KR20130088640A - Panorama broadcasting system based on file casting - Google Patents

Abstract

PURPOSE: A file casting based panorama broadcasting system is provided to support efficient consumption of broadcast media, by linking the existing broadcasting network with a communication network for consumption of high quality and multi-functional media. CONSTITUTION: A broadcast receiving apparatus of a receiver receives P frame and/or B frame locator information, and downloads P frame and/or B frame data according to the specific time and slice position from a file server (S310, S320). The apparatus stores connection information in the file server (S330). The apparatus connects to the file server or peripheral servers, and receives a desired frame selectively from a terminal of the other receiver who downloads contents (S340). The apparatus combines I frame provided through the broadcasting network and the P frame and/or the B frame, and then plays one panorama contents (S350). [Reference numerals] (AA) Start; (BB) End; (S310) Receive P or B frame locator information stored in a file server through broadcasting program guiding information or panorama contents transmitted in real time; (S320) Download P or B frame data according to specific time and slice position by connecting to the file server using received locator information by a viewer; (S330) Store terminal connection information (Connection IP, locator information of download contents, and others) in the file server; (S340) Periodically connect to the file server or peripheral servers, and selectively receive a desired frame from peripheral servers which downloads the contents; (S350) Combine I frame provided through a broadcasting network and the P (or B) frame and play as one panorama contents; (S360) Request and download a corresponding frame from the peripheral servers or the file server if there is no corresponding frame when a user changes a screen from a left side to a right side

Description

File casting-based panorama broadcasting system {PANORAMA BROADCASTING SYSTEM BASED ON FILE CASTING}

The present invention relates to a broadcast system, and more particularly, to a method for efficiently transmitting and receiving large-capacity video / audio data in a panoramic broadcast system.

Increasing needs of gray space residents' green space, development of large TV panel technology, and price reductions require the development of large screen-based broadcasting and communication convergence media service technology suitable for the evolution of living space, such as TVs being built into residential spaces. In line with this technological paradigm shift, consumers 'desire for more realistic and realistic broadcasting is on the rise, and panoramic services that provide wider angles of view than humans' perspectives are critical elements that can increase realism for consumers. .

When such a panoramic characteristic is combined with audio and video (AV), it can provide a new sense of realism that is different from the realism of 3D and ultra high definition (UHD).

Meanwhile, in order to support panorama characteristics of an AV system that is widely provided, a technical solution may be required to solve a problem in size of a screen and to process an increased data.

The technical problem to be solved by the present invention relates to a method for efficiently transmitting and receiving a large amount of video / audio data in a panoramic broadcast system.

In one aspect, a method of reproducing panoramic broadcast content by a broadcast receiving device is provided. The method receives a broadcast signal from a broadcast network, wherein the broadcast signal is a locator for an I frame (Intra frame) in which the panorama broadcast content is divided into vertical slice units and a P frame (Predicted frame) generated based on the I frame. (locator) information, accessing a file server through a network to obtain the P frame stored in the file server based on the locator information, and stores the access information in the file server, the access information is the broadcast And the locator information on the IP address and the P frame of the receiving device, and combining the I frame and the P frame to play the panorama broadcast content. If the reference screen of the panoramic broadcasting content is changed, and the frame for the changed reference screen is not provided, the method may further include receiving the network from the file server or another broadcast receiving device, the P frame for the changed reference screen. Can be.

Digital broadcasting is changing to high quality and multifunctional media. Especially in the broadcasting communication convergence environment, it is possible to provide higher quality, multi-quality and multi-functional media services than the existing broadcasting media through interworking with communication networks including the Internet.

An embodiment of the present invention proposes a method for supporting the consumption of broadcast media efficiently by interworking an existing broadcast network and a communication network in order to consume high quality and multifunctional media such as panoramas. That is, the user is provided with the minimum panorama content through the limited bandwidth, and receives the P frame and / or the B frame according to the left and right view change of the viewer before or during the broadcast program from the neighboring broadcast receiver or the file server. This allows efficient reception and consumption of panorama content with limited bandwidth.

According to the embodiment of the present invention, the degree of freedom to use information that enables the use of high-quality interactive content regardless of the terminal may be improved by reducing the information use option to the receiver.

1 is a diagram illustrating an example of a panoramic screen that may be provided as broadcast content.
2 is a diagram illustrating a method of receiving panorama content according to an embodiment of the present invention.
3 is a flowchart illustrating a panorama content receiving method according to an embodiment of the present invention.
4 is a block diagram illustrating a broadcast receiving apparatus to which an embodiment of the present invention can be applied.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when an element is referred to as " comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. In addition, the term " "... The term “unit”, “module”, “unit”, etc. refer to a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

1 is a diagram illustrating an example of a panoramic screen that may be provided as broadcast content.

Referring to FIG. 1, it can be seen that it is impossible to simultaneously play all regions of panorama content on a conventional digital TV due to the size and ratio of the screen. Therefore, in order to consume panorama contents, it was common for a viewer to watch only a desired portion while moving an image from side to side. That is, if the portion of the panorama content being played is displayed as the reference screen, the reference screen may be changed left and right by the viewer.

In such a panorama broadcast consumption environment, it is not only impossible to transmit all of the high quality panorama content to the current limited broadcast channel but also unnecessary.

The present invention separates and transmits panoramic content into a main channel based on a broadcasting network and a sub channel based on a communication network, and in particular, in a communication network, a load of a main server on a communication network is reduced and clouded through a file casting method. We propose a method for efficiently receiving panorama content on a network basis.

In order to consume efficient panorama content in a limited consumption environment, a technique of encoding and decoding in units of vertical slices is required as shown in FIG. 1.

2 is a diagram illustrating a method of receiving panorama content according to an embodiment of the present invention.

Referring to FIG. 2, the panorama content is transmitted through a broadcasting network (blue) and a communication network (red).

I frame stands for Intra Frame, which is a key frame. It can come anywhere in the data stream constituting the content and is essential for random access of the data. Encoded without reference to other images. I frames use the Clean Image Compression Method (JPEG), but unlike JPEG, real-time compression is performed in MPEG. I frame compression has the lowest compression rate in MPEG.

P frame is an abbreviation for Previous or Predicted frame. P frame is a frame composed based on the information of the previous I frame. In other words, the difference value is encoded by using a very small difference between the previous screen and the current screen.

B frame stands for Bidirectional frame. The B frame is a frame constructed based on information of previous I frames and P frames.

As a broadcasting network, as shown in FIG. 1, only I frames (I-1) to (I-8), which are all I frames, are encoded among panorama contents encoded in a vertical slice unit, and (P-1) to a communication network such as a clouding network. Receive a P or B frame such as (P-8). To this end, the P or B frame locator information stored in the file server together with the panorama content transmitted to the broadcasting network should be able to be shared among the receivers (viewers or broadcast receiving devices).

The P or B frame locator information stored in the file server may be downloaded by the terminal in advance through the broadcast program guide information or transmitted in the form of additional data together with the panorama broadcast.

If both P and B frame information can be received before the real-time broadcast, the receiver can seamlessly consume the video at all time points. However, the receiver can consume only a limited area when downloading at the same time as the live broadcast is in progress. If the receiver has sufficiently downloaded the P and B frames, the receiver can consume the panorama content while moving the view to the left and right.

The receiver connects to the communication network to download the P frame and / or B frame necessary for the reproduction while playing the panorama content composed of the I frame pieces transmitted through the broadcasting network. The recipient can download the P frame and / or B frame directly from the file server or receive it from other recipients in the vicinity.

In order for a receiver to download a P frame and / or B frame directly from a file server, or to download from another receiver, the receiver must be able to obtain locator information for the P frame or B frame. Hereinafter, a method of supporting playback of panorama content by a receiver will be described in detail with reference to FIG. 3.

3 is a flowchart illustrating a panorama content receiving method according to an embodiment of the present invention.

Referring to FIG. 3, the receiver receives P frame and / or B frame locator information (S310). The receiver may receive corresponding locator information through broadcast program guide information or panorama content transmitted in real time.

The receiver accesses the file server based on the received locator information and downloads P frame and / or B frame data according to a specific time and slice position (S320).

The receiver stores the connection information on a file server. In this case, the access information may be an access IP of the receiver, locator information of the downloaded content, etc. (S330). The recipient storing the connection information in the file server may allow other recipients to receive P frames and / or B frames based on the connection information, or the recipient may receive P frames and / or B frames based on the connection information stored by other recipients. To receive a B frame.

The receiver periodically accesses a file server or other recipients to selectively receive a desired frame from another receiver that has downloaded content (S340).

The I frame provided to the broadcasting network and the P frame and / or B frame are combined and reproduced as one panorama content (350).

When the receiver changes the screen from side to side, if the frame does not exist, the receiver requests and downloads the frame from other neighboring receivers or file servers (S360). That is, when a viewpoint change event occurs, the position information of the frame is recognized and the frame is downloaded from a neighboring receiver or file server.

When the request is made by downloading the corresponding frame, operation S350 may be performed to reproduce the panorama content.

As described above, in downloading a P frame and / or a B frame, the receiver may be downloaded directly from a file server or downloaded through another receiver. The basis for downloading P frames and / or B frames is the access information stored in the file server by each receiver. As a result, the receiver can determine how to most efficiently download the P frame and / or B frame based on the access information connected to the file server. The receiver prioritizes the data related to the P frame and / or B frame from the recipient who is expected to have the highest download rate among other recipients who have downloaded the P frame and / or B frame from the file server (time, area of interest, Receive according to available bandwidth, etc.).

4 is a block diagram illustrating a broadcast receiving apparatus to which an embodiment of the present invention can be applied.

Referring to FIG. 4, the broadcast reception device 400 includes a display unit 410, an interface unit 420, and a processor 430.

The display unit 410 is a unit capable of displaying the received panorama content and other broadcast content. The display unit 410 may be configured to display visual information processed by combining the content itself or other information with the content itself transmitted from the interface unit 420. The processed visual information may be information processed by combining an I frame with a P frame and / or a B frame.

The interface unit 420 performs access through a broadcasting network and a communication network. The interface unit 420 supports the operation of the broadcasting network to receive the I frame through the broadcasting network. The interface unit 420 may be configured to receive a P frame and / or B frame from a file server through a communication network or to receive a P frame and / or B frame from another broadcast receiving device. The interface unit 420 may include a communication module for supporting a terminal communication service, a wired / wireless local area communication service, a satellite communication service, and the like for supporting a communication network.

The processor 430 may be functionally combined with the interface unit 420 and the display unit 410. The processor 430 may be configured to implement the embodiments of the present invention described above with reference to FIGS. 1 to 3. The processor 430 may be configured to display the panorama content by combining the broadcast content received through the interface unit 420, that is, the I frame, the P frame, and / or the B frame.

The above-described embodiments include examples of various aspects. While it is not possible to describe every possible combination for expressing various aspects, one of ordinary skill in the art will recognize that other combinations are possible. Accordingly, it is intended that the invention include all alternatives, modifications and variations that fall within the scope of the following claims.

Claims (1)

In the method of playing the panorama broadcast content by the broadcast receiving device,
Receives a broadcast signal from a broadcast network, wherein the broadcast signal is a locator for an I frame (Intra frame) divided into vertical slice units and a P frame (Predicted frame) generated based on the I frame Contains information,
Accessing a file server through a network to obtain the P frame stored in the file server based on the locator information,
Storing access information in the file server, wherein the access information includes an IP address of the broadcast reception device and the locator information for the P frame, and
Combining the I frame and the P frame to play the panorama broadcast content,
If the reference screen of the panorama broadcasting content is changed and a frame for the changed reference screen is not provided, further comprising receiving the network from the file server or another broadcast receiving device, the P frame for the changed reference screen; How to play panoramic broadcast content.

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