TWM520211U - Signal processing device - Google Patents

Description

Signal processing device

The present invention provides a signal processing device, in particular, a signal processing device electrically connected between a multimedia device and a plurality of display devices.

In recent years, due to the rapid development of multimedia audio and video technology, various multimedia devices, video playback devices or display devices with different functions of video transmission have appeared on the market. Among them, to ensure that the digital image and sound data is not illegally copied when transmitted through the DVI or HDMI interface. As a result, Intel has developed a high-definition digital content protection (HDCP) key specification mechanism.

Basically, you want to play audio and video content protected by high-definition digital content protection (HDCP) keys, such as HD DVD, Blu-ray Disc, PlayStation 3 games (when output via HDMI), multimedia devices (signal source) and Both display devices must have a built-in high-definition digital content protection (HDCP) key chip for normal playback. If any one of the system is not equipped with this key chip, the image quality may be degraded or even the image may not be played.

However, as the high-definition digital content protection (HDCP) key specification mechanism is continuously updated or changed, it often causes incompatibility between multimedia devices (signal sources) and display devices, cannot play audio and video content, or cannot Normal communication verification; or the multimedia device or display device during the warranty period needs to be updated online; or the multimedia device or display device that exceeds the warranty period needs to be replaced. Therefore, it is inconvenient to use.

The present invention provides a signal processing device for performing communication verification with a multimedia device and a display device through an audio-video receiving unit and an audio-video transmitting unit, thereby improving the usability of the signal processing device.

The present invention provides a signal processing device electrically connected between a multimedia device and a plurality of display devices. The signal processing device includes an input interface, a video and audio receiving unit, a plurality of audio and video transmission units, a plurality of output interfaces, and a control unit. The input interface is used to electrically connect the multimedia device. The video receiving unit is electrically connected to the input interface, and the video receiving unit has a first set of high quality digital content protection (HDCP) key specifications and a second set of high quality digital content protection (HDCP) key specifications. A plurality of audio and video transmission units are respectively electrically connected to the video and audio receiving unit, and each of the audio and video transmission units has a first group of high quality digital content protection (HDCP) key specifications and a second group of high quality digital content protection (HDCP) gold. Key specification. The plurality of output interfaces are electrically connected to one of the corresponding video transmission units, and each of the output interfaces is electrically connected to one of the corresponding display devices. The control unit is electrically connected to the video receiving unit and each of the audio and video transmitting units. The control unit is configured to determine the video signal to control the communication verification operation between the video receiving unit and the multimedia device. And the control unit is configured to determine the display signal to control the communication verification operation between each of the video transmission units and one of the display devices. Wherein, when the multimedia device is electrically connected to the input interface, the video and audio receiving unit switches to the first group of high quality digital content protection (HDCP) key specifications and the second group according to the discrimination result of the audio and video signals transmitted by the multimedia device. One of the High Quality Digital Content Protection (HDCP) key specifications is used as the key to communication. When one of the display devices is electrically connected to one of the output interfaces, the video transmission unit switches to the first group of high pictures according to the determination result of a display signal transmitted by one of the display devices. One of the Quality of Digital Content Protection (HDCP) key specifications and the second set of High Quality Digital Content Protection (HDCP) key specifications is used as the key to communication. When it is determined that the video signal belongs to the first group of high quality digital content protection (HDCP) key specifications, the control unit controls the video receiving unit to the first group of high pictures. The Quality of Digital Content Protection (HDCP) key specification is used as the key of communication. When it is determined that the video signal belongs to the second group of high quality digital content protection (HDCP) key specifications, the control unit controls the video receiving unit to be the second group. The Quality of Digital Content Protection (HDCP) key specification is used as the key to communication. When it is determined that the display signal belongs to the first group of high quality digital content protection (HDCP) key specifications, the control unit controls each video transmission unit to use the first set of high quality digital content protection (HDCP) key specification as the communication gold. The control unit controls the video transmission unit to use the second group of high quality digital content protection (HDCP) key specifications as communication when discriminating that the display signal belongs to the second group of high quality digital content protection (HDCP) key specifications. Key.

The specific means of the present invention is to use a signal processing device to perform communication verification with the multimedia device through the first or second set of high quality digital content protection (HDCP) key specifications of the video receiving unit, and through the video transmission unit. The first or second set of high quality digital content protection (HDCP) key specifications are used for communication verification with the display device, thereby improving the usability of the signal processing device.

In order to further understand the techniques, methods and effects of this creation, please refer to the following detailed description and drawings of the creation. The above description of the creation and the description of the following embodiments are for further explanation. The technical means of creation and the achievement of the effect, but the embodiments and drawings described are provided for reference only, and are not intended to limit the creation.

8a, 8b, 8c‧‧‧ display devices

9‧‧‧Multimedia device

10, 10a‧‧‧ signal processing device

100‧‧‧Video Receiver

102‧‧‧Control unit

104‧‧‧Control unit

110, 120, 130‧‧‧ audio and video transmission unit

I1‧‧‧ input interface

IO1, IO2, IO3‧‧‧ output interface

K1‧‧‧The first set of high quality digital content protection (HDCP) key specifications

K2‧‧‧Second Group of High Definition Digital Content Protection (HDCP) Key Specifications

FIG. 1 is a functional block diagram of a signal processing apparatus according to an embodiment of the present invention.

2 is a functional block diagram of a signal processing apparatus according to another embodiment of the present invention.

FIG. 1 is a functional block diagram of a signal processing apparatus according to an embodiment of the present invention. Please refer to Figure 1. A signal processing device 10 electrically connected to a multimedia device Between 9 and a plurality of display devices 8a and 8b, the signal processing device 10 includes an input interface I1, a video receiving unit 100, a plurality of audio and video transmitting units 110 and 120, and a plurality of output interfaces IO1 and IO2. A control unit 102 and a manipulation unit 104.

In practice, the video receiving unit 100 is electrically connected between the video transmitting units 110 and 120 and the input interface I1. Each of the video transmission units 110 and 120 is electrically connected between the video receiving unit 100 and one of the output interfaces IO1 and IO2.

In detail, the signal processing device 10 is, for example, a video distributor or a video matrix. For convenience of explanation, the present embodiment is explained by a video and audio distributor. A signal processing device 10 of a video distributor or a video matrix can be freely designed according to the technical spirit of the present embodiment. This embodiment does not limit the aspect of the signal processing device 10.

The multimedia device 9 is configured to provide an audio and video signal, and the video signal is processed by the signal processing device 10 for image processing, key communication, and distribution, and then transmitted to the display devices 8a and 8b, so that the display devices 8a and 8b display the video and audio signals. This embodiment does not limit the operation of the multimedia device 9, the signal processing device 10, and the display devices 8a, 8b.

The input interface I1 is used to electrically connect the multimedia device 9. The output interfaces IO1 and IO2 are electrically connected to one of the corresponding video transmission units 110 and 120, and the output interfaces IO1 and IO2 are electrically connected to the corresponding display devices 8a and 8b. one. In practice, the input interface I1 and each of the output interfaces IO1 and IO2 are one or a combination of a digital video interface (DVI), a high-resolution multimedia video interface (HDMI), and a digital video interface (DisplayPort). This embodiment does not limit the aspect of the input interface I1 and the output interfaces IO1, IO2.

For convenience of explanation, the first set of High Definition Digital Content Protection (HDCP) Key Specification K1 of the present embodiment is a high definition digital content protection (HDCP) 1.4 key specification. And the second set of High Definition Digital Content Protection (HDCP) Key Specification K2 is described as a high quality digital content protection (HDCP) 2.2 key specification. That is, The first set of high quality digital content protection (HDCP) key specification K1 is different from the second set of high quality digital content protection (HDCP) key specification K2.

In other embodiments, the first set of high quality digital content protection (HDCP) key specification K1 is, for example, a high quality digital content protection (HDCP) 2.2, 2.1 or 2.0 key specification. The second set of High Definition Digital Content Protection (HDCP) Key Specification K2 is, for example, a High Definition Digital Content Protection (HDCP) 1.4, 2.0 or 2.1 key specification. This embodiment does not limit the aspects of the first and second sets of high quality digital content protection (HDCP) key specifications K1, K2.

The video receiving unit 100 is electrically connected to the input interface I1. The video receiving unit 100 has a first set of high quality digital content protection (HDCP) key specification K1 and a second set of high quality digital content protection (HDCP) key specification. K2. In practice, the video receiving unit 100 is configured to receive the video signal output by the multimedia device 9, and select the first group and the second group of high quality digital content protection (HDCP) key specification K1 according to the result of determining the video signal. One of K2 is the key to communication.

For example, the multimedia device 9 is a video content for providing a high-definition digital content protection (HDCP) 1.4 key specification. Therefore, the video receiving unit 100 selects the first group of high quality digital content protection (HDCP) key specification K1 as the communication key based on the result of discriminating the video signal. Therefore, the video and audio signals output by the multimedia device 9 can be transmitted to the respective video and audio transmission units 110 and 120 via the video and audio receiving unit 100.

The video receiving unit 100 is, for example, an analog display, and the analog display is switched to the first group of high quality digital content protection (HDCP) key specification K1 and the second group of high quality digital content protection (HDCP) according to the discrimination result of the video signal. One of the key specifications K2 is used as a communication key, and the decoded video and audio signals are transmitted to the respective video transmission units 110 and 120.

Next, the plurality of audio and video transmission units 110 and 120 are electrically connected to the video and audio receiving unit 100, respectively, and each of the audio and video transmission units 110 and 120 has a first group of high quality digital content protection (HDCP) key specifications K1 and second. Group high quality digital Content Protection (HDCP) Key Specification K2. In practice, each of the video transmission units 110, 120 is for transmitting video and audio signals to the display devices 8a, 8b. When a communication link is established between each of the audio-video transmitting units 110 and 120 and the display devices 8a and 8b, each of the audio-video transmitting units 110 and 120 selects the first group and the second group of high-definition digital content protection according to the result of determining the display signal. One of the (HDCP) key specifications K1, K2 is used as the key for communication.

Each of the audio-video transmitting units 110 and 120 is, for example, an analog multimedia source, and each of the analog multimedia source switches to the first group of high-definition digital content protection (HDCP) key specifications K1 and the second group according to the discrimination result of the display signal. One of the high quality digital content protection (HDCP) key specifications K2 is used as a communication key, and the video transmission units 110 and 120 are based on the first set of high quality digital content protection (HDCP) key specification K1 and the second group of high pictures. One of the prime bit content protection (HDCP) key specifications K2 to re-encode the decoded video signal and thereby generate a playback signal to the display devices 8a, 8b, and the display devices 8a, 8b are based on the first set of high quality One of the Digital Content Protection (HDCP) Key Specification K1 and the second High Quality Digital Content Protection (HDCP) Key Specification K2 is used to display the playback signal.

For example, the display device 8b is a display function for providing a high-definition digital content protection (HDCP) 2.2 key specification. Therefore, the video and audio transmission unit 110, 120 selects the second group of high quality digital content protection (HDCP) key specification K2 as the communication key based on the result of discriminating the display signal. Therefore, the display device 8b can display the content of the video signal output by the multimedia device 9.

The control unit 102 is electrically connected to the video receiving unit 100 and the respective video transmitting units 110 and 120. The control unit 102 is configured to determine the video signal to control the communication verification operation between the video receiving unit 100 and the multimedia device 9, and the control unit 102 is configured to determine the display signal to control the video transmission units 110 and 120 and the display devices. The communication verification operation between one of 8a and 8b.

In practice, control unit 102 is implemented, for example, by a central processing unit, a microprocessor, a controller, a control chip, or a control circuit. The control unit 102 is used to discriminate the shadow The audio number belongs to the first group of high quality digital content protection (HDCP) key specification K1 or the second group of high quality digital content protection (HDCP) key specification K2. If it is determined that the video signal belongs to the first group of high quality digital content protection (HDCP) key specification K1, the control unit 102 controls the video receiving unit 100 to use the first group of high quality digital content protection (HDCP) key specification K1. . Similarly, if it is determined that the video signal belongs to the second group of high quality digital content protection (HDCP) key specification K2, the control unit 102 controls the video receiving unit 100 to use the second group of high quality digital content protection (HDCP). Key specification K2.

In addition, the control unit 102 is also configured to determine that the display signal belongs to the first group of high quality digital content protection (HDCP) key specification K1 or the second group of high quality digital content protection (HDCP) key specification K2. If it is determined that the display signal belongs to the first group of high quality digital content protection (HDCP) key specification K1, the control unit 102 controls the video transmission unit to use the first group of high quality digital content protection (HDCP) key specification K1. Similarly, if it is determined that the display signal belongs to the second group of high quality digital content protection (HDCP) key specification K2, the control unit 102 controls the video transmission unit to use the second group of high quality digital content protection (HDCP) gold. Key specification K2.

The control unit 104 is electrically connected to the control unit 102. The manipulation unit 104 is configured to receive a manipulation command and transmit it to the control unit 102. The control unit 102 switches the communication verification operation between the video receiving unit 100 and the multimedia device 9 according to the manipulation command, or switches the communication verification operation between each of the video transmission units 110 and 120 and one of the display devices 8a and 8b. .

In practice, the manipulation unit 104 is implemented, for example, by a button, a switch, an infrared manipulation interface, a Bluetooth manipulation interface, or other wireless control interface. This embodiment does not limit the aspect of the manipulation unit 104. Therefore, the user can set the communication key of the video receiving unit 100 of the signal processing device 10 or set the communication key of each of the video transmitting units 110 and 120.

Based on the above, when the multimedia device 9 is electrically connected to the input interface I1, the video receiving unit 100 determines the knot based on an audio signal transmitted by the multimedia device 9. In effect, one of the first set of high quality digital content protection (HDCP) key specification K1 and the second set of high quality digital content protection (HDCP) key specification K2 is switched as a communication key.

When it is determined that the video signal belongs to the first group of high quality digital content protection (HDCP) key specification K1, the control unit 102 controls the video receiving unit 100 to use the first group of high quality digital content protection (HDCP) key specification K1 as The communication key 102 controls the video receiving unit 100 to protect the second set of high quality digital content (HDCP) when the video signal belongs to the second group of high quality digital content protection (HDCP) key specification K2. The key specification K2 is used as the key for communication.

When one of the display devices 8a, 8b is electrically connected to one of the output interfaces IO1, IO2, the video transmission unit 110, 120 transmits a display signal according to one of the display devices 8a, 8b. The discriminating result is switched to one of the first group of high quality digital content protection (HDCP) key specification K1 and the second group of high quality digital content protection (HDCP) key specification K2 as a communication key.

When it is determined that the display signal belongs to the first group of high quality digital content protection (HDCP) key specification K1, the control unit 102 controls each of the video transmission units 110, 120 to use the first set of high quality digital content protection (HDCP) keys. The specification K1 is used as the communication key. When it is determined that the display signal belongs to the second group of high quality digital content protection (HDCP) key specification K2, the control unit 102 controls the video transmission unit 110, 120 to use the second group of high quality digital bits. Content Protection (HDCP) Key Specification K2 is used as the key to communication. This embodiment does not limit the operation of the signal processing device 10.

2 is a functional block diagram of a signal processing apparatus according to another embodiment of the present invention. Please refer to Figure 2. The signal processing device 10a of FIG. 2 is similar in structure to the signal processing device 10 of FIG. 1, and the same components that are included in the following are denoted by the same reference numerals. The difference between the signal processing devices 10a, 10 is that the signal processing device 10a includes a plurality of video transmission units 110, 120, 130 and a plurality of Output interfaces IO1, IO2, IO3. Each of the output interfaces IO1, IO2, and IO3 is electrically connected to a display device 8a, 8b, and 8c. This embodiment does not limit the aspect of the signal processing device 10a.

For example, three display devices 8a, 8b, 8c, such as A, B, and C, respectively, have display functions for providing high-quality digital content protection (HDCP) 2.2, 1.4, and 2.2 key specifications. The video transmission unit 110 communicates with the display device 8a through a second set of high quality digital content protection (HDCP) key specification K2. The video transmission unit 120 communicates with the display device 8b through the first group of high quality digital content protection (HDCP) key specification K1. The video transmission unit 130 communicates with the display device 8c through the first group of high quality digital content protection (HDCP) key specification K1.

Briefly, in this case, the respective processing operations of the first group or the second group of high-definition digital content protection (HDCP) key specifications K1 and K2 of the video transmission units 110, 120, 130 are accelerated to speed up the display of the back end. The video and audio speeds of the devices 8a, 8b, 8c are displayed. That is to say, the three display devices 8a, 8b, and 8c, such as A, B, and C, can display the contents of the video and audio signals at the same time, and there is no phenomenon of delaying or asynchronously displaying the audio and video content.

It is worth mentioning that the multimedia device 9 is used, for example, to provide audio and video content of a high quality digital content protection (HDCP) 1.4 key specification. Among them, the multimedia device 9 is compatible with the B display device 8b, but the multimedia device 9 is not compatible with the A and C display devices 8a, 8c. Therefore, the multimedia device 9 switches the operation through the signal processing of the signal processing device 10a so that the contents of the audio and video signals are displayed on the display devices 8a, 8b, and 8c. This embodiment does not limit the operation of the signal processing device 10a.

In summary, the multimedia device can be compatible with some of the display devices, or the multimedia device can be incompatible with some of the display devices. The present invention is a signal processing device that performs communication verification with a multimedia device through a first or second set of High Definition Digital Content Protection (HDCP) key specifications of the AV receiving unit, and transmits the first group through the AV transmission unit. Or a second set of High Definition Digital Content Protection (HDCP) key specifications to verify communication with the display device to overcome incompatibilities And improve the ease of use of the signal processing device. In addition, the present work speeds up the display video and audio speed of each display device at the back end by separately processing the first or second group of high quality digital content protection (HDCP) key specifications. That is to say, the display devices can display the content of the video and audio signals at the same time, and there is no phenomenon of delaying or asynchronously displaying the audio and video content. In this way, the creation can overcome the problem of incompatibility between the multimedia device and the display devices, and improve the display speed and convenience of the signal processing device.

This creation has already met the requirements of the new patent and applied in accordance with the law. However, the above disclosures are only preferred embodiments of the present invention, and the scope of rights of the present invention cannot be limited thereto. Therefore, the equal changes or modifications made according to the scope of the application of the present application are still covered by the present application.

8a, 8b‧‧‧ display devices

9‧‧‧Multimedia device

10‧‧‧Signal processing unit

100‧‧‧Video Receiver

102‧‧‧Control unit

110, 120‧‧‧Video transmission unit

I1‧‧‧ input interface

IO1, IO2‧‧‧ output interface

K1‧‧‧The first set of high quality digital content protection (HDCP) key specifications

K2‧‧‧Second Group of High Definition Digital Content Protection (HDCP) Key Specifications

Claims (4)

A signal processing device is electrically connected between a multimedia device and a plurality of display devices. The signal processing device includes: an input interface for electrically connecting the multimedia device; and a video receiving unit electrically connected to the input Interface, the video receiving unit has a first set of high quality digital content protection (HDCP) key specifications and a second set of high quality digital content protection (HDCP) key specifications; a plurality of audio and video transmission units, respectively Electrically connecting the video receiving unit, and each of the video transmitting units has the first set of high quality digital content protection (HDCP) key specifications and the second set of high quality digital content protection (HDCP) key specifications; The control unit is electrically connected to the video receiving unit and each of the audio and video transmitting units, and the control unit is configured to determine the video signal to control a communication verification operation between the video receiving unit and the multimedia device, and the control unit is used by the control unit Determining the display signal to control a communication verification operation between each of the video transmission unit and one of the display devices; and a plurality of inputs The interface is electrically connected to one of the corresponding video transmission units, and each of the output interfaces is electrically connected to one of the corresponding display devices; wherein the multimedia device is electrically connected to the input device In the interface, the video receiving unit switches to the first set of high quality digital content protection (HDCP) key specifications and the second set of high quality digital content according to the discrimination result of the audio and video signals transmitted by the multimedia device. One of the protection (HDCP) key specifications is used as a communication key, and when the video signal belongs to the first group of high quality digital content protection (HDCP) key specifications, the control unit controls the video receiving unit to The first set of high quality digital content protection (HDCP) key specification is used as a communication key, and the control unit is determined when the video signal belongs to the second group of high quality digital content protection (HDCP) key specifications. Controlling the video receiving unit with the second group of high pictures a quality digital content protection (HDCP) key specification is used as a communication key; wherein, when one of the display devices is electrically connected to one of the output interfaces, the video transmission unit is configured according to one of the display devices Transmitting a display signal to determine the result of switching to the first set of high quality digital content protection (HDCP) key specifications and the second set of high quality digital content protection (HDCP) key specifications a key, when the display signal belongs to the first set of high quality digital content protection (HDCP) key specifications, the control unit controls each of the video transmission units to protect the first set of high quality digital content ( The HDCP) key specification is used as a communication key. When it is determined that the display signal belongs to the second group of high quality digital content protection (HDCP) key specifications, the control unit controls the video transmission unit to be the second group high. The Quality of Digital Content Protection (HDCP) key specification is used as the key to communication. The signal processing device of claim 1, wherein the input interface and each of the output interfaces are a digital video interface (DVI), a high resolution multimedia audio interface (HDMI), and a digital video interface (DisplayPort). One or a combination. The signal processing device of claim 1, wherein the signal processing device is a video distributor or a video matrix. The signal processing device of any one of claims 1 to 3, wherein the first set of high quality digital content protection (HDCP) key specifications is a high quality digital content protection (HDCP) 1.4 key specification, The second set of High Definition Digital Content Protection (HDCP) key specifications is the High Definition Digital Content Protection (HDCP) 2.2 key specification.