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Method and apparatus for hierarchical transmission/reception in digital broadcast

A technology of digital broadcasting and hierarchical modulation, used in digital transmission systems, devices that provide special services in branches, transmission systems, etc.

Inactive Publication Date: 2008-05-14
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with this resolution we will have to limit the number of services, since there is not enough capacity in the LP for higher resolution streams

Method used

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  • Method and apparatus for hierarchical transmission/reception in digital broadcast
  • Method and apparatus for hierarchical transmission/reception in digital broadcast
  • Method and apparatus for hierarchical transmission/reception in digital broadcast

Examples

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Embodiment approach

[0023] For many media compression schemes, individual bit strings of encoded media can be assigned categories of importance, hereafter referred to as priorities. In coded video, for example, non-predictively coded information (intra pictures) has priority over predictively coded information (inter pictures). For inter pictures, those pictures that are used for prediction of other inter pictures (reference pictures) have priority over those that are not used for future prediction (non-reference pictures). Some audio coding schemes need to give codebook (codebook) information to start replaying content, and here the packets carrying the codebook have higher priority than the content packets. When using MIDI, instrument definitions have priority over actual real-time MIDI streams. Based on the examples presented, a person skilled in the art should be able to easily identify different priorities in the media encoding scheme.

[0024] Priorities can also be established based on "...

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PUM

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Abstract

In accordance with various aspects of the invention, there is being provided a method and apparatus for transmitting, and a method and apparatus for receiving a digital broadcast signal including a hierarchical modulation having a high priority stream and a low priority stream. The content to be received or transmitted in encoded into two stream so that a first stream is configured to be transmitted or received with the high priority stream, and a second stream to be transmitted / received with the low priority stream is configured to contain additional information for increasing the bitrate of the first stream.

Description

technical field [0001] The invention relates to a device for transmitting and / or receiving digital broadcast signals using hierarchical modulation. Furthermore, the invention relates to the use of such devices. Background technique [0002] Broadcasting of multimedia content, especially TV content, to battery-operated handheld devices, such as cellular mobile phones or PDAs, is considered a promising business opportunity today. [0003] Digital broadband wireless broadcasting technologies such as DVB-H (Digital Video Broadcasting - Handheld), DVB-T (Digital Video Broadcasting - Terrestrial), T-DMB (Digital Multimedia Broadcasting - Terrestrial), T-DMB (Digital Multimedia Broadcasting Terrestrial) and Technologies such as MediaFLO (forward link only) can be used to build this service. There are many international forums and R&D projects dedicated to standardization, evaluation and lobbying of technology and business opportunities, such as: CBMS (Convergence of Broadcast and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04H20/57H04H60/76H04N21/63H04H1/00H04H20/28
CPCH04L12/189H04H20/28
Inventor J·瓦勒H·J·珀科南T·奥拉南M·昂尼克塞拉P·塔尔莫拉J·弗斯马
Owner NOKIA CORP
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