METHOD FOR PROVIDING PROGRESSIVE DOWNLOAD SERVICE FOR PLAYBACK APPARATUS SUPPORTING BD-J SPECIFICATION

• US 20110069935A1
• Filed: 09/15/2010
• Published: 03/24/2011
• Est. Priority Date: 09/21/2009
• Status: Active Grant

• Current Assignee: SK Planet Co., Ltd. (SK Telecom Co., Ltd.)
• Original Assignee: Dreamer
• Inventors: BAEK, Wonjang, Kim, John
• Granted Patent: US 8,515,259 B2
• Time in Patent Office: Days
• US Class Current: 386/248
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: H04N 21/4331 Caching operations, e.g. of an advertisement for later insertion during playback
• CPC Class Codes: H04N 21/458 Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations arrangements for replacing or switching information during the broadcast or during the distribution H04H20/10
• CPC Class Codes: H04N 21/854 Content authoring

Abstract

A method for providing a progressive download service for a playback apparatus supporting a BD-J specification is disclosed. In accordance with the present invention, a standby time and a communication overhead necessary for receiving and playing a A/V data by a playback apparatus supporting a BD-J specification are minimized by dividing and playing a first clip and a second clip according to a size of clips.

Claims

1. A method for providing a progressive download service for an A/V data providing server and a playback apparatus supporting a BD-J specification, the method comprising steps of:

(a) preparing an A/V data;

(b) dividing the A/V data into a plurality of clips including a first clip group and a second clip group using a clip division information, wherein the first clip group includes one or more first clips each having a first size and the second clip group includes one or more second clips each having a second size larger than the first size; and

(c) transmitting the plurality of clips from the A/V data providing server to the playback apparatus.

2. The method in accordance with claim 1, further comprising, after carrying out the step (b):

(d) generating a playback sequence information for the plurality of clips so that the one or more first clips are played before the one or more second clips are played; and

(e) transmitting the playback sequence information from the A/V data providing server to the playback apparatus.

3. The method in accordance with claim 2, further comprising receiving from the playback apparatus a clip request according to the playback sequence information, and wherein the step (c) comprises transmitting the plurality of clips to the playback apparatus in response to the clip request.

4. The method in accordance with claim 1, wherein the clip division information comprises at least one of the first size, the second size, a number of the one or more first clips, a media network bandwidth of the A/V data, a customer network bandwidth necessary for transmitting the A/V data to the playback apparatus and a number of buffered clips.

5. The method in accordance with claim 4, wherein a first mathematical expression

6. The method in accordance with claim 4, further comprising:

obtaining the first size, the second size, the media network bandwidth, the customer network bandwidth and the number of buffered clips from the clip division information; and

selecting the number of the one or more first clips satisfying a second mathematical expression

7. The method in accordance with claim 4, further comprising:

obtaining the first size, the number of the one or more first clips, the media network bandwidth, the customer network bandwidth and the number of buffered clips; and

selecting the second size satisfying a third mathematical expression

8. The method in accordance with claim 4, wherein the customer network bandwidth is obtained by establishing a communication with the playback apparatus.

9. The method in accordance with claim 4, wherein the customer network bandwidth is selected from a customer network bandwidth group.