Method, encoder and decoder for the transmission of digital signals which are hierarchically structured into a plurality of parts
First Claim
1. Method for the transmission of digital signals, comprising the following steps:
- forming at least two data channels each carrying data packets and eventually header data including priority information, the channels including picture data having different levels of error protection, wherein the data packets within a channel have the same level of error protection and wherein a superordinate channel has a higher error protection than a subordinate channel;
transmitting priority information of a subordinate channel in a superordinate channel, that priority information allowing, following erroneous reception of said digital signals, an improved recovery of picture data decoding.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for the transmission of digital signals comprises the steps of forming at least two data channels carrying data packets, and eventually header data. The channels have different levels of error protection and include picture data, wherein the data packets within one of the channels have the same level of error protection, and wherein a super-ordinate channel has a higher error protection than a subordinate channel. Important information of a subordinate channel is then transmitted in a super-ordinate channel. The important information allows following erroneous reception of the digital signals an improved recovery of picture data decoding.
-
Citations
10 Claims
-
1. Method for the transmission of digital signals, comprising the following steps:
-
forming at least two data channels each carrying data packets and eventually header data including priority information, the channels including picture data having different levels of error protection, wherein the data packets within a channel have the same level of error protection and wherein a superordinate channel has a higher error protection than a subordinate channel; transmitting priority information of a subordinate channel in a superordinate channel, that priority information allowing, following erroneous reception of said digital signals, an improved recovery of picture data decoding. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An encoder for encoding hierarchically transmitted digital signals in a plurality of subchannels, including superordinate subchannels having higher error protection than subchannels which are subordinate to said superordinate subchannels comprising;
-
source coders for hierarchically coding said digital signals into a plurality of partial signals comprising data packets, header data, and picture data; a multiplexer for combining data of said partial signals to form a data stream; means for dividing said data stream into said plurality of subchannels each having different error protection in a channel interface, wherein part of said digital signals which logically belong to one of said subordinate subchannels including header data and picture data are transmitted in at least one of said superordinate subchannels. - View Dependent Claims (8)
-
-
9. A decoder for decoding hierarchically transmitted digital signals in a plurality of subchannels comprising superordinate subchannels, having higher error protection than subchannels that are subordinate to said superordinate subchannels, comprising:
-
channel interface means for combining said digital signals of said plurality of subchannels, each having different error protection levels to form a data stream; a de-multiplexer for splitting said data stream into a plurality of partial signals, wherein part of said digital signals including header data and picture data which logically belong to one of the subordinate subchannels are transferred from at least one superordinate subchannel back into said subordinate subchannel to form video signals. - View Dependent Claims (10)
-
Specification