CN101478695A - Expanded display recognition data and information writing method for high-resolution multimedia interface - Google Patents
Expanded display recognition data and information writing method for high-resolution multimedia interface Download PDFInfo
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- CN101478695A CN101478695A CNA2008102181256A CN200810218125A CN101478695A CN 101478695 A CN101478695 A CN 101478695A CN A2008102181256 A CNA2008102181256 A CN A2008102181256A CN 200810218125 A CN200810218125 A CN 200810218125A CN 101478695 A CN101478695 A CN 101478695A
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Abstract
The present invention discloses an expanded display identification data information writing-into method of high definition multimedia interface. The method comprises the following steps: allocating one part of space in the flash memory of flat panel TV memory, writing the source information of expanded display identification data into the flash memory with a binary format, exchanging collocation information between a transmitting end and a receiving end of high definition multimedia interface through display data channel, confirming the setting and function displayed by the terminal of receiving end, determining the audio/video data transmission format between the transmitting end and the receiving end, and selecting the optimal matching video/audio display format. The invention does not require additionally an E<2>PROM for storing the EDID information, realizes the same function with least component and saves the hardware cost. The invention is suitable to apply in the flat panel display field.
Description
Technical field
The present invention relates to a kind of expanded display recognition data and information writing method of HDMI (High Definition Multimedia Interface).
Background technology
In the detection of simulated television, PC main frame and display are by DDC (Display DataChannel, DDC) data in the data wire reference to storage, with the display properties of determining display (as resolution, aspect ratio etc.) information, equally, in the detection of Digital Television, also continue to use HDMI (High Definition Multimedia Interface, be HDMI (High Definition Multimedia Interface)) the DDC data wire of interface visit EDID (Extended Display Identification DATA, be expanded display recognition data) memory, to determine the relevant display properties of Digital Television.
EDID is the display format data standard of the PC display organized to set up of VESA (Video Electronics Standards Association, i.e. VESA), is an important component part of HDMI interface.The transmitting terminal of HDMI interface and receiving terminal are consulted both sides' image transmitted form by EDID.Transmitting terminal judges by reading the EDID data of receiving terminal whether receiving terminal is HDMI equipment.
The DDC passage is used for some configuration informations of exchange between HDMI transmission and the receiving terminal.Transmitting terminal is by the DDC passage, reads receiving terminal and is kept at EDID data in the flash memory, obtains the information of receiving terminal, confirms setting and function that the receiving terminal terminal shows, decision with between the receiving terminal with what form transmission tone video data.
CEC (electric control of Consumer Electronics Control family) passage is optional passage.By the CEC passage, can realize the Advanced Control function between some audio ﹠ video equipments, such as the two-way communication of supporting between video source and Digital Television, the realization singly-bound is pressed start simultaneously, powers on automatic signal route, functions such as Long-distance Control automatically.
The HDMI interface has the hot plug function, and transmitting apparatus detects HPD (Hot Plug Detect, hot plug detects) and when signal is low, goes to read the data that are stored in EDID on the flash memory FLASH certain position, confirms whether receiving system occurs changing.
The panel TV memory module generally comprises flash memory FLASH, DDR DRAM and 2 E
2PROM; Flash memory FLASH is used to store LCD TV working procedure, system E
2PROM is used to store user's open state and channel parameter, EDID E
2PROM such as 24LC21 etc. are used to store parameters such as resolution that manufacturer's information, input signal can support, field frequency, color depth.
In the prior art, need to write and detect EDID in the manufacture process of flat panel display product, storage EDID's is that a slice is by I
2The E of the total line traffic control of C
2PROM (electric erasable programmable memory device), traditional wiring method are that burned in advance binary file is to E
2Among the PROM, video card and the TV and communication by computer obtains EDID information then, checks in the hardware attributes of computer.
This detection method efficient is low, cost height, poor stability.When breaking down, take housing of TV set apart, pull down E
2PROM programming binary file again.This way has increased workload, has wasted a large amount of manpower and materials that get, and has reduced production efficiency.
Thereby prior art awaits to improve and improve.
Summary of the invention
The objective of the invention is to overcome the defective that the prior art middle plateform shows product inspection method, propose the EDID wiring method of the HDMI of a kind of high efficiency, low cost, high reliability, the method can be applied in the flat panel display product manufacture process.
Technical scheme of the present invention comprises:
A kind of expanded display recognition data and information writing method of HDMI (High Definition Multimedia Interface) wherein, comprising:
A, in the flash memory of panel TV set memory, mark and detect the file memory space, be used to store expanded display recognition data source file information;
B, described expanded display recognition data source file information is write described flash memory with binary format detect in the file memory space;
C, described HDMI (High Definition Multimedia Interface) transmitting terminal and receiving terminal exchange configuration information by DDC;
Setting and function that D, the described receiving terminal terminal of affirmation show determine the audio, video data transformat between described transmitting terminal and the described receiving terminal;
E, input signal source connect television set by described TV HDMI (High Definition Multimedia Interface), and described input signal source and television set mate automatically, and show that in described expansion the video/audio format of selecting coupling in the identifying information shows.
Described method, wherein, described step C comprises:
Described transmitting terminal is when detecting hot plug information when low, by described DDC, reads described receiving terminal and is kept at expanded display recognition data in the flash memory, obtains the information of receiving terminal;
Described method, wherein, described step C also comprises the following steps of described HDMI (High Definition Multimedia Interface) work:
S1, definite television set display properties that detects;
S2, from flash memory, read expansion and show identifying information; Identification shows whether the identification passage is normal; The affirmation Digital Television is a HDMI (High Definition Multimedia Interface);
S3, affirmation HDCP, the HDCP key is correct;
S4, carry out audio, video data transmission;
S5, transition minimized differential signaling decoding;
S6, back-end processing show.
The EDID information write-in method of a kind of HDMI proposed by the invention is directly write EDID source file information in the memory flash memory with binary format, does not need additionally to add E
2PROM storage EDID information has realized same function with minimum element, can be applied to the flat panel display field, saves hardware cost.
Description of drawings
Fig. 1 is HDMI transmitting terminal of the present invention and receiving terminal communication scheme;
Fig. 2 is a HDMI interface workflow diagram of the present invention.
Embodiment
Below with reference to accompanying drawing embodiment of the present invention is described in detail.
The method that the present invention proposes is: the EDID information of HDMI is write direct among the display flash memory FLASH, save the E of storage EDID information on the traditional handicraft
2The PROM chip.
Performing step of the present invention is:
Set EDID information stores space: flash memory is marked a part of space storage EDID source file information;
EDID source file information is write among the flash memory FLASH with binary format;
HDMI transmitting terminal and receiving terminal exchange configuration information by DDC;
Utilize HDMI interface hot plug function,,, read the data that are stored in EDID on the flash memory FLASH certain position by the DDC passage when transmitting apparatus detects HPD (Hot Plug Detect hot plug detection) signal when low;
Confirm setting and function that the receiving terminal terminal shows, what form transmission tone video data decision follows between the receiving terminal with;
When input signal source connects by TV HDMI interface, because the equipment with HDMI has the characteristics of " plug and play ", input signal source and can carry out " negotiation " automatically as the television set of display device, and in EDID information, select the video/audio format of optimum coupling to show.
HDMI transmitting terminal of the present invention and receiving terminal signal intelligence are as shown in Figure 1.
Left frame is the HDMI transmitting terminal among the figure, and right frame is the HDMI receiving terminal.The transmitting terminal of HDMI interface and receiving terminal are consulted both sides' image transmitted form by EDID.Transmitting terminal judges by reading the EDID data of receiving terminal whether receiving terminal is HDMI equipment.
EDID FLASH is the memory flash memory that stores the expanded display recognition data source file information of binary format.
The DDC passage is used for some configuration informations of exchange between HDMI transmitting terminal and the receiving terminal.Transmitting terminal is by the DDC passage, reads receiving terminal and is kept at EDID data in the flash memory, obtains the information of receiving terminal, confirms setting and function that the receiving terminal terminal shows, decision with between the receiving terminal with what form transmission tone video data.
TMDS (Transition Minimized Differential Signaling, transition minimized differential signaling) encryption algorithm of uses advanced is encoded to the 10bit data to 8bit data (every roadbed chrominance signal among the R/G/B) by minimum transition, (comprising capable field synchronization information, clock information, data DE, error correction etc.), after the DC balance, adopt the differential signal transmission data, receiving terminal becomes the 8bit data with the 10bit data decode again after receiving signal.
CES (electric control of Consumer Electronicl Control family) is optional, can realize the two-way communication between audio frequency and video and Digital Television, realizes powering on automatic signal route, Long-distance Control etc. automatically.
HDMI interface workflow of the present invention comprises as shown in Figure 2:
S1, detect television set HPD display properties?, do not withdraw from; Be to change next step;
S2, television set read the EDID expansion and show identifying information from flash memory; Identification DDC shows whether the identification passage is correct, not, withdraws from; Be to change next step;
Whether S3, discriminating digit TV the HDMI HDMI (High Definition Multimedia Interface); , do not withdraw from; Be to change next step;
S4, affirmation HDCP HDCP; Does DDC show the digital channel mistake? not, withdrawing from, is to change next step;
S5, HDCP KEY HDCP key correctly deny, not, withdraw from, and be to change next step;
S6, audio, video data transmission;
S7, transition minimized differential signaling TMDS decoding;
S8, back-end processing show.
In sum, the EDID information write-in method of a kind of HDMI proposed by the invention in numeric display unit is detected, is directly write EDID source file information in the memory flash memory with binary format, does not need additionally to add E
2PROM storage EDID information has realized same function with minimum element.
Should be understood that above-mentioned description at specific embodiment is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (3)
1, a kind of expanded display recognition data and information writing method of HDMI (High Definition Multimedia Interface) is characterized in that, comprising:
A, in the flash memory of panel TV set memory, mark and detect the file memory space, be used to store expanded display recognition data source file information;
B, described expanded display recognition data source file information is write described flash memory with binary format detect in the file memory space;
C, described HDMI (High Definition Multimedia Interface) transmitting terminal and receiving terminal exchange configuration information by DDC;
Setting and function that D, the described receiving terminal terminal of affirmation show determine the audio, video data transformat between described transmitting terminal and the described receiving terminal;
E, input signal source connect television set by described TV HDMI (High Definition Multimedia Interface), and described input signal source and television set mate automatically, and show that in described expansion the video/audio format of selecting coupling in the identifying information shows.
2, method according to claim 1 is characterized in that, described step C comprises:
Described transmitting terminal is when detecting hot plug information when low, by described DDC, reads described receiving terminal and is kept at expanded display recognition data in the flash memory, obtains the information of receiving terminal;
3, method according to claim 1 is characterized in that, described step C also comprises the following steps of described HDMI (High Definition Multimedia Interface) work:
S1, definite television set display properties that detects;
S2, from flash memory, read expansion and show identifying information; Identification shows whether the identification passage is normal; The affirmation Digital Television is a HDMI (High Definition Multimedia Interface);
S3, affirmation HDCP, the HDCP key is correct;
S4, carry out audio, video data transmission;
S5, transition minimized differential signaling decoding;
S6, back-end processing show.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008102181256A CN101478695A (en) | 2008-12-06 | 2008-12-06 | Expanded display recognition data and information writing method for high-resolution multimedia interface |
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| CNA2008102181256A CN101478695A (en) | 2008-12-06 | 2008-12-06 | Expanded display recognition data and information writing method for high-resolution multimedia interface |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015154496A1 (en) * | 2014-08-15 | 2015-10-15 | 中兴通讯股份有限公司 | Adaptive audio output method and apparatus, and audio sending end and system |
| CN105430535A (en) * | 2015-11-20 | 2016-03-23 | 小米科技有限责任公司 | Output parameter regulating method and apparatus |
| CN105892963A (en) * | 2015-11-26 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Method for generating extended display identification data EDID and display device |
| TWI551115B (en) * | 2015-08-19 | 2016-09-21 | 立端科技股份有限公司 | display detecting device |
| WO2016202242A1 (en) * | 2015-06-17 | 2016-12-22 | 华为技术有限公司 | Arc control method, control unit, and display device |
| CN111163271A (en) * | 2019-12-13 | 2020-05-15 | 晶晨半导体（深圳）有限公司 | EDID version switching method for solving HDMI compatibility problem |
| CN112753076A (en) * | 2018-09-24 | 2021-05-04 | 皇家飞利浦有限公司 | Medical monitoring system |
| CN114173077A (en) * | 2021-11-30 | 2022-03-11 | 联想(北京)有限公司 | Control method and electronic device |
| CN114650456A (en) * | 2020-12-17 | 2022-06-21 | 深圳Tcl新技术有限公司 | Configuration method, system, storage medium and configuration equipment of audio descriptor |
-
2008
- 2008-12-06 CN CNA2008102181256A patent/CN101478695A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015154496A1 (en) * | 2014-08-15 | 2015-10-15 | 中兴通讯股份有限公司 | Adaptive audio output method and apparatus, and audio sending end and system |
| WO2016202242A1 (en) * | 2015-06-17 | 2016-12-22 | 华为技术有限公司 | Arc control method, control unit, and display device |
| TWI551115B (en) * | 2015-08-19 | 2016-09-21 | 立端科技股份有限公司 | display detecting device |
| CN105430535A (en) * | 2015-11-20 | 2016-03-23 | 小米科技有限责任公司 | Output parameter regulating method and apparatus |
| CN105892963A (en) * | 2015-11-26 | 2016-08-24 | 乐视致新电子科技（天津）有限公司 | Method for generating extended display identification data EDID and display device |
| CN112753076A (en) * | 2018-09-24 | 2021-05-04 | 皇家飞利浦有限公司 | Medical monitoring system |
| CN111163271A (en) * | 2019-12-13 | 2020-05-15 | 晶晨半导体（深圳）有限公司 | EDID version switching method for solving HDMI compatibility problem |
| CN114650456A (en) * | 2020-12-17 | 2022-06-21 | 深圳Tcl新技术有限公司 | Configuration method, system, storage medium and configuration equipment of audio descriptor |
| CN114650456B (en) * | 2020-12-17 | 2023-07-25 | 深圳Tcl新技术有限公司 | Configuration method, system, storage medium and configuration equipment of audio descriptor |
| CN114173077A (en) * | 2021-11-30 | 2022-03-11 | 联想(北京)有限公司 | Control method and electronic device |
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Application publication date: 20090708 |