Abstract:
A streaming service transmitting and receiving device and method are provided. An arrival interval jitter is an arrival delay time variation between TCP packets, which arrive at a device receiving a streaming service. The device receiving a streaming service determines a de-jitter buffering time to absorb a network jitter before TS packets in a TCP packet are inputted into a T-STD buffer model. An initial playback delay time of the device receiving a streaming service is determined by the de-jitter buffering time.
Abstract:
Disclosed are a method and device for an adaptive HTTP streaming service using metadata relating to content. The content metadata can be sent to a terminal after having been effectively allocated to suit the purpose of use of the terminal via general media information or specific media information. A group comprises one or more representations of the content. The metadata comprises a group element, and the group element provides a summary of the attributes of one or more representations comprised in the group.
Abstract:
Disclosed is a Medium Grained Scalability (MGS)-to-Advanced Video Coding (AVC) transform apparatus which modifies an accumulated residual signal of at least one MGS layer of a key picture, included in an MGS-based Scalable Video Coding (SVC) bitstream, and rewrite the MGS-based SVC bitstream into an AVC bitstream.
Abstract:
Provided are a method and apparatus for accessing service discovery metadata. MPEG AIT devices can access discovery metadata of different schemes using an MXM-based generic protocol. End-consumer devices, description service provider devices and IPTV service provider devices can exchange metadata by means of the above-described access method, and further modification and addition of metadata schemes are supported.
Abstract:
An apparatus and method for adapting a scalable video coding (SVC) bitstream is provided. The apparatus (200) may include: a layer selection unit (210) to select at least one quality layer from a plurality of quality layers contained in each of spatial layers of the SVC bitstream; a layer discarding unit (220) to discard the at least one quality layer; and a layer dependency modification unit (230) to modify a quality layer dependency between one or more quality layers remaining among the plurality of quality layers, or a spatial layer dependency between the plurality of spatial layers. Accordingly, it is possible to adapt the SVC bitstream where the entire quality of spatial layers is enhanced.
Abstract:
Disclosed are a method and apparatus for an adaptive HTTP streaming service using media content metadata. The media content consist of a series of periods. The metadata may include a start time attribute and/or a duration attribute for each period. The metadata may determine a start time of each period and a start time of each segment contained in each period. A terminal accesses the segments contained in each period, and performs decoding and rendering processes on the data of the media content contained in the segments, thereby reproducing the media content.
Abstract:
Disclosed are an apparatus and method for providing an adaptive HTTP streaming service using metadata for content. The metadata includes one or more base URL elements. The URL of a segment constituting media is generated on the basis of one or more base URL elements. The URLs of the segment may be generated by mapping any of the one or more base URL elements into a source URL property of the segment. The generated URLs indicate the same segment.
Abstract:
Disclosed are a method and apparatus for an adaptive HTTP streaming service using metadata for media content. The media content consists of a series of one or more periods. Each period may include one or more representations. The metadata may include information that is descriptive of the relationships among the representations, as well as information for terminals having different display bit depths.
Abstract:
Disclosed are an apparatus and method for providing an adaptive HTTP streaming service using metadata for contents. The metadata includes minimum buffering time property indicating the minimum amount of media contents which are initially buffered. A terminal receives contents from a server before playing the contents and buffers the contents by at least the minimum amount. The metadata includes range properties indicating a target range to which a URL points. A terminal receives bytes from the URL which the range properties indicate, and plays the contents using the bytes.
Abstract:
The present invention relates to an apparatus and method for transmitting and receiving a streaming service. The apparatus and method for transmitting and receiving a streaming service involve using a lightweight multimedia file suitable for HTTP streaming. An ISO file that is created by a non-interleaved storage method unsuitable for an HTTP streaming service can be converted, using an HTTP hint track, into a file of an interleaved storage method suitable for an HTTP streaming service. The ISO file may contain multimedia tracks for supporting multiple bit rates and resolutions. Chuck data of media tracks, which provide multiple multimedia qualities, can be efficiently acquired, and the acquired chuck data is stored in an interleaved method, thereby generating a lightweight ISO file suitable for an HTTP streaming service.