KR100736105B1 - Apparatus and method for contents sharing in ethernet and expandable home theater - Google Patents

Abstract

An apparatus and a method for enabling Ethernet and an XHT(eXpandable Home Theater) to share contents are provided to reduce a cost by simplifying the structure of a home service gateway. A contents server detects a PCR(Program Clock Reference) from certain contents, configures an IEC 61883.4 packet, and transmits an MPEG-2 TS(Transport Stream). A home service gateway(210) obtains the PCR and a TSP(Transport Stream Packet) from the MPEG-2 TS, and converts the MPEG-2 TS into the IEC 61883.4 packet to configure an isochronous packet. A DTV(220) decodes the isochronous packet, the IEC 61883.4 and the MPEG-2 TS to display the contents.

Description

Apparatus and method for contents sharing in Ethernet and eXpandable Home Theater}

1 is a diagram illustrating content sharing between an Ethernet and an expandable home theater according to the prior art.

2 illustrates a content sharing system for an Ethernet and scalable home theater in accordance with an embodiment of the present invention.

3 is a diagram illustrating a content server and a home service gateway according to an exemplary embodiment of the present invention.

4 is a flow diagram of content sharing between an Ethernet and scalable home theater in accordance with an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

200: UPnP device 210: home service gateway

220: DTV 230: Ethernet

240: IEEE 1394

The present invention relates to an apparatus and method for sharing content of a UPnP network in a DTV configured with an XHT network. The present invention relates to a content server in a UPnP network, comprising a configuration of an IEC 61883.4 packet for predetermined AV content, and a home service gateway connecting UPnP and XHT. The present invention relates to an apparatus and method for sharing contents between an Ethernet and an expandable home theater for converting an MPEG-2 TS into an IEC 61883.4 packet, constructing an isochronous packet, and transmitting the same to a DTV.

Recently, the eXpandable Home Theater (XHT) technical standard, middleware for AV Home Networking, has been developed and presented. The XHT technology is a digital TV-centric home network solution developed by Samsung Electronics Co., Ltd. and has been adopted as a standard specification of the Consumer Electronics Association (CEA).

XHT technology uses the IEEE 1394 cable that can stably transmit a number of high definition (HD) signals, and the AV device connected to digital TV using Internet protocol, a communication standard mainly used on the Internet, Allows you to control your digital TV. With XHT technology, you can watch digital broadcasts using the digital broadcast reception function of digital TV in the living room even in the home.

In addition, the low cost network interface unit (NIU) using XHT technology is in the form of a memory card, which makes it easy to change according to the reception method such as terrestrial, satellite, and cable, thereby reducing the economic burden on broadcasters. In particular, XHT technology enables various types of portal services through a browser embedded in digital TV.

UPnP, like scalable home theater, is a kind of home network middleware that aims to provide an easy and convenient communication method between devices and services distributed in various places such as information appliances, wireless communication devices, and PC-related devices. In the network environment without an administrator as described above, it is to provide a method of easily connecting devices or connecting devices and the Internet in a standardized manner without user's work.

In other words, each device can easily connect to the network at any time, letting other devices know their presence and function, communicate or control them, and easily remove them from the network when they are no longer in use.

IEC61883 is a protocol for transmitting real time stream data over IEEE1394. Therefore, the transmission format and protocol are defined for each stream type, and point-point, broadcast, and overlay are based on Plug, Bandwidth, and Channel Register. ) Contains stream connection conventions for connections.

1 is a diagram illustrating content sharing between an Ethernet and an expandable home theater according to the related art.

Content sharing of Ethernet and scalable home theater according to the prior art includes a PC 100, a gateway 130, and a DTV 150.

The PC 100 is a device configured as UPnP and includes a content storage unit 110 for storing AV content and an Ethernet interface 120a for communicating with a gateway.

The gateway serves as a bridge between the Ethernet and the expandable home theater, the Ethernet interface 120b for receiving predetermined content transmitted from the PC 100, and the encryption / decryption for encrypting and decrypting the received predetermined content. And an IEEE 1394 interface for communicating with an expandable home theater (XHT) constituting a home network centered on the DTV 150.

The DTV 150 decrypts predetermined content transmitted from the PC 100 based on the gateway 130 and provides the predetermined content desired by the user to the user.

In the prior art, not only the encryption / decryption unit 140 of the gateway 130 serving as a bridge between the PC 100 and the DTV 150 is composed of hardware, but also between the encryption unit (not shown) and the IEEE 1394 interface. It is composed of hardware to transmit predetermined content.

If the hardware-based encryption / decryption unit 140 is composed of software, it requires a high performance CPU resource and is composed of very complicated and expensive devices, which may cause difficulty in system configuration and financial burden on users. Can be.

The present invention is designed to improve the above problems, the present invention is to share the streaming content provided in the Ethernet network with the expandable home theater to provide the content to the user through the DTV.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a content sharing device between an Ethernet and an expandable home theater according to an embodiment of the present invention detects a PCR (Program Clock Reference) from predetermined content and configures an IEC 61883.4 packet to configure an MPEG-2 TS (Transport). Home service gateway and isochronous, which acquires PCR and TSP (Transport Stream Packet) from a content server and predetermined content, MPEG-2 TS, and converts MPEG-2 TS into IEC 61883.4 packets to form isochronous packets. And a DTV for decoding the IEC 61883.4, the MPEG-2 TS, and displaying the content requested by the user.

In order to achieve the above object, a content sharing method between an Ethernet and a scalable home theater according to an embodiment of the present invention comprises constructing an IEC 61883.4 packet in a content server for a content requested from a DTV, and an MPEG-2 transmitted from a content server. Parsing the TS to obtain PCR and TSP, converting the MPEG-2 TS to the IEC 61883.4 to generate an isochronous packet, and decoding the isochronous packet, IEC 61883.4, MPEG-2 TS to display the user request content Include.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, the general knowledge in the art to which the present invention belongs It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

2 is a diagram illustrating a content sharing system of an Ethernet and an expandable home theater according to an exemplary embodiment of the present invention.

Content sharing system of Ethernet and scalable home theater according to an embodiment of the present invention is a predetermined Universal Play and Plug (UPnP) device 200, Home Service Gateway (hereinafter referred to as HSG) 210, DTV (Digital TV) 220, and may include an Ethernet 230 for connecting the predetermined UPnP device 200 and the HSG 210, and an IEEE 1394 (240) for connecting the DTV 220 and the HSG 210. It may include.

As illustrated, the UPnP device 200 may be predetermined devices including AV content such as DVD and PC, and may serve as a server for storing and managing content. The role as a server will be described in detail later with reference to FIG.

A large number of contents included in such a device are randomly selected by a user's request, and PCR (Program Clock Reference) is applied to arbitrary contents composed of MPEG-2 TS for sharing contents between Ethernet and scalable home theater. Detects and constructs IEC 61883.4 packets based on PCR.

The UPnP device 200 may transmit the MPEG-2 TS and the IEC 61883.4 packet of the content according to the user selection configured above through the Ethernet 230.

The home service gateway 210 temporarily stores the MPEG-2 TS transmitted through the Ethernet 230, detects the presence of the received content, obtains a PCR value for the corresponding content, and determines the TSP of the TSP to be transmitted per cycle. You can define the number.

In addition, the home service gateway 210 may transmit content to the DTV 220 through the IEEE 1394 240 that is the base of the expandable home theater based on the PCR value and the number of TSPs obtained above.

To this end, the home service gateway 210 may convert the MPEG-2 TS into an IEC 61883.4 packet, and configure and transmit an isochronous packet.

The DTV 220 may decode and decode the isochronous packet, IEC 61883.4, and MPEG-2 TS transmitted through the IEEE 1394 240, and provide the same to a user through a display unit (not shown).

That is, the present invention caches a certain portion of IEC 61883.4 configured in the UPnP device without performing encryption and decryption on predetermined content, converts the MPEG-2 TS into IEC 61883.4, and configures an isochronous packet to DTV. Can be sent to the user.

3 illustrates a UPnP device and a home service gateway according to an embodiment of the present invention.

The content server and the home service gateway according to the embodiment of the present invention may configure a network through Ethernet.

As mentioned in FIG. 2, the UPnP device 200 may serve as a server for storing and managing predetermined content, and the Ethernet for transmitting predetermined content of the content server 300 and the content server 300 according to a user request. It may include an interface (S350a).

First, when a request for arbitrary content occurs according to a user request, the file attachment processing unit 310 of the content server 300 may access a plurality of peripheral devices in the UPnP device 200. When the content corresponding to the user request is selected in the file attachment processor 310, the PCR detector 320a may extract a PCR value for the corresponding content.

The PCR value is a time that is a reference for one broadcast channel, and means a time standard commonly used in the TS. If a plurality of data is included in the TS may have a separate PCR, but can usually maintain one PCR.

Such PCR specifies a PCR pid (Program ID) in a PMT (Program Management Table) in the TS, and can receive a PCR / EPCR reference from the pid.

When the PCR for the content is detected by the PCR detector 320a, an IEC 61883.4 packet may be constructed based on these information.

For the IEC 61883.4 packet constructed based on PCR, the following equations may be used.

를 통해 i스트림이 전송되는 총 시간을 구 할 수 있다. 이것은 임의의 j 스트림 PCR과 i스트림의 차를 동기 재생을 위한 STC(System Time Clock)로 나뉜 값을 의미한다.first,

The total time over which the i-stream is transmitted can be obtained through. This means a value obtained by dividing the difference between an arbitrary j stream PCR and an i stream by a system time clock (STC) for synchronous reproduction.

을 이용할 수 있다.Using the above formula, the number of cycles for istream transmission is divided by the total time that istream is transmitted divided by 125us.

Can be used.

The IEEC 61883.4 packet can construct packets for odd-numbered and even-numbered cycles through these two equations.

The following is the formula for packet construction for odd-numbered cycles.

,

, TSP의 수 × 188 바이트-[TSP의 수]=잔여 바이트(bytes)를 통해 구성할 수 있다.

,

, Number of TSP x 188 bytes-[number of TSP] = remaining bytes.

Next is the packet construction formula for even-numbered cycles.

,

를 통해 짝 수번째 사이클에 대한 패킷 구성을 할 수 있다.

,

It is possible to configure the packet for even numbered cycles through.

The IEC 61883.4 packet configured through the above equation may be temporarily stored in the transmission buffer 340a and transmitted to the home service gateway 210 through the Ethernet interface 350a.

The home service gateway 210 may receive IEC 61883.4 and MPEG-2 TS through the Ethernet interface 350b corresponding to the Ethernet interface 350a of the UPnP device 200.

The home service gateway 210 may include a content client 360 and a content manager 380 serving as a cache manager (not shown).

The content client 360 may notify the PCR detector 320b that there is content transmitted from the UPnP device 200 while temporarily storing the IEC 61883.4 and MPEG-2 TS received through the reception buffer 370a. .

The PCR detection unit 320b notified that the transmitted content exists may play a role similar to or identical to that of the PCR detection unit 320a of the content server 300, and thus a detailed description thereof will be omitted.

That is, the content management unit 380 may configure a packet for the IEC 61883.4 in the IEC 61883.4 packet construction unit 330b based on the PCR value and the number of TSPs obtained from the PCR detection unit 320b, and transmit the transmitted MPEG. -2 Convert TS to IEC 61883.4 packet.

At this time, the MPEG-2 TS conversion is to transmit to the DTV 220 based on the IEEE 1394 (240).

The transmission buffer 340b notifies the isochronous packet construction unit 390 that there is an IEC 61883.4 packet while storing the changed IEC 61883.4 packet.

Here, isochronism constitutes a packet capable of both synchronization and asynchronous operation in data communication, and transmits a data frame to the reception side (DTV 220) while maintaining the timing signal sent from the transmission side (home service gateway 210). The transmission mode is called isochronous transmission. Standards such as IEEE 1394, Fiber Channel (FC), and Universal Serial Bus (USB) specify the standardization of the isochronous transfer mode for AV data transmission.

That is, the content requested by the user in the UPnP device 200 is composed of IEC 61883.4 packets and transmitted to the home service gateway 210, and the home service gateway converts the MPEG-2 TS transmitted from the UPnP device 200 to IEC 61883.4. In addition, an isochronous packet may be constructed, and these packets may be transmitted to the user's DTV 220, which may decrypt and decode the packets, and may be provided to the user.

4 is a flowchart of content sharing between an Ethernet and an expandable home theater according to an embodiment of the present invention.

According to an embodiment of the present invention, in a method of sharing content between an Ethernet and an expandable home theater, in a predetermined network environment configured with an expandable home theater, a user may arbitrarily request a predetermined content through the DTV 220 ( S400).

delete

The request for content may be different depending on the configuration of the DTV 220, but a conventional content selection method of an expandable home theater may be used here. That is, the user may select by displaying a plurality of devices connected through a network that can be provided through the display unit of the DTV 220 and contents stored and managed by the corresponding devices.

In response to a user's content request, the UPnP device 200 may configure an IEC 61883.4 packet by defining a PCR value and the number of TSPs in an MPEG-2 TS of predetermined content according to a user's selection (S410). Since the IEC 61883.4 packet configuration has been described above with reference to FIG. 3, a detailed description thereof will be omitted.

If the IEC 61883.4 packet is configured (S410), the packet and the MPEG-2 TS may be transmitted to the home service gateway 210 (S420).

The home service gateway 210 may temporarily store the received content in the reception buffer 350b of the content client 360 and notify the PCR detector 320b that there is content transmitted from UPnP (S430). .

The PCR detection unit 320b notified of the existence of the content may acquire a PCR value and the number of TSPs from the MPEG-2 TS of the transmitted content (S440).

Based on the information obtained here, the packet may be configured in the IEC 61883.4 packet constructing unit 330b (S450) to convert the MPEG-2 TS into an IEC 61883.4 packet. The IEC 61883.4 packet configured as described above may be transmitted from the isochronous packet configuration unit 390 to the DTV 220 which is the final destination (S460).

The DTV 220 may reconvert the MPEG-2 TS by decoding the isochronous packet and IEC 61883.4, and decode the MPEG-2 TS (S470 and S480).

Since this is a typical process, detailed description thereof will be omitted here.

According to the content sharing apparatus and method between the Ethernet and the scalable home theater of the present invention as described above, the content can be viewed without performing separate encryption and decryption on the content existing in the Ethernet. In addition, the configuration of the home service gateway can be simplified to reduce costs.

Claims (5)

A content server that detects a PCR (Program Clock Reference) from predetermined content, constructs an IEC 61883.4 packet and transmits an MPEG-2 TS (Transport Stream); A home service gateway obtaining the PCR and the transport stream packet (TSP) from the MPEG-2 TS, and converting the MPEG-2 TS into the IEC 61883.4 packet to configure an isochronous packet; And And a DTV for decoding the isochronous packet, the IEC 61883.4, and the MPEG-2 TS to display the contents. The method of claim 1, The home service gateway, Ethernet and XHT caching the IEC 61883.4 packet payloaded from the content server, removing and storing the TCP / IP header and the streaming protocol header after caching a predetermined cycle, and constructing an isochronous packet and transmitting the packet to the DTV. Content streaming device in the network. Constructing an IEC 61883.4 packet at the content server for the content requested from the DTV; Parsing MPEG-2 TS transmitted from the content server to obtain PCR and TSP; Converting the MPEG-2 TS into the IEC 61883.4 to generate an isochronous packet; And And decoding the isochronous packet, the IEC 61883.4, and the MPEG-2 TS to display the request content. The method of claim 3, wherein The IEC 61883.4 packet configuration,

To get the total time of the i-stream,

A method of streaming content in an Ethernet and XHT network by acquiring the number of cycles for i-stream transmission and configuring packets of odd-numbered cycles and even-numbered cycles in the MPEG-2 TS. The method of claim 4, wherein The packet configuration of the odd cycle and the even cycle,

,

Configure the odd-numbered cycles by the number of TSP x 188 bytes- [number of TSP] = remaining bytes,

A method of streaming content in Ethernet and XHT networks that constructs packets of odd-numbered cycles based on a.

Images