Abstract:
A priority-differential non-uniform raptor coding method is provided to enable different objects to use independent parity codes by using a raptor code, which is included in a 3GPP(The 3 Generation Project Partnership) MBMS(Multimedia Broadcast and Multicast Service). An input symbol of the data to be encoded is received(1010). A priority of the data of the input symbol is checked(1020). Selection probabilities of respective symbols are set according to the priorities of the respective symbols, which are included in the input symbol(1030). The input symbol with the selection probabilities is encoded to generate an output symbol(1040). A packet is generated by using the output symbol(1050). An audio or voice stream has a higher priority than a video stream. An intra frame has a higher priority than a predictive frame. The predictive frame has a higher priority than a bi-directional frame. A header or a DC value in an intra frame has a higher priority than other data. The header and a motion vector value in the predictive frame have higher priorities than other data.
Abstract:
A cross exclusive OR based redundancy picture slice production method, a loss slice restoration device using the same, and a method thereof are provided to produce a cross exclusive OR based redundancy picture slice by associating basis picture slices through an exclusive OR operation according to a code set and edge pattern. A code set, recording the number of basis picture slices and number of redundancy picture slices, and an edge pattern, recording the location of the basis picture slice used for the production of the redundancy picture slice, are set(801). According to the set edge pattern, an exclusive OR operation is performed for basis picture slices of a corresponding location. Redundancy picture slices of the number corresponding to the set code set are generated(802). Corresponding production information is inserted into a header of the generated redundancy picture slice(803).
Abstract:
PURPOSE: An apparatus and a method for transmitting stereoscopic image data according to the priority for improving the service quality are provided to additionally transmit parity according to the priority. CONSTITUTION: A contents storage(111) supplies encoded contents. A channel monitoring unit(112) performs monitoring toward the state of the transmission channel. An extractor(113) selects the data by determining a priority group based on the reference number. A transmission unit transmits the parity generated with the selected data.
Abstract:
A cross exclusive OR based redundancy picture slice production method, a loss slice restoration device using the same, and a method thereof are provided to produce a cross exclusive OR based redundancy picture slice by associating basis picture slices through an exclusive OR operation according to a code set and edge pattern. A code set, recording the number of basis picture slices and number of redundancy picture slices, and an edge pattern, recording the location of the basis picture slice used for the production of the redundancy picture slice, are set(801). According to the set edge pattern, an exclusive OR operation is performed for basis picture slices of a corresponding location. Redundancy picture slices of the number corresponding to the set code set are generated(802). Corresponding production information is inserted into a header of the generated redundancy picture slice(803).