ITU-T, SG15/WP15/1, LBC-95-309, National Semiconductor Corporation, \Sub-Videos with Retransmission and IntraRefreshing in Mobile/Wireless Environments", Oct. 1995.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....it can be dicult to transmit complete frames without any errors. In this case, the most recent error free frame can be very old and hence ine ective for MCP. Therefore, the Independent Segment Decoding (ISD) mode as described in Annex R of H.263 has been speci ed. The ISD mode was suggested in [16]. In the ISD mode, the video sequence is partitioned into sub videos that can be decoded independently from each other. A popular choice is to use a group of blocks (GOB) as a sub video. In a QCIF frame, a GOB usually consists of a row of 11 macroblocks [2] The ISD mode signi cantly reduces the ....

ITU-T, SG15/WP15/1, LBC-95-309, National Semiconductor Corporation, \Sub-Videos with Retransmission and IntraRefreshing in Mobile/Wireless Environments", Oct. 1995.

....can be difficult to transmit complete frames without any errors. In this case, the most recent error free frame can be very old and hence ineffective for MCP. Therefore, the independent segment decoding (ISD) mode as described in Annex R of H.263 has been specified. The ISD mode was suggested in [16]. In the ISD mode, the video sequence is partitioned into subvideos that can be decoded independently from each other. A popular choice is to use a group of blocks (GOB) as a subvideo. In a QCIF frame, a GOB usually consists of a row of 11 macroblocks [2] The ISD mode significantly reduces the ....

ITU-T, SG15/WP15/1, LBC-95-309, National Semiconductor Corporation, "Sub-videos with retransmission and intra-refreshing in mobile/wireless environments,", Oct. 1995.

....it can be dicult to transmit complete frames without any errors. In this case, the most recent error free frame can be very old and hence ine ective for MCP. Therefore, the Independent Segment Decoding (ISD) mode as described in Annex R of H.263 has been speci ed. The ISD mode was suggested in [18]. In the ISD mode, the video sequence is partitioned into sub videos that can be decoded independently from each other. A popular choice is to use a group of blocks (GOB) as a sub video. In a QCIF frame, a GOB usually consists of a row of 11 macroblocks [4] The ISD mode signi cantly reduces the ....

ITU-T, SG15/WP15/1, LBC-95-309, National Semiconductor Corporation, \Sub-Videos with Retransmission and IntraRefreshing in Mobile/Wireless Environments", Oct. 1995.

....whose capacities are often less than 19.2 Kb s [10] this range of operation is also very conducive. Not surprisingly then, in addition to traditional telephony, there has been a significant and growing interest in the extension of the H. 263 standard to mobile and wireless applications [11] 12] [13]. This circumstance further motivates the mode selection strategy of this paper which offers benefits in addition to excellent rate distortion behavior, such as the ability to adjust rapidly to channels with time varying capacity. This paper is organized as follows. In Section 2.1, we first ....

....of iterations which introduces additional delay to the encoded bitstream if a single target rate is desired for the entire frame. This may be viewed as a disadvantage in certain environments such as wireless networks. For example, in many implementations of H. 263 for mobile applications [12] [13], feedback channels from the decoder to encoder are employed to better react to changing channel conditions, in which case the round trip delay from encoder to decoder becomes an important issue. As an alternative, we have considered a variety of potential approaches including a frame to frame ....

ITU-T, SG15 WP15/1, LBC-95-309, National Semiconductors Corporation, "Subvideos with retransmission and intra-refreshing in mobile/wireless environments", Oct. 1995.

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