control device 16, wherein the receiving unit 106 is, for example, an infrared communication device, a Bluetooth communication device, a wireless local area network (Wireless LAN) communication device, a wireless personal network (Wireless PAN) communication device, and wireless fidelity. The Wi-Fi communicator or the ZigBee (802.15.4) communicator does not limit the aspect of the multimedia host 10 and the receiving unit 106.

The output device 12 has a receiving unit 122, a decoding unit 124, a second processing unit 120, and an output unit 126. In practice, the second processing unit 120 is coupled to the receiving unit 122, the decoding unit 124, and the output unit 126. The decoding unit 124 is coupled to the receiving unit 122 and the second processing unit 120, and the receiving unit 122 is electrically connected to the transmission line 14. The aspect of the output device 12 is not limited.

In practice, the sending unit 102 is, for example, a high-definition multimedia interface or a digital video interface for transmitting one or a combination of audio and video signals and control signals, and the receiving unit 122 is, for example, a high-definition multimedia interface or Digital video interface for receiving audio, video, and other audio and video signals Or a combination, wherein the transmission line 14 is coupled between the multimedia host 10 and the output device 12, and the transmission line 14 is designed according to the aspect of the transmitting unit 102 or the receiving unit 122. For convenience of description, the transmitting unit 102 and the receiving unit 122 are described as a high-definition multimedia interface, and the transmission line 14 is an electrical signal line having a high-definition multimedia interface. The embodiment does not limit the transmitting unit 102. The receiving unit 122 and the transmission line 14 are in the same manner.

In addition, the transmission line 14 has a Transition Minimized Differential Signaling (TMDS) channel, a Display Data Channel (DDC), a Consumer Electronics Control (CEC), and a heat. Plug and Detect Hot Channel Detect (HDP). Therefore, the video signal of the multimedia host 10 can be transmitted to the output device 12 through the transmission line 14, whereby the output device 12 can output the audio and video of the high definition multimedia interface. In other embodiments, the transmission line 14 is, for example, an electrical signal line of a digital video interface. This embodiment does not limit the aspect of the transmission line 14.

Further, the encoding unit 104 is, for example, one of a video encoder, a subtitle, a graphics encoder, a text encoder, an audio encoder, a disparity vector encoder, an asynchronous start-stop format encoder, and an asynchronous mechanism encoder. In combination, the embodiment does not limit the aspect of the encoding unit 104. On the other hand, the decoding unit 124 is, for example, one or a combination of a video decoder, a subtitle ‧ graphics decoder, a text decoder, an audio decoder, a disparity vector decoder, an asynchronous start and stop format encoder, and an asynchronous mechanism encoder. This embodiment does not limit the aspects of the encoding unit 104 and the decoding unit 124.

In addition, the first and second processing units 100 and 120 are, for example, audio/video processors, central processing units, or microprocessors for calculating, computing, or processing signals transmitted by the units, and the output unit 126 is, for example, a liquid crystal screen or a speaker. For outputting characters, patterns, images, or sounds, the embodiment does not limit the aspects of the first and second processing units 100, 120 and the output unit 126.

Generally, when the multimedia information transmission system 1 architecture is completed, the multimedia host 10 transmits a serial data transmission path through the display data message channel DDC. The SDA and the one-way signal transmission path SCL transmit the data signal and the time pulse signal in a synchronous coding format, wherein the data signal is simultaneously decoded according to the clock signal, so the multimedia host 10 can obtain an extended display identification data (Extended Display Identification Data, EDID), however, after the multimedia host 10 obtains the extended display identification information, the multimedia host 10 transmits the signal of the High Bandwidth Digital Content Protection (HDCP) at intervals of a few seconds to prevent the digital signal. , illegal copying of image data. Therefore, the data transmission amount of the display data message channel DDC is not large, and the present invention uses the serial data transmission path SDA of the display data message channel DDC to load the manipulation signal, thereby controlling the operation of the output device 12, or The output device 12 is caused to output a control signal such as a mouse pointer or a type of text according to the manipulation signal.

For example, when the user operates the control device 16 to adjust the brightness of the output device 12, the multimedia host 10 receives the control signal through the receiving unit 106, and the control signal is, for example, indicating the brightness of the output device 12. The first processing unit 100 initiates an asynchronous mechanism when the first processing unit 100 determines that the receiving unit 106 receives the control signal, wherein the non-synchronization mechanism indicates that the control signal is transmitted through the serial data transmission path SDA, or The mechanism by which the control signal is not transmitted through the clock signal transmission path SCL.

Therefore, the first processing unit 100 controls the encoding unit 104 to cause the encoding unit 104 to encode the manipulation signal in an asynchronous encoding format, and the encoded manipulation signal is transmitted through the transmitting unit 102 to load the serial data transmission path SDA, wherein the asynchronous encoding is performed. The format is, for example, an asynchronous start-stop format or a vendor-encoded format, and the receiving unit 122 receives the encoded control signal from the serial data transmission path SDA, and then the decoding unit 124 decodes the encoded control signal. Therefore, the second processing unit 120 can read and recognize the manipulation signal, so the second processing unit 120 controls the output of the output unit 126 according to the manipulation signal. In this way, the control device 16 of the present invention can adjust or control the brightness and display screen of the output device 12. The other characteristics or the sound size of the output device 12 do not limit the operation of the multimedia data transmission system in this embodiment.

2 is a schematic diagram of a display data message channel of a multimedia information transmission system according to another embodiment of the present invention. Please refer to Figure 2 and Figure 1. The display data message channel DDC between the sending unit 102 and the receiving unit 122 has a serial data transmission path SDA (Serial Data Line) and a clock signal transmission path SCL (Serial Clock Line), wherein the first processing unit 100 starts a non- The synchronization mechanism, therefore, the first processing unit 100 suspends outputting the clock signal to the clock signal transmission path SCL, and the encoded control signal is transmitted through the transmitting unit 102 to load the serial data transmission path SDA, wherein the encoded control signal can be It is divided into three sections: start format S1, data format D1, and stop format E1.

In detail, the start format S1 of the asynchronous start and stop coding format is that the ratio of the high logic level signal to the low logic level is 6 to 1; the data format D1 of the asynchronous start and stop coding format is the high logic level signal. The ratio to the low logic level is 3 to 1, and the ratio of the high logic level signal to the low logic level is 1 to 3. The data format D1 is 8-bit data, and the data format D1 can be based on The function of the output device 12 is set. For example, when the data of the 8-bit data is "11101000", the brightness of the screen of the output device 12 is adjusted, and when the data of the other 8 bits is "11111100", the sound size of the output device 12 is adjusted. In the technical field, the general knowledge person can freely design the data format D1 as needed; the stop format E1 of the non-synchronous start-stop coding format is a ratio of the high logic level signal to the low logic level of 9 to 1.

In addition, those skilled in the art have the freedom to design the startup format S1 and the stop format E1 as needed. For example, in the start-up format S1 of the asynchronous start-stop coding format, the ratio of the high logic level signal to the low logic level is 6 to 6; the stop format E1 of the non-synchronous start-stop coding format is the high logic level signal and the low logic. The ratio of the level is 10 to 1, wherein the startup format S1 and the stop format E1 are fixed formats that can be encoded and decoded by the encoding unit 104 and the decoding unit 124. For example, the encoding unit 104 and the decoding unit 124 start with "111111000000" each time. And each time with "11111111110" To stop, this embodiment does not limit the aspect of the asynchronous start and stop coding format.

It is to be noted that in other embodiments, the decoding unit 124 may omit the clock signal transmitted by the clock signal transmission path SCL of the data message channel DDC. In other words, the sending unit 102 transmits the serial data and the time pulse signal. The decoding unit 124 can ignore the clock signal. Therefore, the clock signal can be regarded as an inactive signal or an invalid signal by the decoding unit 124. Therefore, the decoding unit 124 For the decoding of the serial data, the embodiment does not limit the operation of the multimedia information transmission system 1.

FIG. 3 is a schematic functional block diagram of a multimedia information transmission system according to another embodiment of the present invention. Please refer to Figure 3 and Figure 1. The multimedia information transmission system 1a of the present embodiment is similar to the multimedia information transmission system 1 of the foregoing embodiment. For example, the multimedia information transmission system 1a can also pass the asynchronous mechanism so that the encoded control signal can be transmitted through the transmitting unit 102a. The serial data transmission path SDA is loaded, and the receiving control unit 122a receives the encoded control signal from the serial data transmission path SDA, whereby the output device 12a outputs the control signal.

However, there is still a difference between the present embodiment and the multimedia information transmission system 1a, 1 of the foregoing embodiment, in that the receiving unit 106a is, for example, a universal serial bus (USB), a mini universal serial bus (Mini USB). Or a micro universal serial bus (Micro USB), a Thunderbolt I/O or other port, so that the operating device 16a can be connected to the receiving unit 106a in a plug-in manner. In other embodiments, the receiving unit 106a is, for example, One or a combination of a wired communication port and a wireless communication port, the embodiment does not limit the aspect of the receiving unit 106a.

For convenience of description, the control device 16a of the embodiment is a wired keyboard, the multimedia host 10a is a computer, wherein the receiving unit 106a is a universal serial bus (USB), and the output device 12a is illustrated by a display. The aspect of the transmission system 1a of the multimedia information is not limited. In addition, the control signal is, for example, a signal of a general-purpose serial bus signal or a keyboard command. In other embodiments, the control signal is, for example, a signal of a mouse pointer or a signal of wireless communication. This embodiment does not limit the aspect of the control signal.

For example, the user operates the control device 16 such as a wired keyboard and inputs a control signal such as an "email address", wherein the control signal is transmitted to the multimedia host 10a, such as a computer, via the receiving unit 106a, the multimedia host 10a Through the specification of the universal serial bus (USB), it is judged that the control signal is received. Therefore, the multimedia host 10a starts the asynchronous mechanism so that the encoded control signal can be transmitted through the transmitting unit 102a to load the serial data transmission path SDA. And the receiving unit 122a receives the encoded control signal from the serial data transmission path SDA, whereby the control signal of the "email address" is displayed, for example, by the output device 12a of the display.

In addition to the above differences, those skilled in the art having reference to the above embodiments and the above differences should be easily inferred, and therefore will not be described herein.

FIG. 4 is a flowchart of a method for transmitting multimedia information according to another embodiment of the present invention. Please refer to Figure 4 and Figure 1. A multimedia information transmission method is suitable for a multimedia host 10, an output device 12, and a control device 16. The multimedia host 10 is connected to the output device 12 via a transmission line 14, and the control device 16 is connected to the multimedia host 10. The transmission method includes the following steps. In step S401, the multimedia host 10 determines whether to receive a manipulation signal. If the result of the determination in step S401 is YES, then the process proceeds to step S403, the multimedia host 10 initiates an asynchronous mechanism; or if the result of the determination in step S401 is negative, the process proceeds to step S402, and the multimedia host 10 executes a synchronization mechanism.

In practice, the multimedia information transmission method of the present invention utilizes a display data message channel DDC in a high-definition multimedia interface to perform a synchronization mechanism or an asynchronous mechanism, wherein in the asynchronous mechanism, the manipulation signal can transmit a data message. The serial data transmission path SDA in the channel DDC is transmitted to the output device 12, so that the second processing unit 120 controls the output of the output device 12 according to the manipulation signal; and in the synchronization mechanism, the display identification data or the high-frequency wide-digit content is expanded. The protection technology signal can be transmitted to the output device 12 through the clock signal transmission path SCL and the serial data transmission path SDA in the display data message channel DDC. In this way, the present invention can be used in a high-definition multimedia interface for transmitting video signals and control signals. Loss, this example does not limit the operational aspects of the multimedia information transmission method.

Further, in the asynchronous mechanism and in step S405, the multimedia host 10 suspends outputting a clock signal to a clock signal transmission path SCL of the display data message channel DDC. In practice, the display data message channel DDC has a clock signal transmission path SCL and a serial data transmission path SDA for connection between the transmitting unit 102 of the multimedia host 10 and the receiving unit 122 of the output device 12, wherein the clock signal is The signal used for synchronizing the delivery of the serial data, therefore, the present invention suspends outputting a clock signal to the clock signal transmission path SCL, thereby performing an asynchronous mechanism.

Next, in step S407, an encoding unit 104 encodes the manipulation signal in an asynchronous start-stop format. In step S409, the encoded control signal is transmitted through a transmitting unit 102 to load a serial data transmission path SDA of the display data message channel DDC and transmitted to the output device 12.

Then, in step S411, a receiving unit 122 receives the encoded control signal from the serial data transmission path SDA of the display data message channel DDC. In step S413, a decoding unit 124 decodes the encoded control signal in an asynchronous start-stop format. In practice, the encoding unit 104 encodes the control signal in the start format S1, the data format D1, and the stop format E1 of the asynchronous start and stop format, wherein the data format D1 indicates the uncoded control signal, for example, the control signal is “ The signal for adjusting the brightness of the screen output by the remote controller", therefore, the data format D1 is "the signal for adjusting the brightness of the screen is converted into a representative value of the binary". In addition, when the decoding unit 124 receives the startup format S1, the decoding unit 124 performs an asynchronous decoding format. When the decoding unit 124 receives the stop format E1, the decoding unit 124 performs a synchronous decoding format.

In step S415, the second processing unit 120 controls the output of an output unit 126 according to the manipulation signal.

In addition, when the determined result of step S401 is NO, in step S402, the multimedia host 10 performs a synchronization mechanism. In step S404, the multimedia host 10 transmits the clock signal transmission path SCL and the serial data through the display data message channel DDC. The transmission path SDA is used to transmit a signal that expands the display identification data or a high-bandwidth digital content protection technology. In addition to the above differences, those skilled in the art having reference to the above embodiments and the above differences should be easily inferred, and therefore will not be described herein.

FIG. 5 is a flowchart of a method for transmitting multimedia information according to another embodiment of the present invention. Please refer to Figure 5. The method for transmitting multimedia information in this embodiment is similar to the method for transmitting multimedia information in FIG. 4 of the foregoing embodiment. However, the method for transmitting multimedia information in this embodiment includes the following steps: In step S501, the multimedia host 10 determines whether a control signal is received. If the result of the determination in step S501 is YES, then step S503 is performed, and the multimedia host 10 starts a non-synchronization mechanism.

Then, step S505 and step S509 can be performed simultaneously after step S503. In step S505, the multimedia host 10 transmits a notification signal to the output device 12. In detail, in the asynchronous mechanism, the multimedia host 10 generates a notification signal according to the control signal, wherein the notification signal is, for example, a signal indicating that the output device 12 performs an asynchronous mechanism, thereby transmitting to the output device 12 to reach the notification output device. 12 Enter the power of the asynchronous mechanism.

In step S507, the output device 12 omits a clock signal transmitted by a clock signal transmission path SCL of the data message channel DDC according to the notification signal. In practice, after the output device 12 receives the notification signal, the output device 12 will initiate an asynchronous mechanism to receive the encoded control signal from the serial data transmission path SDA, and when the output device 12 receives the asynchronous start and stop format. When the format E1 is stopped, the output device 12 will return to the synchronization mechanism. In other words, the start time of the output device 12 in the non-synchronization mechanism is "the output device 12 receives the notification signal", and the output device 12 is in the non-synchronization mechanism. The stop time of the synchronization mechanism is "the output device 12 receives the stop format E1 in the asynchronous start and stop format", and during the above period, the output device 12 will omit or ignore the one-time signal transmitted by the clock signal transmission path SCL.

Thereafter, in step S509, an encoding unit 104 encodes the manipulation signal in an asynchronous start-stop format. In step S511, the encoded control signal is transmitted through a transmitting unit 102 to load a serial data transmission path SDA of the display data message channel DDC and transmitted to the output device 12.

Next, in step S513, a receiving unit 122 receives the encoded control signal from the serial data transmission path SDA of the display data message channel DDC. In step S515, a decoding unit 124 decodes the encoded control signal in an asynchronous start-stop format. Therefore, in step S517, the output unit 126 outputs a manipulation signal.

Further, if the decision result in the step S501 is NO, the multimedia host 10 starts a synchronization mechanism in the step S502. In step S504, the multimedia host 10 transmits a signal of the extended display identification data or a high-bandwidth digital content protection technology through the clock signal transmission path SCL and the serial data transmission path SDA of the display data message channel DDC.

It is worth mentioning that steps S505~S507 and steps S509~S511 can be operated at the same time, or steps S505~S507 and steps S509~S511 can be operated in sequence, for example, after step S505 is performed, then steps S509 and S507 are performed. Step S511, this embodiment does not limit the operation steps of the multimedia information transmission method. In addition to the above differences, those skilled in the art having reference to the above embodiments and the above differences should be easily inferred, and therefore will not be described herein.

In summary, the present invention is a multimedia information transmission system including a multimedia host, an output device, and a manipulation device. The user outputs a control signal to the multimedia host through the control device, and the multimedia host activates an asynchronous mechanism according to the control signal, so that the clock signal is temporarily loaded into a clock signal transmission path of the display data message channel, and the coded The control signal is transmitted through the transmitting unit to load a serial data transmission path of the display data message channel and transmitted to the output device, and the output device transmits the encoded control signal through the receiving unit, and transmits the encoded control through the decoding unit. Signal decoding, therefore, the second processing unit of the output device controls the output of the output unit according to the control signal, thereby enhancing the transmission of the multimedia information The efficiency and convenience of the transmission system. In addition, in the asynchronous mechanism, the multimedia host can output a notification message to the output device, so that the output device omits a clock signal transmitted by the clock signal transmission path of the data message channel, thereby achieving the function of controlling the output of the output unit. . In this way, the multimedia information transmission system of the present invention improves the convenience of operation.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

1‧‧‧Multimedia information transmission system

10‧‧‧Multimedia host

100‧‧‧First Processing Unit

102‧‧‧Send unit

104‧‧‧ coding unit

106‧‧‧Receiving unit

12‧‧‧ Output device

120‧‧‧Second processing unit

122‧‧‧ receiving unit

124‧‧‧Decoding unit

126‧‧‧Output unit

14‧‧‧ transmission line

16‧‧‧Control device

TMDS‧‧‧Minimized transmission differential signal channel

DDC‧‧‧Display data message channel

CEC‧‧‧ Consumer Electronic Control Signal Channel

Hot Plug Detect‧‧‧Hot Plug Detection Signal Channel

Claims (9)

A multimedia information transmission system, comprising: a multimedia host, comprising a first processing unit, a coding unit, a transmission unit and a receiving unit, the coding unit is connected to the first processing unit and the sending unit, the first processing unit The output unit has a second processing unit, a decoding unit, a receiving unit and an output unit, and the decoding unit is connected to the second processing unit and the receiving unit. The output unit is coupled to the encoding unit, the transmitting unit and the receiving unit. The second processing unit is connected to the decoding unit, the receiving unit and the output unit, and the receiving unit is connected to the sending unit through a transmission line; and a control device is connected to the receiving unit of the multimedia host; wherein, the control unit When the device transmits a control signal to the multimedia host, the multimedia host activates an asynchronous mechanism according to the control signal. In the non-synchronization mechanism, the coding unit encodes the control signal, and the encoded control signal is transmitted through the transmission. The unit loads a series of data transmission paths for displaying a data message channel, Transmitting to the output device via the transmission line; wherein the receiving unit receives the encoded control signal from the serial data transmission path of the display data message channel, and the decoding unit decodes the encoded control signal to enable the The second processing unit controls the output of the output unit according to the control signal, wherein the encoding unit encodes the control signal according to an asynchronous start-stop encoding format, and the decoding unit encodes the encoded signal according to an asynchronous start-stop decoding format. The control signal is decoded. The transmission system of the multimedia information according to claim 1, wherein the start format of the asynchronous start and stop coding format is a ratio of a high logic level signal to a low logic level of 6 to 1, and the asynchronous start and stop coding The stop format of the format is that the ratio of the high logic level signal to the low logic level is 9 to 1. The transmission system of multimedia information as described in claim 1 of the patent application, wherein In the non-synchronization mechanism, the first processing unit pauses outputting a clock signal to a clock signal transmission path of the display data message channel, or the decoding unit omits the transmission of the clock signal transmission path of the display data message channel. Clock signal. The transmission system of the multimedia information as described in claim 1, wherein the transmitting unit is a high-definition multimedia interface or a digital video interface, and the receiving unit is a high-definition multimedia interface or a digital video interface, and the receiving unit is One or a combination of a wired communication port and a wireless communication port. The multimedia information transmission system of claim 1, wherein the control device is one or a combination of a keyboard, a mouse and a remote controller, wherein the multimedia host is a hard disk player and a storage device. One of a media player, a game machine, a battery and a computer, the output device is one of a display, a projector, a digital television and a speaker. A multimedia information transmission method is suitable for a multimedia host, an output device and a control device. The multimedia host is connected to the output device through a transmission line, and the control device is connected to the multimedia host, and the transmission method comprises: the multimedia host determining Receiving a control signal, if the determination result is yes, the multimedia host starts an asynchronous mechanism; in the asynchronous mechanism, a coding unit of the multimedia host encodes the control signal according to an asynchronous start and stop coding format; The encoded control signal is transmitted through a transmitting unit of the multimedia host to load a serial data transmission path of the display data message channel and transmitted to the output device; a receiving unit of the output device displays the data from the output device The serial data transmission path of the message channel receives the encoded control signal; a decoding unit of the output device decodes the encoded control signal according to an asynchronous start-stop decoding format; and a second of the output device The processing unit controls an output according to the control signal The output of the unit. The method for transmitting multimedia information according to claim 6, wherein the step of the non-synchronization mechanism further comprises: the multimedia host suspending outputting a clock signal to a clock signal transmission path of the display data message channel. The method for transmitting multimedia information according to claim 6, wherein the step of the non-synchronization mechanism further comprises: the multimedia host transmitting a notification signal to the output device; and the output device is based on the notification signal A clock signal transmitted by a clock signal transmission path of the display data message channel is omitted. The method for transmitting multimedia information according to claim 7 or 8, wherein the multimedia host determines whether to receive a control signal, and if the determination result is no, the multimedia host performs a synchronization mechanism, in the synchronization mechanism. The multimedia host transmits the signal of the display identification data or a high-bandwidth digital content protection technology through the clock signal transmission path of the display data message channel and the serial data transmission path.