KR20060105811A - Display method for video system device using picture by picture - Google Patents

Abstract

The present invention relates to a split screen display method of a video device, and more particularly, to divide and display one consumer screen into a plurality of screens by adding a screen split function to an interface specification between digital devices. According to an aspect of the present invention, there is provided a method of transmitting data by connecting at least one producer and a consumer to a serial bus, wherein the producer and the consumer inform the counterpart device of whether the screen is supported for division and linking. When the connection is started, the consumer displays a list of a plurality of producers connected to the network; when the split screen function is set by a user and a plurality of producers are selected, the consumer notifies the plurality of producers of the screen division setting; The consumer receives streams and OSDs (menu screens) from the selected plurality of producers and displays the corresponding images on each of the divided screens, and the consumer displays the corresponding OSDs on the divided screens corresponding to the user's key operation and sets the user. To transmit the key signal to the producer. The name of a feature.

Description

DISPLAY METHOD FOR VIDEO SYSTEM DEVICE USING PICTURE BY PICTURE}

1 is a control block diagram of a video device using a general DTVLink.

2 is a control configuration diagram of a video device using conventional EIA / CEA-931 and DTVLink.

3 is an exemplary view of a split screen according to the present invention.

4 is a structural diagram of EIA-775-A DTV info for screen division support in an embodiment of the present invention.

FIG. 5 is a structural diagram of a miscellaneous feature field in FIG. 4; FIG.

6 is a structural diagram of EIA-775 Plug info to support screen load in an embodiment of the present invention.

7 is a structural diagram of an ALLOCATE_ATTACH command according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

110,210: Producer 120,220: Consumer

The present invention relates to display screen division, and more particularly, to a split screen display method of a video device.

First, to describe the present invention, the terms are defined as follows.

Picture by Picture (hereinafter, abbreviated as "PBP") is a method of displaying two screens by dividing the screen in half in a wide TV.

On-Screen Display (hereinafter, abbreviated as "OSD") is used to mean a menu screen used to control home appliances.

Producers are A / V sources that send streams and OSD data to control them, such as set-top boxes and DVHS.

A consumer is a device that displays a stream or OSD data sent by a producer. There is a DTV. In this specification, DTV is used in the same sense as a consumer.

The EIA-775-A is a specification for providing a baseband digital interface using an IEEE-1394 bus between a DTV and a producer. It provides a level of functionality similar to that of an analog system. It can also provide compatibility between ETV-compliant DTVs and digital A / V sources such as digital set-top boxes, analog / digital hard disks, and video cassette recorders.

EIA-799 is a standard that defines the OSD format that should be used when transmitting OSD from EIA-775-A.

EIA / CEA-931 is a standard designed to transmit key value through user's remote control input or panel operation to A / C Command.

EIA / CEA-849 is a specification that defines application profiles for DTVs that comply with EIA-775-A. Applications include ATSC terrestrial, DBS (Direct Broadcast Satellite), US Cable, and DV camcorders.

IEEE 1394, a serial bus interface standard jointly proposed by Apple and Texas Instruments in 1986, was developed for large-capacity multimedia data exchange between AV devices and became an industry standard in 1995.

The biggest feature of IEEE 1394 is that it can transmit 100 ~ 400Mbps at high speed, and it is currently being developed to transmit at 800Mbps and 1.6Gbps, so it is possible to directly connect multimedia peripheral devices such as scanner, digital camera, digital video camera, etc. By connecting, you will be able to use digital audio or video information in real time.

In addition, since IEEE 1394 supports asynchronous transfer and isochronous transfer, it is suitable for high-definition video transmission that should guarantee real-time transmission.

The physical advantages of IEEE 1394 include the ability to connect several types of peripherals into a single, simple, common plug-in serial connector and use a thin serial cable rather than a thick parallel cable.

It also supports Hot Plug and Plug and Play for uninterrupted use of the device and the ability to connect peripherals in a variety of ways, without the need for termination or complex setups. .

With the above features, there are more and more products supporting IEEE 1394, including products such as digital camcorders, digital video editing equipment, digital VCRs, digital cameras, digital audio players, 1394 ICs, connectors, cables, and tests. 1394 basic parts such as equipment and software toolkits are being announced one after another, and this trend is expected to continue.

On the other hand, DTVLink is a method using IEEE 1394.

As shown in FIG. 1, when controlling a video device using a general DTVLink, a remote controller or a panel must be operated for each of the devices to control the A / V source device 110 and the DTV 120 connected to the 1394 Link. do.

In this case, the A / V source device 110 transmits the stream and the OSD to be displayed on the screen of the DTV 120.

Accordingly, the user controls the A / V source device 110 while viewing the OSD displayed on the screen of the DTV 120.

In addition, the conventional EIA / CEA-931 and the control of the video device using the DTVLink, as shown in FIG. By using the remote control of various products, you can eliminate the inconvenience. To this end, producers and consumers should be implemented in accordance with the standards of EIA-775-A, EIA / CEA-849, EIA-799, and EIA / CEA-931.

However, in the related art, even if a user wants to display streams and OSDs received from two producers, that is, two A / V sources, on one consumer screen as shown in FIG. There is a disadvantage that you have to take the inconvenience because it is not presented.

Therefore, the present invention divides one consumer screen into a plurality of screens by adding a screen splitting function to an interface specification between digital devices in order to improve the conventional problem. The purpose is to provide a display method.

That is, the first object of the present invention is to easily control the DTVLink producer by displaying the OSD and streams received from the two producers on one consumer screen.

A second object of the present invention is to display a consumer's own screen and a producer's screen on one consumer screen.

The present invention provides a method of transmitting data by connecting at least one producer and a consumer to a serial bus in order to achieve the above object, and if the producer and the consumer are connected, whether to support screen division to an external device; Informing the user, and when the link connection is started, the consumer displays a list of a plurality of producers connected to the network; and when the split screen function is set by the user and a plurality of producers are selected, the consumer splits the selected plurality of producers Informing the setting, the consumer receiving streams and OSDs (menu screens) from the selected plurality of producers, displaying the corresponding images on each of the divided screens, and the consumer corresponding to the divided screens corresponding to the user's key operation. Display the OSD and send the custom key signal to the corresponding producer to The method comprising: characterized in that configured to perform.

In order to execute the above steps, the present invention extends the miscellaneous feature fields of the EIA-775 plug info and DTV info blocks in the EIA-775-A specification so as to check whether the external device supports the screen splitting function. That is, the consumer checks whether the screen split function is supported by using the miscellaneous feature field of the DTV info block, and the producer has an OSD that can be used when using the screen split function by using the reserve field of the EIA-775 plug info. Let them know.

In order to execute the above steps, the present invention defines the number of display scans related to the producer's stream output and OSD overlay characteristics for interlace and progressive when setting the screen division in the DTV info block.

In order to execute the above steps, the present invention allows the user to selectively set the screen division function by using the PBP_EN field of the ALLOCATE_ATTACH command.

In addition, the present invention enables to display the image of the consumer and the image of the producer selected by the user at the same time by selecting at least one producer and the consumer when setting the screen split function to achieve the above object.

Accordingly, in the present invention, the producer and the consumer may be connected to the DTVLink to simultaneously watch at least two or more images displayed by the screen division setting and control the producer corresponding to each split screen through the OSD.

Hereinafter, the present invention will be described in detail with reference to the drawings.

In the embodiments of the present invention, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the technical gist of the present invention will be omitted.

Network for an embodiment of the present invention is configured in the same manner as in FIG.

That is, a 1394 link is connected between the producer 210 and the DTV 220 to transmit a bitmap (OSD), and a key signal by a user is transmitted from the DTV 220 to the producer 210 in the EIA / CEA-931 standard. Configured to deliver.

Although only one producer is shown in FIG. 2, multiple producers may be connected.

Accordingly, in the embodiment of the present invention, the DTV 220 connected to the network of FIG. 2 divides the screen into two, as shown in the example of FIG. 3, and each producer screen includes two producer screens or one producer screen and a DTV ( The operation of displaying one's own screen will be described.

To this end, the present invention extends and defines the function as follows.

In the embodiment of the present invention, in order to determine whether the DTV 220 and the producer 210 support screen division of the external device, the miscellaneous feature fields of the EIA-775 plug info and the DTV info block are included in the EIA-775-A specification. Expand to use.

That is, the DTV 220 indicates that the bit splitting function can be supported by allocating one bit of the miscellaneous feature field of the DTV info block, and the producer 210 uses the splitting function in the reserve field of the EIA-775 plug info. Indicates an OSD can be used.

In addition, according to an embodiment of the present invention, an item related to the number of display scans related to the stream output of the producer 210 and an OSD overlay characteristic is interlaced on the split screen of the DTV 220 using the reserve field of the DTV info block. And progressive items.

That is, when the producer 210 sends the stream, the producer 210 recognizes that the value defined for the double screen is used in the DTV 220, and transmits the OSD and the stream output accordingly.

In an embodiment of the present invention, the user can selectively use the screen division function.

That is, even if the DTV 220 supports the screen division function and the producer 210 has the OSD to be used when the screen division function is used, if the user does not want the screen division function, the PBP_EN field of the ALLOCATE_ATTACH command has a value of "0". Fill it with and send it.

However, when the DTV 220 and the producer 210 establish a connection in a situation in which a screen division function is desired, an ALLOCATE_ATTACH command having a PBP_EN field of “1” should be used.

In addition, the embodiment of the present invention is not limited to viewing the streams and OSDs from two producers on the screen of the DTV 220 at the same time, and the user may view the screen of the DTV 220 and the screen of one producer 210. The same applies to the case of viewing at the same time.

Therefore, in the present invention, the DTVLink transmits an image and an OSD of the DTVLink producer 210, which is an A / V source, to the DTVLink DTV 220 for display on the DTV screen, thereby easily controlling the DTVLink producer 210.

That is, the present invention enables the OSD transmission and control by connecting the DTV 220 having a double screen function and two producers in a network in which a plurality of devices supporting DTVLink are connected through the specification extension.

4 illustrates a DTV info block of EIA-775-A defined in an embodiment of the present invention.

The DTV info block is included when the device is a consumer and displays the supported OSD format, whether to support double buffering, various functions related to DTV, basic video format, analog video conversion format, and the output of the producer 210 on the DTV. In this case, information about the number of video scans and the number of OSD scans is included.

In order to notify the producer 210 that the DTV 220 supports screen division, a PBP support field is newly defined as shown in FIG. 5 in a part of the miscellaneous feature of the DTV info block.

~

영역과

~

영역을 도4와 같이 인터레이스와 프로그레시브 각각에 대한 alignment 데이터를 위한 필드로 할당하여 사용한다. In addition, it is possible to increase the number of video scans and OSD scans used to display the output of the producer 210 in the DTV 220 and the 4: 3 screen to 14: 9 or 16: 9 screen when the screen is divided. Defines properties such as width and height ratio. For this purpose, the producer 210 provides a stream having the resolution of the split screen and an OSD at the time of splitting the screen.

To

Area and

To

As shown in Fig. 4, the area is allocated and used as a field for alignment data for each of the interlace and the progressive.

In addition, in the present invention, the producer 210 notifies the consumer 220 of having the OSD to be used when using the screen division as described above.

영역에 화면 분할 지원 여부를 나타내는 필드를 추가하는 것에 의해 달성하게 된다. 여기서,

필드의 값이 "1"이면 해당 기기가 프로듀서이며, 화면 분할 기능 이용 시에 사용될 OSD를 가지고 있다는 것을 의미한다. This is shown in FIG. 6, in the reserve area of the EIA-775 plug info, which is a component of the unit identifier descriptor of the producer 210.

This is achieved by adding a field indicating whether or not to support screen division in the region. here,

If the value of the field is "1", it means that the device is a producer and has an OSD to be used when using the split screen function.

In other words, as described above, whether the split screen is supported in each of the EIA-775 plug info and the DTV info blocks can be determined whether the split screen is supported according to the role of the producer and the consumer.

On the other hand, even if the consumer 220 may support the screen division function and the producer 210 has an OSD to be used when using the screen division function, the user decides whether to use the screen division function.

Therefore, as shown in FIG. 7, the ALLOCATE_ATTACH command is extended to use the existing res field as the PBP_EN field.

Only when the user selects a corresponding device to use the screen division function of the producer 210, the consumer 220 transmits the PBP_EN field of the ALLOCATE_ATTACH command to “1” and transmits it to the producer 210.

Accordingly, the producer 210 checks the value of the PBP_EN field of the ALLOCATE_ATTACH command, checks whether the consumer 220 requests the use of the screen division function, and transmits the corresponding OSD to the consumer 220.

Therefore, the screen splitting process using the function defined above is described as follows.

When a user presses a hot key or starts DTVLink using the GUI of the consumer 220, a list of producers connected to the consumer 220 is displayed on the screen of the consumer 220.

In this case, the consumer 220 supporting the screen division function also displays whether or not each producer supports screen division.

Thus, it is possible to achieve three cases.

1. The producer 210 controls the producer 210 through the OSD received from the producer 210 while viewing the screen of the producer 210 selected by the user in full screen.

This process is the same as that of the conventional DTVLink, and the consumer 220 transmits the PBP_EN field of the ALLOCATE_ATTACH command to the producer 210 by setting a value of "0", and the producer 210 uses the screen division function. Instead of transmitting the stream and OSD to be used for the general purpose, the general stream and the OSD are transmitted to the consumer 220.

2. The user can display and view the image provided by the producer 210 selected by the user and the image provided by the consumer 220 on each of the divided screens.

In this case, for example, a consumer who can watch air broadcasting and a producer that is a cable set-top box are connected.

This process is necessary for split screen support, and the consumer transmits the PBP_EN field of the ALLOCATE_ATTACH command with a value of "1".

~

영역(PBP align for interlace) 또는

~

영역(PBP align for progressive)에 정의된 비디오 스캔 수와 OSD 스캔 수에 맞추어 스트림과 OSD 데이터를 컨슈머(220)에 전송하여 사용자가 한 화면을 통해 DTV의 화면과 프로듀서(210)의 화면을 볼 수 있게 한다. 이후, 프로듀서(210)의 OSD를 통해 그 프로듀서(210)를 제어할 수 있다. Accordingly, the producer 210 of the DTV info block of the consumer 220

To

PBP align for interlace or

To

Streams and OSD data are sent to the consumer 220 in accordance with the number of video scans and OSD scans defined in the area (PBP align for progressive) so that the user can view the screen of the DTV and the screen of the producer 210 on one screen. To be. Thereafter, the producer 210 may be controlled through the OSD of the producer 210.

3. When two producers are connected to the consumer 220, each producer is controlled through an OSD from each producer while displaying and viewing the images provided by the two producers on each of the divided screens through screen division.

At this time, the process of establishing an asynchronous connection for transmitting the OSD using the ALLOCATE_ATTACH command having the PBP_EN field of “1” is performed in the same manner as in the second case.

However, in this process, by connecting with two producers, the new plug IDs defined in EIA-775 plug info of FIG. 6 are used.

In addition, in the second and third cases, when a remote controller key to be transmitted to the producer is input, the consumer 220 sends an EIA to the producer that has connected to the screen having the current control focus through a screen change key for selecting one of the two divided screens. It transmits the corresponding remote control key command based on / CEA-931.

If the consumer 220 confirms the remote control key and checks the function of the remote controller, the consumer 220 executes a function corresponding to the remote control key.

Although described above with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and changes to the present invention without departing from the spirit and scope of the invention described in the claims below Could be.

As described in detail above, the present invention provides a screen splitting function so that the consumer can control the corresponding producer through each OSD while watching the images transmitted from the two producers.

In addition, the present invention can control the producer using the OSD transmitted by the producer while simultaneously watching the image of the consumer and the image provided by the producer.

In other words, when DTVLink is applied to wide-screen DTVs that are spreading gradually, images played on DVD players and set-top boxes that support EIA-775-A can be simultaneously viewed on a single screen, or broadcasted by producers and broadcasters of DTV. It is possible to watch the images at the same time, and can be controlled through each OSD to provide the user with ease of operation as well as to improve the satisfaction.

Claims (8)

A method of transmitting data by connecting at least one producer and a consumer to a serial bus, When the producer and the consumer are connected, informing the counterpart device whether or not to support split screen; When the link is initiated, the consumer displays a list of multiple producers connected to the network; When the split screen function is set by the user and a plurality of producers are selected, the consumer notifies the plurality of selected producers of the split screen setting; And a consumer receiving the streams from the selected plurality of producers and displaying a corresponding image on each of the divided screens. The method of claim 1, wherein the consumer displays the corresponding OSD received simultaneously with the stream on the split screen in response to a user's key operation, and transmits and controls a user setting signal to the producer. Split screen display method of the video device. The method of claim 1, wherein the serial communication method Method for displaying a split screen of an image device, characterized by IEEE 1394 based DTVLink. The method of claim 1, wherein the step of notifying whether the screen split is supported Setting whether the consumer supports split screen in the miscellaneous feature field of the DTV info block; A method for displaying a split screen of a video device, characterized in that the producer sets the presence or absence of an OSD to be used for setting the split screen in the EIA-775 plug info. The method of claim 4, wherein the EIA-755 plug info is A split screen display method for a video device, comprising: a screen split OSD identification name, a screen split analog video input / output identification name, and a screen split digital transport stream identification name, in addition to information indicating whether or not an OSD is to be used when setting a split screen. The method of claim 4, wherein the DTV info block A method of displaying a split screen of a video device, comprising information on whether a split screen is supported, the number of video scans, the number of OSD scans, screen format conversion, and pixel properties. The screen splitting setting of claim 1, wherein And assigning a screen division setting field to the ALLOCATE_ATTACH command of the IEEE 1394 standard, and determining the split screen according to the setting value of the field. The method of claim 1, wherein the screen split function A method for displaying a split screen of a video apparatus, characterized in that the selection is made of at least two producers or at least one producer and a consumer.

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