Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

139results about "Transmission sytems characterised arrangements" patented technology

Method for breakpoint continuous transmission of reliable file acceptance (receiving) system based on unidirectional broadcasting network

The invention discloses a method for resuming transmission from a break-point for a reliable file receiving system on the basis of a unidirectional broadcast network, which comprises the following steps: firstly, slicing files to be transmitted according to the fixed size; secondly, attaching offset information and check information to each sliced file; thirdly, submitting a combined application data unit to a reliable multicast layer to split the application data unit into data blocks at the layer; fourthly, coding the data blocks so as to generate corresponding redundant data blocks; and fifthly, transmitting all the data blocks in a scrambled mode by a file transmission service terminal. When a user terminal receives the file, an information index file of the file is created for recording the receiving situation of the file data blocks. When the file receiving is resumed after break, information record files are checked to determine whether the transmission of the file needs to be resumed, and the transmission of the file is resumed according to the attached information. By adopting the method, the file can be received continuously from the break-point and the redundant and time-consuming write operation is skipped over to reduce writing times of a disk to protect the disk, thus the aims of reducing the I / O times and the CPU occupancy rate and saving hardware resource of a receiving end is achieved.
Owner:ZHEJIANG UNIV

Method and an apparatus for transferring a video stream

A method for transferring a video stream having a first resolution from a first user equipment to a second user equipment having a larger screen and being capable of offering a plurality of second resolutions which are higher than said first resolution, wherein one or more third user equipments are also receiving video streams through the same network entity which has a limited bandwidth capacity, said method comprising: performing an optimization operation to determine the second resolution to be selected among said plurality of second resolutions at said target user equipment for the video stream, wherein said optimization operation comprises: using utility functions as an input to said optimizing operation, said utility functions having been determined in advance and respectively indicating for each video stream the quality perceived by a user depending on the resolution of the video stream and the allocated data rate, wherein said optimizing operation calculates a combined quality measure based on the utility functions for said video streams, said combined quality measure being calculated such as to find among the plurality of possible resolutions and data rates which could be assigned to said second user equipment, and among the plurality of possible data rates which could be assigned to the video streams received by said third user equipments after the transfer of said video stream, the resolution and data rates to be assigned to the second and third user equipments after the transfer for which the combined quality measure reaches its optimum or extremum; and selecting the second resolution and the data rates for the streams received by said second and third user equipments after said transfer of said video stream in accordance with the result of the optimization procedure such that the combined quality measure reaches its extremum.
Owner:NTT DOCOMO INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products