CN104980678B - The Transmission system and its method of multimedia messages - Google Patents
The Transmission system and its method of multimedia messages Download PDFInfo
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- CN104980678B CN104980678B CN201410136057.4A CN201410136057A CN104980678B CN 104980678 B CN104980678 B CN 104980678B CN 201410136057 A CN201410136057 A CN 201410136057A CN 104980678 B CN104980678 B CN 104980678B
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Abstract
The Transmission system and its method of a kind of multimedia messages, including a multimedia host, an output device and a control device.Wherein, when one manipulation signal of control device transmission is to multimedia host, multimedia host is according to manipulation signal to start an asynchronous mechanism, in asynchronous mechanism, coding unit will manipulate signal coding, and the manipulation signal after encoding penetrates transmitting element to load the serial datum transmission path of a display data dedicated channel, and via transmission line to output device.Receiving unit receives the manipulation signal after encoding from the serial data transmission path of display data dedicated channel, and decoding unit decodes the manipulation signal after coding, so that output of the second processing unit according to manipulation signal control output unit.
Description
Technical field
The present invention is the Transmission system and its method for a kind of multimedia messages, and fine definition is penetrated especially with regard to a kind of
The Transmission system and its method of multimedia interface or the multimedia messages of digital visual interface transmission.
Background technology
With the progress of multimedia video science and technology, people’s lives and multimedia video science and technology are closely bound up, wherein more matchmakers
The audio-visual scientific and technological environment such as applied to teaching, monitoring, concert, presentations, advertisement or video wall of body, therefore, more matchmakers
Body it is audio-visual science and technology often through high-definition multimedia interface (High Definition Multimedia Interface,
HDMI) or Digital Video Interface (Digital Visual Interface, DVI) is to be applied in above-mentioned environment.However, some
It manipulates multimedia control device and is unable to control the output devices such as DTV, display or projector or some multimedias
Host can not connect the devices such as example, mouse and/or keyboard, cause to use upper inconvenience whereby.
Invention content
The invention reside in a kind of Transmission system and its method of multimedia messages is provided, wherein multimedia host penetrates high definition
The display data dedicated channel of clear degree multimedia interface (or digital visual interface), with transmission manipulation signal to output device,
The efficiency and convenience of the Transmission system of multimedia messages are promoted whereby.
The present invention proposes a kind of Transmission system of multimedia messages, including a multimedia host, an output device and a behaviour
Control device.Multimedia host includes a first processing units, a coding unit and a transmitting element and an accommodation unit, and coding is single
Member connection first processing units and transmitting element, first processing units coupling coding unit, transmitting element and accommodation unit.Output
Device has a second processing unit, a decoding unit, a receiving unit and an output unit, decoding unit connection second processing
Unit and receiving unit, second processing unit connection decoding unit, receiving unit and output unit, and receiving unit is passed through one
Defeated line connects transmitting element.Control device connects the accommodation unit of multimedia host.Wherein, in one manipulation news of control device transmission
When number giving multimedia host, multimedia host is according to manipulation signal to start an asynchronous mechanism, in asynchronous mechanism, coding unit
Manipulation signal is encoded, and the manipulation signal after coding is serial to load the one of a display data dedicated channel through transmitting element
Data transfer path, and via transmission line to output device；Wherein, receiving unit is from the serial of display data dedicated channel
Data transfer path receives the manipulation signal after coding, and decoding unit decodes the manipulation signal after coding, so that second processing
Unit controls the output of output unit according to manipulation signal.
Wherein, the coding unit according to an asynchronous start-stop coded format to be encoded to the manipulation signal, and the decoding unit
According to an asynchronous start-stop coding formats with to the manipulation signal decoding after coding.
Wherein, the startup form of the asynchronous start-stop coded format is that the ratio of high logic level signal and low logic level is
6 to 1, and the ratio that the stopping form of the asynchronous start-stop coded format is high logic level signal and low logic level is 9 to 1.
Wherein, in the asynchronous mechanism, first processing units pause one frenquency signal of output to the display data message is believed
The one frenquency signal transmission path in road or the decoding unit omit the frenquency signal transmission road of the display data dedicated channel
The frenquency signal that diameter is transmitted.
Wherein, which is high-definition multimedia interface or digital visual interface, and the receiving unit is high definition
Clear degree multimedia interface or digital visual interface, the accommodation unit for a wired connection port and a wireless communication port wherein
One of or combination.
Wherein, which for one of a keyboard, a mouse and a remote controler or combines, the multimedia host
For one of a hard disc player, a store media player, a game machine, an electricity and a computer, output dress
It is set to one of a display, a projector, a DTV and a loud speaker.
The present invention proposes a kind of transmission method of multimedia messages, suitable for a multimedia host, an output device and a behaviour
Device is controlled, multimedia host connects output device, control device connection multimedia host, and transmission method packet through a transmission line
It includes：Multimedia host judges whether that receiving one manipulates signal, and if the determination result is YES, then multimedia host starts an asynchronous machine
System；In asynchronous mechanism, a coding unit of multimedia host will manipulate signal coding；Manipulation signal after coding penetrates more matchmakers
One transmitting element of body host, to load the serial datum transmission path of a display data dedicated channel, and it is defeated to be transmitted to
Go out device；One receiving unit of output device receives the behaviour after encoding from the serial data transmission path of display data dedicated channel
Control signal；One decoding unit of output device decodes the manipulation signal after coding；An and second processing unit of output device
According to manipulation signal to control the output of an output unit.
Wherein, the transmission method of above-mentioned multimedia messages, further includes：
One frenquency signal of multimedia host pause one frenquency signal of output to the display data dedicated channel transmits road
Diameter.
Wherein, the transmission method of above-mentioned multimedia messages, further includes：
One notice signal of multimedia host transmission gives the output device；And the output device is according to the notice signal, with
Omit the frenquency signal that a frenquency signal transmission path of the display data dedicated channel is transmitted.
Wherein, which judges whether to receive a manipulation signal, if judging result is no, the multimedia host
A synchronization mechanism is performed, in the synchronization mechanism, which passes through the frenquency signal of the display data dedicated channel
Defeated path and the serial data transmission path expand display identification data or a high-bandwidth digital content protection skill with transmission one
The signal of art.In conclusion the specific means of the present invention is the Transmission system using multimedia messages, including a multimedia master
Machine, an output device and a control device.Wherein, user exports manipulation signal to multimedia host through control device, and more
Media host is according to signal is manipulated to start an asynchronous mechanism, so that the one of frenquency signal pause loaded and displayed data dedicated channel
Manipulation signal after frenquency signal transmission path and coding is through transmitting element with a string of loaded and displayed data dedicated channel
Row data transfer path, and output device is transferred to, therefore, output device controls the output of output unit according to manipulation signal,
The efficiency and convenience of the Transmission system of multimedia messages are promoted whereby.
Above general introduction and next embodiment are all technological means in order to further illustrate the present invention with reaching work(
Effect, the embodiment so described only provide reference explanation use with schema, are not intended to limit the present invention.
Description of the drawings
Fig. 1 is the transmission system function block diagram of the multimedia messages of one embodiment of the invention.
Fig. 2 is to be believed according to the display data message of the Transmission system of the multimedia messages of another embodiment of the present invention of Fig. 1
Road schematic diagram.
Fig. 3 is the transmission system function block schematic diagram of the multimedia messages of another embodiment of the present invention.
Fig. 4 is the transmission method flow chart of the multimedia messages of another embodiment of the present invention.
Fig. 5 is the transmission method flow chart of the multimedia messages of another embodiment of the present invention.
Reference sign：
1、1a：The Transmission system of multimedia messages
10、10a：Multimedia host
100、100a：First processing units
102、102a：Transmitting element
104、104a：Coding unit
106、106a：Accommodation 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：Minimize transmission differential signal channel
DDC：Display data dedicated channel
CEC：Consumer electronics control signaling channel
Hot Plug Detect：Heat is inserted into detection signal channel
SDA：Serial data transmission path
SCL：Frenquency signal transmission path
S1：Start form
D1：Data format
E1：Stop form.
Specific embodiment
Fig. 1 is the transmission system function block diagram of the multimedia messages of one embodiment of the invention.It please refers to Fig.1.Multimedia
Data transmission system includes a multimedia host 10, an output device 12 and a control device 16, and wherein multimedia host 10 is saturating
A transmission line 14 connection output device 12 is crossed, and multimedia host 10 connects a control device 16 with communication.In order to
Facilitate explanation, the multimedia host 10 of the present embodiment is with blue light (BD) player, and output device 12 is with DTV, and is grasped
Control device 16 is illustrated with remote controler.
A 10 exportable video-audio signal of multimedia host, and output device 12 is transmitted to via above-mentioned transmission line 14, so that
Output device 12 exports shadow audio number, in addition, user can pass through control device 16 to key in a manipulation signal, and the manipulation is interrogated
After number via the operation of multimedia host 10, coding and processing, and through high-definition multimedia interface (High
Definition Multimedia Interface, HDMI) display data dedicated channel DDC be transmitted to output device 12, then
After 12 operation of output device, decoding and processing, so that the output device 12 exports the content of display, sound according to manipulation signal
Sound or channel.
In other embodiments, multimedia host 10 is, for example, that store medias player, the hard disks such as DVD, MP3 or MP4 are broadcast
Put device, game machine, pen electricity or computer.Output device 12 is, for example, that display, projector, LCD screen, loud speaker etc. are audio-visual defeated
Go out device.And control device 16 be, for example, wireless mouse, Wireless Keyboard, wire mouse, wired keyboard and remote controler wherein it
One or combination.The present embodiment does not limit the aspect of multimedia host 10, output device 12 and control device 16.
Specifically, multimedia host 10 has a first processing units 100, a coding unit 104, a transmitting element
102 and an accommodation unit 106.In practice, first processing units 100 couple coding unit 104, transmitting element 102 and accept
Unit 106, and coding unit 104 couples transmitting element 102 and first processing units 100, transmitting element 102 is electrically connected transmission
Line 14, another accommodation unit 106 can be wirelessly communicated with control device 16, and wherein accommodation unit 106 is, for example, infrared-ray communication device, indigo plant
Bud communicator, Wireless LAN (Wireless LAN) communicator, wireless personal network (Wireless PAN) communicator, nothing
Line fidelity (Wi-Fi) communicator or ZigBee (802.15.4) communicator, this example do not limit multimedia host 10 and accept
The aspect of unit 106.
Output device 12 has a receiving unit 122, a decoding unit 124, a second processing unit 120 and output unit
126.In practice, second processing unit 120 couples receiving unit 122, decoding unit 124 and output unit 126, decoding unit
124 coupling receiving units 122 and second processing unit 120, and receiving unit 122 is electrically connected transmission line 14, this example is unlimited
The aspect of output device 12 processed.
In practice, transmitting element 102 is, for example, high-definition multimedia interface or digital visual interface, to send sound
Frequently, one of the shadows such as video audio number and manipulation signal or combination, and receiving unit 122 is, for example, high-definition multimedia
Interface or digital visual interface, to receive one of the shadows such as audio, video audio number and manipulation signal or combination, wherein
Transmission line 14 is coupled between multimedia host 10 and output device 12, and transmission line 14 is according to transmitting element 102 or receives
The aspect of unit 122 and design.For convenience of explanation, the present embodiment transmitting element 102 and receiving unit 122 are for fine definition
Multimedia interface illustrates, and transmission line 14 is for the electrical signals line with high-definition multimedia interface, and the present embodiment is not
Limit the aspect of transmitting element 102, receiving unit 122 and transmission line 14.
In addition, transmission line 14, which has one to minimize, transmits differential signal（Transition Minimized
Differential Signaling, TMDS）Channel, a display data dedicated channel（Display Data Channel,
DDC）, a consumer electronics control signal（Consumer Electronics Control, CEC）Detection signal is inserted into a heat
Channel（Hot Plug Detect, HDP）.Therefore, it is defeated to be transmitted to can pass through transmission line 14 for the shadow audio number of multimedia host 10
Go out device 12,12 exportable high-definition multimedia interface of output device is audio-visual whereby.In other embodiments, transmission line 14
For example, the electrical signals line of digital visual interface, the present embodiment do not limit the aspect of transmission line 14.
Furthermore, it is understood that coding unit 104 is, for example, video information coder, subtitle graphic encoders, literal code device, sound
One of frequency encoder, disparity vector encoder, asynchronous start-stop format encoder and asynchronous mechanism encoder or combination, this
Embodiment does not limit the aspect of coding unit 104.Conversely, decoding unit 124 is, for example, video decoder, the decoding of subtitle figures
Device, character code translator, tone decoder, disparity vector decoder, asynchronous start-stop format encoder and asynchronous mechanism encoder
One of them is combined.The present embodiment does not limit the aspect of coding unit 104 and decoding unit 124.
In addition, first and second processing unit 100,120 is, for example, sound processing device, central processing unit or microprocessor,
To calculate, operation or the signal that is transmitted of processing each unit, another output unit 126 is, for example, LCD screen or loudspeaker, to
Output character, pattern, image or sound, the present embodiment do not limit first, second processing unit 100,120 and output unit 126
Aspect.
In general, when 1 framework of the Transmission system of multimedia messages is completed, multimedia host 10 can penetrate display data
The serial datum transmission path SDA of a dedicated channel DDC and frenquency signal transmission path SCL, with synchronous coding format transmission
Data signals and frenquency signal, wherein data signals are decoded simultaneously according to frenquency signal, and therefore, multimedia host 10 can obtain
One expands display recognition data and information (Extended Display Identification Data, EDID), however, more matchmakers
After body host 10 obtains expansion display recognition data and information, multimedia host 10 carries out high band with interval several seconds in the primary period
The biography of the signal of wide digital content protection technology (High Bandwidth Digital Content Protection, HDCP)
It passs, to prevent the bootlegging of digital signal, image data.Therefore, the volume of transmitted data of display data dedicated channel DDC is simultaneously
Less, and the present invention is to load manipulation signal using the serial data transmission path SDA of display data dedicated channel DDC, is borrowed
This reach control output device 12 running or make output device 12 according to manipulation signal with export for example, mouse pointer or
Key in the manipulation signal such as word.
For example, when user's operation control device 16, during adjusting the screen brightness of output device 12, multimedia master
Machine 10 penetrates accommodation unit 106 to receive a manipulation signal, and it is, for example, the brightness for indicating output device 12 to manipulate signal
Signal, when first processing units 100 judge accommodation unit 106 receive manipulation signal when, first processing units 100 start
One asynchronous mechanism, wherein asynchronous mechanism are that instruction manipulation signal transmits or manipulate news through serial data transmission path SDA
Number mechanism for being not through frenquency signal transmission path SCL to transmit.
Therefore, first processing units 100 control coding unit 104 so that coding unit 104 with asynchronous coded format to behaviour
It controls signal to encode, the manipulation signal after coding penetrates transmitting element 102 to load serial data transmission path SDA, wherein asynchronous
Coded format is, for example, asynchronous start-stop（asynchronous start-stop）Form or manufacturer's coded format, and receiving unit
122 receive the manipulation signal after encoding from serial data transmission path SDA, and later, decoding unit 124 interrogates the manipulation after coding
Number decoding, therefore, second processing unit 120 can be read and recognize manipulation signal, so, second processing unit 120 is according to manipulation
Signal is to control the output of output unit 126.Thus, the control device 16 of the present invention is adjustable or controls output device 12
Screen brightness, show other characteristics of picture or the sound size of output device 12, the present embodiment do not limit multimedia number
According to the running aspect of Transmission system.
Fig. 2 is to be believed according to the display data message of the Transmission system of the multimedia messages of another embodiment of the present invention of Fig. 1
Road schematic diagram.Please refer to Fig. 2 and Fig. 1.Display data dedicated channel DDC between transmitting element 102 and receiving unit 122 has
Serial datum transmission path SDA (Serial Data Line) and frenquency signal transmission path SCL (Serial Clock
Line), wherein first processing units 100 start an asynchronous mechanism, and therefore, first processing units 100 suspend output frequency signal
To frenquency signal transmission path SCL, and the manipulation signal after encoding penetrates transmitting element 102 to load serial data transmission path
SDA, wherein the manipulation signal after coding, which can be divided into, starts three sections of form S1, data format D1 and stopping form E1 etc..
Specifically, the startup form S1 of asynchronous start-stop coded format is high logic level signal and low logic level
Ratio is 6 to 1；The data format D1 of asynchronous start-stop coded format is that the ratio of high logic level signal and low logic level is 3
Than 1 and the ratio of high logic level signal and low logic level is 1 to 3, and wherein data format D1 is the number of 8 (bit)
According to and data format D1 can be set according to the function of output device 12, such as when the data of 8 are " 11101000 ", be represented
The screen brightness of output device 12 is adjusted, when the data of another 8 are " 11111100 ", represents the sound of adjustment output device 12
Size, technical field tool usually intellectual can optionally free design data form D1；And asynchronous start-stop coded format
Stopping form E1 be the ratio of high logic level signal and low logic level be 9 to 1.
In addition, technical field tool usually intellectual, which optionally can freely design, starts form S1 and stopping form
E1.Such as the startup form S1 of asynchronous start-stop coded format is, the ratio of high logic level signal and low logic level is 6 to 6；
And the ratio that the stopping form E1 of asynchronous start-stop coded format is high logic level signal and low logic level is 10 to 1, wherein
Start form S1 and stop form E1 by coding unit 104 and decoding unit 124 energy coding and decoding set form, for example, compile
Code unit 104 and decoding unit 124 are every time stopping with " 11111111110 " every time with " 111111000000 " to start,
The present embodiment is not intended to limit the aspect of asynchronous start-stop coded format.
It is noted that in other embodiments, decoding unit 124 can omit the frequency of display data dedicated channel DDC
The frenquency signal that rate signal transmission path SCL is transmitted.In other words, transmitting element 102 can transmitting serial data and frequency news
Number, wherein frenquency signal can be neglected in decoding unit 124, therefore, frenquency signal decoding unit 124 can be considered no activation message or
Invalid signal, so, decoding unit 124 can decode serial data, and the present embodiment does not limit the Transmission system 1 of multimedia messages
Running aspect.
Fig. 3 is the transmission system function block schematic diagram of the multimedia messages of another embodiment of the present invention.Please refer to Fig. 3 and
Fig. 1.The Transmission system 1a of the multimedia messages of the present embodiment is similar to the Transmission system 1 of the multimedia messages of previous embodiment,
Such as the Transmission system 1a of multimedia messages can also penetrate asynchronous mechanism, so that the manipulation signal after coding can pass through transmitting element
102a is to load serial data transmission path SDA, and by receiving unit 122a from after serial data transmission path SDA receives coding
Manipulation signal, whereby output device 12a output manipulation signal.
However, still have difference between the Transmission system 1a of the present embodiment and the multimedia messages of previous embodiment, 1,
It is：Accommodation unit 106a is, for example, universal serial bus (USB), mini universal serial bus (Mini USB) or micro universal
Universal serial bus (Micro USB), thunder and lightning port (Thunderbolt I/O) or other ports, therefore, control device 16a can be with
Inserting mode connects accommodation unit 106a, and in other embodiments, accommodation unit 106a is, for example, a wired connection port and one
One of wireless communication port or combination, the present embodiment do not limit the aspect of accommodation unit 106a.
For convenience of explanation, the control device 16a of the present embodiment is with wired keyboard, and multimedia host 10a is to calculate
Machine, wherein accommodation unit 106a are with universal serial bus (USB), and output device 12a is illustrated with display, this implementation
Example does not limit the aspect of the Transmission system 1a of multimedia messages.In addition, manipulation signal is, for example, universal serial bus signal or key
The signal of disk instruction, in other embodiments, manipulation signal is, for example, the signal of mouse pointer or the signal of wireless communication, this reality
Apply the aspect that example does not limit manipulation signal.
For example, user's operation is, for example, the control device 16 of wired keyboard, and it is, for example, " Email to key in
The manipulation signal of location ", wherein manipulation signal penetrates accommodation unit 106a to be transmitted to the multimedia host of for example, computer
10a, multimedia host 10a penetrate the specification of universal serial bus (USB), and judge to receive manipulation signal, therefore, more matchmakers
Body host 10a starts asynchronous mechanism, so that the manipulation signal after coding can pass through transmitting element 102a to load serial data biography
Defeated path SDA, and the manipulation signal after encoding is received from serial data transmission path SDA by receiving unit 122a, whereby for example
Output device 12a for display would indicate that the manipulation signal of " e-mail address ".
In addition to above-mentioned difference, technical field tool usually intellectual refers to above-described embodiment and above-mentioned difference
Afterwards, can should easily deduce, therefore it will not be described here.
Fig. 4 is the transmission method flow chart of the multimedia messages of another embodiment of the present invention.Please refer to Fig. 4 and Fig. 1.It is a kind of
The transmission method of multimedia messages, suitable for a multimedia host 10, an output device 12 and a control device 16, multimedia host
10 connect output device 12 through a transmission line 14, and control device 16 connects multimedia host 10, and transmission method is including following
Step：
In step S401, multimedia host 10 judges whether to receive a manipulation signal.If the judging result of step S401
During to be, then step S403 is carried out, multimedia host 10 starts an asynchronous mechanism；Or the judging result of step S401 for it is no when,
Step S402 is then carried out, multimedia host 10 performs a synchronization mechanism.
In practice, the transmission method of multimedia messages of the invention is to utilize the display in high-definition multimedia interface
Data dedicated channel DDC, to synchronize mechanism or asynchronous mechanism, wherein in asynchronous mechanism, manipulation signal can pass through display
Serial data transmission path SDA in data dedicated channel DDC is to be transferred to output device 12, so that second processing unit 120
According to manipulation signal, to control the output of output device 12；Separately in synchronization mechanism, expand display identification data or high bandwidth
The signal of digital content protection technology can pass through frenquency signal transmission path SCL in display data dedicated channel DDC and serial
Data transfer path SDA is to be transferred to output device 12.Thus, the present invention can in high-definition multimedia interface, with
It carries out shadow audio number and controls the transmission of signal, this example does not limit the running aspect of the transmission method of multimedia messages.
Furthermore, it is understood that in asynchronous mechanism and step S405, one frenquency signal of the pause output of multimedia host 10 is extremely
A frenquency signal transmission path SCL of display data dedicated channel DDC.In practice, display data dedicated channel DDC has one
Frenquency signal transmission path SCL and serial datum transmission path SDA, to be connected to the transmitting element 102 of multimedia host 10
And between the receiving unit 122 of output device 12, signal used is synchronized when wherein frenquency signal is serial data sending and receiving, because
This, present invention pause one frenquency signal of output carries out asynchronous mechanism whereby to frenquency signal transmission path SCL.
Then, in step S407, a coding unit 104 will manipulate signal with asynchronous start-stop form and encode.In step
In S409, the manipulation signal after coding is serial to load the one of a display data dedicated channel DDC through a transmitting element 102
Data transfer path SDA, and to be transmitted to output device 12.
Later, in step S411, a receiving unit 122 is from the serial data transmission road of display data dedicated channel DDC
Diameter SDA receives the manipulation signal after coding.In step S413, a decoding unit 124 will be after coding with asynchronous start-stop form
Manipulate signal decoding.In practice, coding unit 104 is with startup form S1, the data format D1 of asynchronous start-stop form and stops
Only form E1 comes to manipulation signal coding, and wherein data format D1 is the manipulation signal before instruction is uncoded, such as manipulates signal
For " signal of adjustment screen brightness that remote controler is exported ", therefore, data format D1 is " the adjustment screen brightness
Signal, which is converted to, binary represents numerical value ".Separately when decoding unit 124 receives and starts form S1, decoding unit 124 performs
Asynchronous coding formats, when decoding unit 124 receives stopping form E1, decoding unit 124 performs simultaneous decoding form.
In step S415, second processing unit 120 is according to manipulation signal to control the output of an output unit 126.
In addition, when the judging result of step S401 is no, in step S402, multimedia host 10 is to perform one to synchronize
Mechanism.In step S404, multimedia host 10 through display data dedicated channel DDC frenquency signal transmission path SCL and
Serial data transmission path SDA expands the news of display identification data or a high-bandwidth digital content protection technology with transmission one
Number.It, should after technical field tool usually intellectual is with reference to above-described embodiment and above-mentioned difference in addition to above-mentioned difference
It can deduce easily, therefore it will not be described here.
Fig. 5 is the transmission method flow chart of the multimedia messages of another embodiment of the present invention.Please refer to Fig. 5.The present embodiment
Multimedia messages transmission method it is similar to the transmission method of the multimedia messages of previous embodiment Fig. 4.However, the present embodiment
The transmission methods of multimedia messages include the following steps：
In step S501, multimedia host 10 judges whether to receive a manipulation signal.If the judging result of step S501
It is yes, then carries out step S503, multimedia host 10 starts an asynchronous mechanism.
Then, step S505 and step S509, in step S505, multimedia master can be carried out at the same time after step S503
One notice signal of the transmission of machine 10 is to output device 12.Specifically, in asynchronous mechanism, multimedia host 10 is according to manipulation signal
Signal is notified to generate, wherein notice signal is, for example, to indicate that output device 12 carries out the signal of asynchronous mechanism, is transferred to whereby
Output device 12, to reach the effect of notice output device 12 enters asynchronous mechanism.
In step S507, output device 12 is according to notice signal, to omit a frequency of display data dedicated channel DDC
The frenquency signal that signal transmission path SCL is transmitted.In practice, after output device 12 receives notice signal, output dress
Asynchronous mechanism will be started by putting 12, to receive the manipulation signal after coding from serial data transmission path SDA, when output device 12
When receiving the stopping form E1 in asynchronous start-stop form, output device 12 can just restore to synchronization mechanism, in other words, output
Device 12 is that the initial time in asynchronous mechanism is " output device 12 receives notice signal certainly ", and output device 12 is to be in
The dwell time of asynchronous mechanism is " output device 12 receives the stopping form E1 in asynchronous start-stop form ", and when above-mentioned
Section, the frenquency signal that output device 12 will omit or ignore frenquency signal transmission path SCL and transmitted.
Later, in step S509, a coding unit 104 will manipulate signal with asynchronous start-stop form and encode.In step
In S511, the manipulation signal after coding is serial to load the one of a display data dedicated channel DDC through a transmitting element 102
Data transfer path SDA, and to be transmitted to output device 12.
Then, in step S513, a receiving unit 122 is from the serial data transmission road of display data dedicated channel DDC
Diameter SDA receives the manipulation signal after coding.In step S515, a decoding unit 124 will be after coding with asynchronous start-stop form
Manipulate signal decoding.Therefore, in step S517, the output manipulation signal of output unit 126.
In addition, if the judging result of step S501 is no, in step S502, multimedia host 10 starts a synchronous machine
System.In step S504, multimedia host 10 is through the frenquency signal transmission path SCL and string of display data dedicated channel DDC
Row data transfer path SDA expands the signal of display identification data or a high-bandwidth digital content protection technology with transmission one.
It is noted that step S505~S507 and step S509~S511 can be operated simultaneously or step S505~
S507 and step S509~S511 can be operated according to sequencing, such as after first carrying out step S505, then perform step S509, step
S507, step S511, the present embodiment do not limit the operation steps of the transmission method of multimedia messages.In addition to above-mentioned difference, institute
After belonging to technical field tool usually intellectual with reference to above-described embodiment and above-mentioned difference, can should easily it deduce, therefore herein
It will not go into details.
In conclusion the present invention is a kind of Transmission system of multimedia messages, including a multimedia host, an output device
An and control device.Wherein, user exports manipulation signal to multimedia host through control device, and multimedia host is according to behaviour
Signal is controlled to start an asynchronous mechanism, so that the frenquency signal transmission road of frenquency signal pause loaded and displayed data dedicated channel
Manipulation signal after diameter and coding transmits road through transmitting element with the serial datum of loaded and displayed data dedicated channel
Diameter, and output device is transferred to, and output device penetrates receiving unit to receive the manipulation signal after coding, and single through decoding
Member is decoded with the manipulation signal after encoding, and therefore, the second processing unit of output device is single according to manipulation signal control output
The output of member promotes the efficiency and convenience of the Transmission system of multimedia messages whereby.In addition, in asynchronous mechanism, multimedia
The exportable notification message of host is to output device, so that output device omits the frenquency signal transmission road of display data dedicated channel
The frenquency signal that diameter is transmitted, reach whereby control output unit output the effect of.Thus, the multimedia of the present invention
The Transmission system of information promotes the convenience of operation.
The foregoing is merely the embodiment of the present invention, are not the scope of the claims to limit to the present invention.
Claims (9)
1. a kind of Transmission system of multimedia messages, which is characterized in that including：
One multimedia host, including a first processing units, a coding unit and a transmitting element and an accommodation unit, the coding
Unit connects the first processing units and transmitting element, which couples the coding unit, the transmitting element and be somebody's turn to do
Accommodation unit；
One DTV has a second processing unit, a decoding unit, a receiving unit and an output unit, the decoding list
Member connects the second processing unit and the receiving unit, which connects the decoding unit, the receiving unit and be somebody's turn to do
Output unit, and the receiving unit connects the transmitting element through a transmission line；And
One control device connects the accommodation unit of the multimedia host；
Wherein, when one manipulation signal of control device transmission gives the multimedia host, which interrogates according to the manipulation
Number to start an asynchronous mechanism, in the asynchronous mechanism, which encodes the manipulation signal, and the manipulation after encoding
Signal penetrates the transmitting element to load the serial datum transmission path of a display data dedicated channel, and via the transmission line
It is transmitted to the output device；
Wherein, which receives the manipulation after encoding from the serial data transmission path of the display data dedicated channel
Signal, the decoding unit decode the manipulation signal after coding, so that the second processing unit is controlled according to the manipulation signal
The output of the output unit, the wherein coding unit, to be encoded to the manipulation signal, and are somebody's turn to do according to an asynchronous start-stop coded format
Decoding unit is according to an asynchronous start-stop coding formats with to the manipulation signal decoding after coding.
2. the Transmission system of multimedia messages according to claim 1, which is characterized in that the asynchronous start-stop coded format
It is 6 to 1 to start the ratio that form is high logic level signal and low logic level, and the stopping lattice of the asynchronous start-stop coded format
Formula is that the ratio of high logic level signal and low logic level is 9 to 1.
3. the Transmission system of multimedia messages according to claim 1, which is characterized in that in the asynchronous mechanism, this
One processing unit pause output one frenquency signal to a frenquency signal transmission path of the display data dedicated channel or this translate
Code unit omits the frenquency signal that the frenquency signal transmission path of the display data dedicated channel is transmitted.
4. the Transmission system of multimedia messages according to claim 1, which is characterized in that the transmitting element is fine definition
Multimedia interface or digital visual interface, and the receiving unit is high-definition multimedia interface or digital visual interface, this holds
Order member is one of a wired connection port and a wireless communication port or combination.
5. the Transmission system of multimedia messages according to claim 1, which is characterized in that the control device for a keyboard,
One of one mouse and a remote controler or combination, the multimedia host for a hard disc player, a store media player,
One of one game machine, an electricity and a computer.
6. a kind of transmission method of multimedia messages, suitable for a multimedia host, a DTV and a control device, more matchmakers
Body host connects the DTV through a transmission line, which connects the multimedia host, which is characterized in that and the biography
Transmission method includes：
The multimedia host judges whether that receiving one manipulates signal, and if the determination result is YES, then it is different to start one for the multimedia host
Step mechanism；
In the asynchronous mechanism, a coding unit of the multimedia host is according to an asynchronous start-stop coded format the manipulation to be interrogated
Number coding；
The manipulation signal after coding penetrates a transmitting element of the multimedia host, to load a display data dedicated channel
Serial datum transmission path, and to be transmitted to the DTV；
One receiving unit of the DTV is from after the serial data transmission path of the display data dedicated channel receives coding
The manipulation signal；
One decoding unit of the DTV is decoded according to an asynchronous start-stop coding formats with the manipulation signal after encoding；And
One second processing unit of the DTV is according to the output of the manipulation signal to control an output unit.
7. the transmission method of multimedia messages according to claim 6, which is characterized in that in the asynchronous mechanism the step of
In, it further includes：
Multimedia host pause exports a frenquency signal to a frenquency signal transmission path of the display data dedicated channel.
8. the transmission method of multimedia messages according to claim 6, which is characterized in that in the asynchronous mechanism the step of
In, it further includes：
One notice signal of multimedia host transmission gives the output device；And
The output device is passed according to the notice signal with the frenquency signal transmission path for omitting the display data dedicated channel
A defeated frenquency signal.
9. the transmission method of multimedia messages according to claim 7 or 8, which is characterized in that sentence in the multimedia host
Disconnected whether to receive a manipulation signal, if judging result is no, which performs a synchronization mechanism, in the synchronization mechanism
In, the frenquency signal transmission path and the serial data transmission road of the multimedia host through the display data dedicated channel
Diameter expands the signal of display identification data or a high-bandwidth digital content protection technology with transmission one.
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