CN201298875Y

CN201298875Y - HDCP key write device

Info

Publication number: CN201298875Y
Application number: CNU2008202134871U
Authority: CN
Inventors: 吴丽平
Original assignee: Shenzhen Tongxing Electronic Co Ltd
Current assignee: Shenzhen Tongxing Electronic Co Ltd
Priority date: 2008-11-11
Filing date: 2008-11-11
Publication date: 2009-08-26
Anticipated expiration: 2018-11-11

Abstract

The utility model relates to HDCP encryption technology, and provides a HDCP key write device, aiming at defects that the existing HDCP key writing method is not beneficial to modifying HDCP key and reduces use flexibility of HDCP key. The HDCP key write device is connected with a computer, is used for write key into HDCP support equipment and comprises an RS232 interface, a write module used for receiving keys from the computer through the RS232 interface and writing the keys into the HDCP support equipment. The HDCP key write device provided by the utility model has simple structure, wide market application and low cost, is easily realized, can conveniently write provided by the utility model and improves use flexibility.

Description

A kind of HDCP key writing station

Technical field

The utility model relates to the HDCP encryption technology, more particularly, relates to a kind of HDCP key writing station.

Background technology

Along with people's improving constantly to the picture quality requirement, transmit and show that the conventional art of multi-media signal can't continue to satisfy people's requirement with analog form, digital signal is replacing the important task that analog signal is taken on image data transmission and demonstration gradually.

HDCP (High-bandwidth Digital Content Protection; HDCP) technology, HDMI (High-Definition Multimedia Interface; high-definition media interface) technology and DVI (Digital Visual Interface, digital visual interface) technology produces under this form just.

The HDCP technology uses the array password of 40 groups of 56Bit to constitute the identity that key identifies each HDCP support equipment.The mode of existing burning HDCP key be in the production process of HDCP support equipment with in the HDCP key write memory, then this memory is installed in the HDCP support equipment.This burning mode is unfavorable for the modification of HDCP key, has therefore reduced the use flexibility of HDCP key.

Therefore, need a kind of HDCP key burning scheme, overcome the above-mentioned defective that exists in the existing HDCP key burning technology.

The utility model content

The technical problems to be solved in the utility model is that the defective at existing HDCP key burning mode is unfavorable for the modification of HDCP key and has reduced the use flexibility of HDCP key provides a kind of HDCP key writing station.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of HDCP key writing station links to each other with computing equipment, is used for writing key to the HDCP support equipment, comprising:

The RS232 interface;

Writing module is used for by the key of RS232 interface reception from described computing equipment, and it is write in the described HDCP support equipment.

In the HDCP key writing station that the utility model provides, also comprise:

The VGA interface;

The said write module writes described key in the described HDCP support equipment by described VGA interface.

In the HDCP key writing station that the utility model provides, also comprise:

USB interface;

The said write module is powered by described computing equipment by USB interface.

In the HDCP key writing station that the utility model provides, the said write module further comprises:

The RS232/VGA interface modular converter.

In the HDCP key writing station that the utility model provides, the T1OUT pin of described RS232/VGA interface modular converter connects the pin two of described RS232 interface.

In the HDCP key writing station that the utility model provides, the R1IN pin of described RS232/VGA interface modular converter connects the pin 3 of described RS232 interface.

In the HDCP key writing station that the utility model provides, the said write module also comprises:

Filter circuit;

Described RS232/VGA interface modular converter links to each other with described USB interface by filter circuit.

In the HDCP key writing station that the utility model provides, the VCC pin of described RS232/VGA interface modular converter links to each other with the VBUS pin of described USB interface by described filter circuit.

The power supply indicating member.

In the HDCP key writing station that the utility model provides, described power supply indicating member is a light-emitting diode, and its minus earth anodally links to each other with the VBUS pin of described USB interface.

Implement the technical solution of the utility model, has following beneficial effect: power for the HDCP key writing station that the utility model provides by USB interface, and utilize RS232 interface and RS232/VGA interface modular converter to receive key and it is write in the HDCP support equipment, the HDCP key writing station that makes the utility model provide is simple in structure, is easy to realize.Simultaneously, because USB interface technology, RS232 interfacing and RS232/VGA interface conversion technology are ripe already, market is widely used, thereby with low cost; In addition, the HDCP key writing station that the utility model provides can be realized writing of HDCP key easily, improves and uses flexibility.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the annexation schematic diagram according to the HDCP key writing station of the utility model one preferred embodiment;

Fig. 2 is the electrical block diagram according to the HDCP key writing station of the utility model one preferred embodiment;

Fig. 3 is the annexation schematic diagram according to the VGA interface of the VGA interface of the HDCP key writing station of the utility model one preferred embodiment and HDCP support equipment.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Fig. 1 is the annexation schematic diagram according to the HDCP key writing station of the utility model one preferred embodiment.As shown in Figure 1, computing equipment 102, HDCP key writing station 104 and HDCP support terminal 106 have wherein been showed.

Computing equipment (as PC) 102 is electrically connected with HDCP key writing station 104 by its USB interface, is used for to 104 power supplies of HDCP key writing station.Come HDCP key writing station 104 is powered by USB interface, the HDCP key writing station that makes the utility model provide need not the configuring external power supply adaptor, and operation is succinct, convenient.

Computing equipment 102 communicates to connect by its RS232 interface and HDCP key writing station 104, is used for transmitting key 108 to HDCP key writing station 104.The RS232 interface is as the computer serial line interface of standard, and technology maturation and obtained already using widely also has advantage with low cost simultaneously.

HDCP key writing station 104 communicates to connect by its VGA interface and HD computing equipment support equipment 106 (for example supporting the digital TV in high resolution machine of HDCP), and the key 108 that is used for receiving writes described HDCP computing equipment support equipment 106.

Below in conjunction with Fig. 2 and Fig. 3 the HDCP key writing station that the utility model provides is described in detail.

Fig. 2 is the electrical block diagram according to the HDCP key writing station of the utility model one preferred embodiment.As shown in Figure 2, the HDCP key writing station that provides of the utility model comprises RS232/VGA interface modular converter 202, filter circuit 204, power supply indicating member 206, USB interface 208 and RS232 interface 210.

The VCC pin of RS232/VGA interface modular converter 202 links to each other with the VBUS pin of USB interface 208 by filter circuit 204, so that be that RS232/VGA interface modular converter 202 is powered by USB interface.

The T1OUT pin of RS232/VGA interface modular converter 202 connects the pin two of RS232 interface 210.

The R1IN pin of RS232/VGA interface modular converter 202 connects the pin 3 of described RS232 interface.

The pin T1IN of RS232/VGA interface modular converter 202 links to each other with VGA interface (Fig. 2 is not shown) with R1OUT.

The positive pole of power supply indicating member 206 (as light-emitting diode) links to each other minus earth with the VBUS pin of USB interface 208.

Fig. 3 is the annexation schematic diagram according to the VGA interface of the VGA interface of the HDCP key writing station of the utility model one preferred embodiment and HDCP support equipment.As shown in Figure 3; be connected on the HDCP support equipment by the VGA line through the key after the conversion of RS232/VGA interface modular converter; signal source is connected on the HDCP support equipment with the VGA line, the content that so can use the HDCP key that writes to come the guard signal source prevents by piracy again.

The HDCP key writing station that the utility model provides can fully satisfy the flexibility that the HDCP key writes.What this device adopted is PC RS 232 serial ports writing modes, rather than the HDCP key is solidificated in the memory in process of production, has improved the flexibility of HDCP key ablation process so greatly, has further promoted the utilization of HDCP agreement.

This device adopts the USB supply power mode, only needs to link to each other with the port of this device with the USB port of a common USB line with computing equipment such as PC, just can not need to add in addition power supply adaptor for the power supply of this device.

This device has only used a USB line, one 9 pin RS232 data wire, and a VGA output line, the components and parts such as resistance capacitance of RS232/VGA interface modular converter and a small amount of peripheral circuit, therefore with low cost, be easy to realize.

Based on above-mentioned advantage, the technical scheme that the utility model provides can promote the application of the digital content protection of HDMI, DVI digital interface, promotes the application of HDCP agreement effectively, avoids legitimate interests to be invaded, and strengthens the property right legitimacy.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims

1, a kind of HDCP key writing station links to each other with computing equipment, is used for writing key to the HDCP support equipment, it is characterized in that, comprising:

RS 232 interfaces;

Writing module is used for by the key of RS 232 interfaces reception from described computing equipment, and it is write in the described HDCP support equipment.

2, HDCP key writing station according to claim 1 is characterized in that, also comprises:

The VGA interface;

3, HDCP key writing station according to claim 1 is characterized in that, also comprises:

USB interface;

4, HDCP key writing station according to claim 1 is characterized in that the said write module further comprises:

RS 232/VGA interface modular converter.

5, HDCP key writing station according to claim 4 is characterized in that, the T1OUT pin of described RS232/VGA interface modular converter connects the pin two of described RS 232 interfaces.

6, HDCP key writing station according to claim 5 is characterized in that, the R1IN pin of described RS232/VGA interface modular converter connects the pin 3 of described RS 232 interfaces.

7, HDCP key writing station according to claim 3 is characterized in that the said write module also comprises:

Filter circuit;

Described RS 232/VGA interface modular converter links to each other with described USB interface by filter circuit.

8, HDCP key writing station according to claim 7 is characterized in that, the VCC pin of described RS232/VGA interface modular converter links to each other with the VBUS pin of described USB interface by described filter circuit.

9, HDCP key writing station according to claim 3 is characterized in that the said write module further comprises:

The power supply indicating member.

10, HDCP key writing station according to claim 9 is characterized in that, described power supply indicating member is a light-emitting diode, and its minus earth anodally links to each other with the VBUS pin of described USB interface.