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This would increase the link layer overhead and thereby decrease the effective payload rate. (...) The scheme also requires an initialization period, where all headers are sent uncompressed, this time is approximately the round-trip time of the connection. Packetization overhead in UMTS protocol stack: · Overhead per RLC PDU = RLC frame header (4 bytes) = 4 bytes · Overhead per PDCP PDU = PDCP packet header (1 byte) + length info (1 byte) = 2 bytes Packetization overhead in CDMA-2000 protocol stack: · Overhead per RLC PDU = RLC frame header (2 bytes) = 2 bytes · Overhead per PPP PDU = PPP packet header (3 bytes) + bit stuffing (~2% of payload)+compressed RTP/UDP/IP header (3 bytes) Simulation Software Simulation software will be available on the standard ftp-site. (...) It is up to the experimenter to ensure, that the packetized video stream with the added simulator packetization overhead and optional RLC retransmission overhead fits into the available radio bearer.
Language:English
Score: 1150215.5 - https://www.itu.int/wftp3/av-a...deo-site/0104_Aus/VCEG-M77.doc
Data Source: un
Network licensing: multiplex loading Overhead Overhead Overhead Overhead 100% 0% 20% 40% 60% 80% HD General (Ch 9) SD General KidsSD HD General (Ch 3) SD News SD General HD General (Ch 7) SD News SD General KidsSD HD General SD News SD General SD PBS SD PBS SD General SD PBS KidsSD SD News SD General SD PBS SD PBS SD PBS SD PBS SD News Audio Data 26 .2 M bi t/s SD CS SD CS Audio Data SD CS SD CS SD CS SD CS SD CS SD CS SD CS SD News SD News Audio Data Audio Data Audio Data Overhead Overhead SD CS HD PBS (T PBS) HD PBS (T PBS2) HD PBS HD PBS (Ch 5) 10 s er vi ce s Audio/Data HD General HD General HD General SD General HD PBS SD ??
Language:English
Score: 1145638.3 - https://www.itu.int/en/ITU-D/R...land/Session2B_Peter_Walop.pdf
Data Source: un
id_prod=5350\" target=\"_blank\">Site","summary":"Recommendation ITU-T G.709/Y.1331 defines the requirements for the optical transport network (OTN) interface signals of the optical transport network, in terms of:\n–\tOTN hierarchy\n–\tfunctionality of the overhead in support of multi-wavelength optical networks\n–\tframe structures\n–\tbit rates\n–\tformats for mapping client signals.\nEdition 6.3 of this Recommendation adds specifications for OTUk, k=0, references to specific bit patterns that may appear in Status and Payload Type overhead fields during the presence of the FlexO Squelch text pattern [ITU-T G.709.1], a clarification of the ODU Locked maintenance signal and an enhancement of the introductory text in annex L. (...) Edition 6.3 of this Recommendation adds specifications for OTUk, k=0, references to specific bit patterns that may appear in Status and Payload Type overhead fields during the presence of the FlexO Squelch text pattern [ITU-T G.709.1], a clarification of the ODU Locked maintenance signal and an enhancement of the introductory text in annex L.
Language:English
Score: 1142229.3 - https://www.itu.int/t/aap/recdetails/10175
Data Source: un
The bigger data quantum could result in unwanted memory bandwidth overhead while the data is being transferred. Additional memory cycles may be required when the data to be referenced is lying across different memory banks. (...) Based on the extended block partition, the overhead ratio relative to each block size is calculated in Table 1, where the overhead ratio is defined as follows: (overhead ratio) = (# of needed pixels for interpolation of a block partition) / (# of pixels of a block partition). (...) Extended block partitions from 4x4 to 64x64 Table 1. Overhead ratio of motion compensation to its size for each block size Block Size Overhead Ratio Block Size Overhead Ratio Block Size Overhead Ratio Block Size Overhead Ratio Y C Y C Y C Y C Y C Y C Y C Y C 64x64 32x32 1.16 1.06 32x32 16x16 1.34 1.13 16x16 8x8 1.72 1.27 8x8 4x4 2.64 1.56 64x32 32x16 1.25 1.10 32x16 16x8 1.52 1.20 16x8 8x4 2.13 1.41 8x4 4x2 3.66 1.86 32x64 16x32 1.25 1.10 16x32 8x16 1.52 1.20 8x16 4x8 2.13 1.41 4x8 2x4 3.66 1.86 4x4 2x2 5.06 2.25 3 Memory bandwidth estimate The memory bandwidth for motion compensation could be represented with or without memory compression respectively as follows: (memory bandwidth) = (average bitrate of motion compensation in a frame) x (frame rate) or (average number of pixels to be referenced in a frame) x (bit width per pixel) x (frame rate).
Language:English
Score: 1141138 - https://www.itu.int/wftp3/av-a...010_07_B_Geneva/JCTVC-B086.doc
Data Source: un
Due to the fact that KLT is improving substantially on sequences exhibiting diagonal textures and does not degrade performance on other ones it is proposed to be retained in the set of prediction error coding methods for I frames. 2.2 Combined coding of overhead information for I frames Proposed algorithm uses joint coding of coded/not coded information together with the signaling of zero/nonzero DC difference, at macroblock level. (...) Simulation results showing the impact on coding performance when joint coding of overhead information in intra is used are given in document q15k32b.xls. (...) Due to the simple nature & complexity of such joint coding of overhead we included this change to the proposed intra coding scheme.
Language:English
Score: 1138719.9 - https://www.itu.int/wftp3/av-a...video-site/0008_Por/q15k32.doc
Data Source: un
With our from the data plane within the TSN domain, the delay is empirically chosen parameters, the maximum delays is constant (around 4 s) throughout the simulation run. capped to approximately 100 s which is suitable for the Stream registration and reservation introduce some con‑ considered topology and time‑critical ST traf ic that re‑ trol plane overhead. Fig. 9 shows the signaling overhead. quires less than 1 ms of delay. More speci ically, the overhead is measured as the signal‑ While QoS metrics are important, another factor that de‑ ing traf ic rate in Mbit/s at the CNC for both incoming and termines the performance gains is the admission ratio outgoing control (CDT) traf ic. (...) Fig. 8 shows the stream admission ratio ration introduces more signaling overhead; however, Eth‑ for both recon iguration and no recon iguration.
Language:English
Score: 1136392.3 - https://www.itu.int/en/publica...1/files/basic-html/page39.html
Data Source: un
With our from the data plane within the TSN domain, the delay is empirically chosen parameters, the maximum delays is constant (around 4 s) throughout the simulation run. capped to approximately 100 s which is suitable for the Stream registration and reservation introduce some con‑ considered topology and time‑critical ST traf ic that re‑ trol plane overhead. Fig. 9 shows the signaling overhead. quires less than 1 ms of delay. More speci ically, the overhead is measured as the signal‑ While QoS metrics are important, another factor that de‑ ing traf ic rate in Mbit/s at the CNC for both incoming and termines the performance gains is the admission ratio outgoing control (CDT) traf ic. (...) Fig. 8 shows the stream admission ratio ration introduces more signaling overhead; however, Eth‑ for both recon iguration and no recon iguration.
Language:English
Score: 1136392.3 - https://www.itu.int/en/publica...1/files/basic-html/page39.html
Data Source: un
Transporting these signals over more than a single OTU2r link is for further study. 8.1 OPU2r overhead description The OPU2r overhead includes the payload structure identifier (PSI) including the payload type (PT), the OPU2r multiframe identifier (OMFI) and client mapping specific overhead. The OPU2r PSI, PT and OMFI overhead locations are shown in Figure 8-1. 634     639     640     641     642     643     644     645     646     647     648     649          
Language:English
Score: 1135321.9 - https://www.itu.int/en/publica.../files/basic-html/page644.html
Data Source: un
Fine adjustments could be done with Dquant, however there is a costly signaling overhead required. Moreover, adjustment can only be done on MB by MB basis. (...) This directly leads to a demand to perform a finer adjustment with significantly reduced signaling overhead. The introduced algorithm allows for a much smoother adjustment on a 4x4 block basis. (...) Smooth adjustment of bitrate is possible without noticeable signaling overhead. Depending on the parameter settings degradation of subjective picture quality is avoided by exploiting masking effects.
Language:English
Score: 1135321.9 - https://www.itu.int/wftp3/av-a...e/2001_12_Pattaya/VCEG-O35.doc
Data Source: un
Fine adjustments could be done with Dquant, however there is a costly signaling overhead required. Moreover, adjustment can only be done on MB by MB basis. (...) This directly leads to a demand to perform a finer adjustment with significantly reduced signaling overhead. The introduced algorithm allows for a much smoother adjustment on a 4x4 block basis. (...) Smooth adjustment of bitrate is possible without noticeable signaling overhead. Depending on the parameter settings degradation of subjective picture quality is avoided by exploiting masking effects.
Language:English
Score: 1135321.9 - https://www.itu.int/wftp3/av-a...deo-site/0112_Pat/VCEG-O35.doc
Data Source: un