Patents by Inventor Timothy S. Stevens
Timothy S. Stevens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9961395Abstract: The invention presents a method of providing a modified manifest to a video client for streaming a video sequence associated with the manifest. An original manifest is modified to replace references to locations of lower quality, or bit rate, segments with references to equivalent segments at a higher quality, or bit rate, if the higher quality segment is cached locally. Then, when the video client determines that a given quality of segment should be streamed, it uses the modified manifest to retrieve the appropriate reference for that segment, and if a replacement has taken place, will be provided with the reference to the replacement segment at the higher quality. Thus, the client will always be provided with the highest possible quality segment taking into account local caching.Type: GrantFiled: July 31, 2014Date of Patent: May 1, 2018Assignee: BRITISH TELECOMMUNICATIONS public limited companyInventors: Ian B Crabtree, Timothy S Stevens, Brahim Allan, Rory S Turnbull
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Patent number: 9807628Abstract: A loss of connection between a wireless access point and a network is reported to a network-based service platform by the wireless access point by automatically establishing wireless contact with a second wireless access point, and transmits a predetermined fault report message to a predetermined network platform address by way of the second wireless access point and the second network interface. Authentication credentials are stored in the access point allowing automatic access to the service platform without user intervention, to allow the report to be generated without user intervention. The message may include data on recent usage of the access point, or may be repeated when a user attempts to use the access point, in order to prioritize the fault reported at the service platform.Type: GrantFiled: October 31, 2014Date of Patent: October 31, 2017Assignee: BRITISH TELECOMMUNICATIONS public limited companyInventors: Timothy S Stevens, Andrew G Davis
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Publication number: 20160360430Abstract: A loss of connection between a wireless access point and a network is reported to a network-based service platform by the wireless access point by automatically establishing wireless contact with a second wireless access point, and transmits a predetermined fault report message to a predetermined network platform address by way of the second wireless access point and the second network interface. Authentication credentials are stored in the access point allowing automatic access to the service platform without user intervention, to allow the report to be generated without user intervention. The message may include data on recent usage of the access point, or may be repeated when a user attempts to use the access point, in order to prioritise the fault reported at the service platform.Type: ApplicationFiled: October 31, 2014Publication date: December 8, 2016Inventors: Timothy S STEVENS, Andrew G DAVIS
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Publication number: 20160182941Abstract: The invention presents a method of providing a modified manifest to a video client for streaming a video sequence associated with the manifest. An original manifest is modified to replace references to locations of lower quality, or bit rate, segments with references to equivalent segments at a higher quality, or bit rate, if the higher quality segment is cached locally. Then, when the video client determines that a given quality of segment should be streamed, it uses the modified manifest to retrieve the appropriate reference for that segment, and if a replacement has taken place, will be provided with the reference to the replacement segment at the higher quality. Thus, the client will always be provided with the highest possible quality segment taking into account local caching.Type: ApplicationFiled: July 31, 2014Publication date: June 23, 2016Inventors: Ian B CRABTREE, Timothy S STEVENS, Brahim ALLAN, Rory S TURNBULL
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Patent number: 9105299Abstract: A method and apparatus for encoding media content. In the field of video compression, temporal compression generates I-frames and dependent P-frames and B-frames. The placement of I-frames is determined by the presence of scene switches in the video. In order to improve the ability of a user to seek to interesting parts of the video, a video encoder considers semantic data identifying narrative points of interest within the video. The encoding process generates encoded video data having I-frames present at scene transitions and also at narratively interesting parts of the video.Type: GrantFiled: March 20, 2009Date of Patent: August 11, 2015Assignee: BRITISH TELECOMMUNICATIONS public limited companyInventors: Timothy S Stevens, Joshan Meenowa, Dale Robertson, Ian C Kegel, Ivan Roper
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Patent number: 8838590Abstract: Metadata is associated with media elements in a content store during automatic composition of media articles. The metadata includes relationship data indicating how what is portrayed by that media element relates to what is portrayed by one or more other media elements. Because relationship metadata is included media articles can be generated automatically with the need for the production of a detailed framework describing that media article.Type: GrantFiled: September 15, 2003Date of Patent: September 16, 2014Assignee: British Telecommunications public limited companyInventors: Timothy S Stevens, Alex SJ Palmer, Ian C Kegel, Jeremy M Thorne, Louie KS Lim, Ludvig Lohse, Martin Russ, Jason Morphett, Adam Hay
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Publication number: 20110304627Abstract: A method of processing a non-linear narrative article to improve a user's interactive experience is described. A user watching the narrative article can select options during presentation which influence subsequently viewed media clips associated with the selected options. The user navigates a single downstream path through the many possible paths in the narrative. In addition to downstream non-linear navigation, at each navigational decision point, upstream parts of the non-linear narrative are identified and the user is presented with upstream navigation options to enable non-linear upstream navigation through the narrative.Type: ApplicationFiled: February 26, 2010Publication date: December 15, 2011Inventors: Ian C Kegel, Timothy S Stevens, Joshan Meenowa, Ivan Roper, Dale E Robertson
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Publication number: 20110270889Abstract: A method and apparatus for generating a non-linear narrative article. After generation of a non-linear narrative article from a set of narrative rules and accompanying media elements, the narrative is optimised and the media elements are also optimised into a dictionary. A narrative tree generator determines all possible paths through the narrative to generate a narrative tree and redundant parts are removed.Type: ApplicationFiled: December 24, 2009Publication date: November 3, 2011Inventors: Timothy S. Stevens, Joshan Meenowa, Dale Robertson, Ivan Roper, Ian Kegel
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Patent number: 8037105Abstract: A computer apparatus which uses a database (22) to offer persistent storage of metadata (36) describing the content of media files (32). Metadata is used to create a personalized media article (48) from those media files. That metadata also indicates relationships between those media files. In order to accelerate the creation of the personalized media article (48), media element metadata items are stored in a cache. The usefulness of this cache is improved further by reading related media elements data from retrieved metadata items (36), and then pre-fetching those items and placing them in the cache. Because the relatedness of the data items means that the related data item is more likely to be required in the near future, the caching method is more useful than known caching methods. Furthermore, the improved usefulness of the cache is achieved without placing constraints on where the data items are placed in the persistent storage.Type: GrantFiled: March 18, 2005Date of Patent: October 11, 2011Assignee: British Telecommunications public limited companyInventors: Ian C Kegel, Jeremy M Thorne, Martin Russ, Timothy S Stevens, Jason Morphett
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Publication number: 20110026610Abstract: A method and apparatus for encoding media content. In the field of video compression, temporal compression generates I-frames and dependent P-frames and B-frames. The placement of I-frames is determined by the presence of scene switches in the video. In order to improve the ability of a user to seek to interesting parts of the video, a video encoder considers semantic data identifying narrative points of interest within the video. The encoding process generates encoded video data having I-frames present at scene transitions and also at narratively interesting parts of the video.Type: ApplicationFiled: March 20, 2009Publication date: February 3, 2011Inventors: Timothy S. Stevens, Joshan Meenowa, Dale Robertson, Ian C. Kegel, Ivan Roper
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Patent number: 4927539Abstract: An anion-exchange chromatographic packing composition which comprises:a substrate which consists essentially of particles having cation-exchanging sites at least on their available surfaces, the particles being of a diameter of between about 1 to about 75 microns; anda liquid coating which consists essentially of a hydrophilic, water soluble, film forming resin having anion-exchanging sites which attract available cation-exchanging sites of the substrate, wherein the liquid coating is retained by electrostatic bonds on the available surfaces of the substrate particles. The invention further includes a chromatographic column and process using the described packing composition.Type: GrantFiled: October 24, 1988Date of Patent: May 22, 1990Assignee: The Dow Chemical CompanyInventors: Timothy S. Stevens, Martin A. Langhorst, Osro W. Randall, III
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Patent number: 4837161Abstract: An analytical chemistry apparatus and method for introducing a reagent into a flowing stream of liquid carrier in order to quantitatively analyze one or more components of a sample added into the carrier. The reagent is permeated across a short section of membrane having relatively large pores. The use of such a membrane: (a) allows the membrane to be protected from physical damage by covering it with a perforate structure; (b) significantly reduces bandspreading across the membrane reagent addition device; (c) reduces the pressure drop across the membrane reagent addition device; and (d) still allows for the permeation of an effective amount of the reagent into the carrier. The reagent is preferably pressurized to minimize leakage of carrier across the membrane and the reagent can be self-pressurized by essentially completely filling the reagent reservoir of the invention with reagent and then hermetically sealing the reservoir.Type: GrantFiled: August 25, 1986Date of Patent: June 6, 1989Assignee: The Dow Chemical CompanyInventors: Timothy S. Stevens, Nile N. Frawley, Daniel J. Swart, William C. Harris, Deborah E. Diedering, Lawrence W. Nicholson, L. David Rothman
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Patent number: 4834877Abstract: The overall mass transport efficiency of hollow fiber membrane separation cells is increased by introducing segmented flow into the bores of the fibers. The invention is preferably practiced by dispersing a gas segmentation phase into a continuous liquid phase and feeding the dispersion into the bores of the fibers to form alternating flowing segments of gas and liquid.Type: GrantFiled: June 28, 1988Date of Patent: May 30, 1989Assignee: The Dow Chemical CompanyInventors: Thomas L. Peters, Timothy S. Stevens
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Patent number: 4793920Abstract: Porous ceramic plugs are cast in place in chromatographic columns in order to provide supports for chromatographic beds in liquid chromatography devices and restrictors in supercritical fluid chromatographic devices. The supports are cast in place by fusing a silicate containing solution, such as one containing potassium silicate, which has been drawn into the outlet end of the column.Type: GrantFiled: October 20, 1987Date of Patent: December 27, 1988Assignee: Lee Scientific, Inc.Inventors: Hernan Cortes, Curtis D. Pfeiffer, Bruce E. Richter, Timothy S. Stevens
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Patent number: 4751004Abstract: Packing tube membranes or membrane channels for Ion Chromatography with inert or charged ion exchange beads greatly increases overall suppressor efficiency. The length of membrane required is reduced, e.g. from 20 feet to 5 feet and bandspreading is reduced from 870 .mu.l to 200 .mu.l. This significant increase in efficiency is attributed to the mixing action of the packing on the flow stream which results in convective radial transport much more rapid than the diffusion controlled transport observed in unpacked membranes. The technique is also described for developing more efficient liquid chromatographic post-column reactors for adding reagent to the column effluent to increase detection sensitivity.Type: GrantFiled: April 25, 1986Date of Patent: June 14, 1988Assignee: The Dow Chemical CompanyInventors: Timothy S. Stevens, Gary L. Jewett, Robert A. Bredeweg
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Patent number: 4715217Abstract: The invention relates to a membrane assisted analytical chemical method for the determination of the concentration of an organic compound in an aqueous matrix. The membrane partitions the matrix from a receiving fluid. The organic compound permeates the membrane and passes into the receiving fluid which is then analyzed for the permeated compound by, for example, liquid or gas chromatography. The membrane is selected to prevent contamination of the receiving fluid from otherwise interferring components of the matrix. The concentration of the organic compound is above its solubility limit in water which would ordinarily prevent effective use of such a membrane assisted method. However, when the organic compound is emulsified with, for example, a surfactant, then a membrane assisted method is successful.Type: GrantFiled: September 4, 1986Date of Patent: December 29, 1987Assignee: The Dow Chemical CompanyInventors: Brenton S. Coyne, Andrew J. Strandjord, Mark W. Spence, Reid S. Willis, Robert A. Bredeweg, Timothy S. Stevens
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Patent number: 4696904Abstract: The invention is the novel combination of liquid chromatographic separation of water from other components of an injected sample followed by electrochemical detection and quantitation of the separated water.Type: GrantFiled: March 24, 1986Date of Patent: September 29, 1987Assignee: The Dow Chemical CompanyInventors: Timothy S. Stevens, Hamish Small
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Patent number: 4684470Abstract: The overall mass transport efficiency of hollow fiber membrane separation cells is increased by introducing segmented flow into the bores of the fibers. The invention is preferably practiced by dispersing a gas segmentation phase into a continuous liquid phase and feeding the dispersion into the bores of the fibers to form alternating flowing segments of gas and liquid.Type: GrantFiled: August 9, 1985Date of Patent: August 4, 1987Assignee: The Dow Chemical CompanyInventors: Thomas L. Peters, Timothy S. Stevens
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Patent number: 4629705Abstract: A versatile and highly sensitive procedure of indirect photometric chromatography in which a variable capacity pH dependent weakly basic or weakly acidic ion exchange medium is used in the chromatographic column to effect ion separations. Adjusting eluent pH allows increased detection limits without extended analysis time, reduced column efficiency, or the need for a battery of conventional strongly basic/acidic ion exchange columns.Type: GrantFiled: May 31, 1984Date of Patent: December 16, 1986Assignee: The Dow Chemical CompanyInventors: Hernan J. Cortes, Timothy S. Stevens
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Patent number: 4519905Abstract: An improved chromatographic analytical column, the column containing a pellicular type (agglomerated) anion-exchange packing, comprising:Component A, which comprises a pressure packed bed of substrate particles of insoluble synthetic resin, having cation-exchanging sites at least on their available surfaces, the Component A particles being of low porosity relative to Component B microparticles, described below, andComponent B, derived by agglomerating microparticles of insoluble synthetic resin onto the pressure packed bed of Component A particles, the microparticles having a volume average diameter of less than about 1,500 and greater than about 50 Angstroms and having anion-exchanging sites, at least on their outer surfaces, which attract available cation sites of Component A, wherein the microparticles of Component B are attached as a monolayer to the available surfaces of the Component A particles.Type: GrantFiled: July 2, 1984Date of Patent: May 28, 1985Assignee: The Dow Chemical CompanyInventors: Timothy S. Stevens, Martin A. Langhorst