Patents Assigned to Tandberg Telecom AS
  • Patent number: 8503537
    Abstract: An apparatus and associated method are provided for decoding of block wise coded video pictures. Implementing a de-blocking filter algorithm or the like in a single instruction multiple data (SIMD) environment, especially for processors with 128-bit vector registers. Parallelism between the SIMD and the register size fits the macroblock size disclosed in the H.264 and MPEG-4 standards is exploited by using transpositions and transformations of luminance and chrominance macroblocks in vertical de-blocking filter operations.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: August 6, 2013
    Assignee: Tandberg Telecom AS
    Inventor: Lars P. Endresen
  • Publication number: 20120300845
    Abstract: A video processing system, method and computer program storage device cooperate to provide a resource and performance efficient sub-pixel motion search operation. Using on the fly calculations it is possible to provide approximations of sub-pixel positions on one image with respect to another image in an image sequence. A sub-pixel position used to set a motion vector for an encoding process may then be identified with reduced processing and memory resources relative to conventional techniques. Also, by later performing a full encoding cost analysis on the earlier identified sub-pixel position, and keeping track of differences, an interpolation accuracy may be dynamically improved by applying the differences to subsequent image frames.
    Type: Application
    Filed: May 27, 2011
    Publication date: November 29, 2012
    Applicant: TANDBERG TELECOM AS
    Inventors: Lars Petter ENDRESEN, Steinar Midtskogen, Stian Selnes
  • Publication number: 20120183074
    Abstract: In video encoding it is common to encode the image data to remove redundancies in the information to be transmitted. While the pixel data is usually arranged in pixel blocks, the blocks can be arranged in one or more groups of N×M blocks called tiles. The tiles avoid the need to send header information on a tile-by-tile or block-by-block basis, and simplifies parallel processing of the tiles. Bits from respective tiles may then be reformatted to recreate bits according to a raster-scan direction. This enables the decoder to receive the bits in a regular raster-scan format, but also have the ability to decode the tiles once the bits are reformatted. By partitioning an image into tiles of size N×M, it is possible to further exploit the intra-frame correspondence of images in a vertical direction as well as horizontal direction since the tiles need not destroy as many dependencies between blocks in a tile as if the blocks where organized in slices or slice groups.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 19, 2012
    Applicant: TANDBERG TELECOM AS
    Inventor: Arild FULDSETH
  • Publication number: 20120177102
    Abstract: A video coding/decoding system, method and computer program product employ an integer transform matrix for transforming to/from transform coefficients and residual pixel data in moving pictures by a set of semi-orthonormal basis vectors. The basis vectors are derived from conventional DCT or KTL matrixes, but relaxes to some extent the requirements for orthogonality, norm equality and element size limitation. In this way improved coding efficiency and lower complexity compared to previously used integer transforms are possible.
    Type: Application
    Filed: January 10, 2011
    Publication date: July 12, 2012
    Applicant: TANDBERG TELECOM AS
    Inventors: Gisle BJØNTEGAARD, Arild FULDSETH
  • Patent number: 8126183
    Abstract: An audio source tracking arrangement, integrated in or connected to a video conference system, for determining a position of a source creating a sound, including: at least an audio signal processing module configured to determine the position of the source creating the sound based on a plurality of audio signals originating from the source respectively captured by a plurality of microphones; and one or more microphone housings, respectively encapsulating at least one of the plurality of microphones, the one or more microphone housings including a cavity in which at least one of the plurality of microphones is localized, an aperture on a surface of the microphone housing, and a channel extending from the cavity to the aperture, wherein the channel and the cavity are dimensioned to form an acoustical amplifier with a frequency response having one or more high frequency peaks in a frequency band of the sound.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: February 28, 2012
    Assignee: Tandberg Telecom AS
    Inventors: Gisle Enstad, Trygve Frederik Marton, Johan Ludvig Nielsen
  • Publication number: 20120001999
    Abstract: A videoconferencing terminal and method use a display and camera that are adaptable depending on the mode of operation: videoconference mode, or document camera mode. The camera is pivotally mounted on the display, and is pivotally positionable within different pivot ranges according to the pivot angle with respect to a surface on which the display is positioned. When the camera is rotated beyond a predetermined non-zero angle relative to a vertical plane, the mode of operation automatically switches to a document pick-up mode of operation. In the document pick-up mode, the image of the document is flipped so as to be viewed by users at both endpoints of a videoconference call. Also, the camera is set to maximum zoom and focus adjusted to a predetermined distance so as to make for a clean image capture of the document. Also, the camera provides for keystone correction due to the lens not being co-planer with the document.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 5, 2012
    Applicant: TANDBERG TELECOM AS
    Inventors: Jochen Christof SCHIRDEWAHN, Simen Andresen
  • Publication number: 20110310212
    Abstract: A system and method allowing users of video call endpoints to register their video call addresses in a local, regional and/or global directory, where the directory is configured to validate whether the video call address is a valid accessible address and that the user registering the video call number actually has physical access to the a video call device using the video call address.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 22, 2011
    Applicant: Tandberg Telecom AS
    Inventor: Axel Dahl
  • Publication number: 20110292165
    Abstract: A method including: establishing connections, at a server, to at least two client devices using a call control protocol, the call control protocol negotiating video formats and connection information for sending and receiving media streams; receiving information from a first client at the server, the information comprising meta-data describing different media streams the first client is configured to transmit; transmitting the information received from the first client to the at least one other client; receiving a subscribe message from the at least one other client at the server, subscribing to at least one available media stream from the first client; in response to receiving at least one subscribe message from the at least one other client, transmitting, by the server, a message instructing the first client to start transmitting media streams subscribed to by the at least one other client; receiving, by the server, the media streams subscribed to by the at least one other client from the first client; and
    Type: Application
    Filed: May 23, 2011
    Publication date: December 1, 2011
    Applicant: TANDBERG TELECOM AS
    Inventors: Espen BERGER, Pascal BÜHLER, Jan Asle KROKNES
  • Publication number: 20110228856
    Abstract: A video encoder/decoder device, method, and computer program product combine to enhance entropy encoding by using different calculation approaches for assessing costs of using different encoding modes for a video encoding. Moreover, frames in a sequence, and/or sub-frames within a frame may have lowest cost coding modes selected using different cost calculation approaches. One exemplary cost calculation is SAD and another is SSD. A net effect is better subjective video quality for a given bitrate, with reduced encoder complexity, especially when recognizing the lesser amount of computational resources required to support SAD as opposed to SSD.
    Type: Application
    Filed: February 15, 2011
    Publication date: September 22, 2011
    Applicant: TANDBERG TELECOM AS
    Inventor: Gisle BJOENTEGAARD
  • Publication number: 20110205393
    Abstract: A method, apparatus, and computer-readable storage medium for removing flickering from a video of an object illuminated by a screen that operates on a refresh rate value (fscr) among a first value set including screen compatible refresh rate values, and an ambient lighting that operates on a certain line frequency value (fl) captured by a camera with a certain exposure time value (te) among a second value set including camera compatible exposure time values.
    Type: Application
    Filed: December 22, 2010
    Publication date: August 25, 2011
    Applicant: TANDBERG TELECOM AS
    Inventor: Petter SCHATVET
  • Patent number: 7990879
    Abstract: The present invention relates to instability problems in circuit switched conferencing, and provides a method for establishing a backup “voice only” telephony link in parallel with a H.320 conference link. The two links between the calling parties is handled as one logical call entity. Audio is muted on the backup voice telephony link when status of the H.320 link is okay. If communication problems are detected on the H.320 link, audio is muted over the H.320 link and switched to the backup voice telephony link instead.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: August 2, 2011
    Assignee: Tandberg Telecom AS
    Inventor: Paul Flateby
  • Publication number: 20110179182
    Abstract: A method including: generating a random identification token on a computer, said identification token identifying the computer; modulating the identification token to an audio signal on the computer; causing, with the computer, a speaker to emit the audio signal; receiving, at video conference device, the audio signal with a microphone associated with the video conference device; demodulating the audio signal to the identification token in the video conference device; sending at least the identification token and a unique identifier of the video conference device to the computer; and establishing a communication session through a communication network, that both the computer and video conference device are communicatively connected to, from the computer to the video conference device enabling control of, and data transfer to, the video conference device from the computer.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 21, 2011
    Applicant: Tandberg Telecom AS
    Inventor: Ole André Vadla Ravnäs
  • Publication number: 20110176687
    Abstract: A new acoustic echo suppressor and method for acoustic echo suppression is described herein. Exemplary embodiments of the acoustic echo suppressor use one linear regression model for each subband. The linear regression model for each subband may operate on the squared magnitude of the input samples as well as corresponding cross-products.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 21, 2011
    Applicant: Tandberg Telecom AS
    Inventor: Oystein BIRKENES
  • Publication number: 20110175977
    Abstract: A method, system, and computer-readable storage medium for remotely controlling a video conferencing device registered with a video conferencing management server.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 21, 2011
    Applicant: TANDBERG TELECOM AS
    Inventor: Axel DAHL
  • Publication number: 20110176587
    Abstract: A method is provided that includes transmitting data to a backplane from a first communication module simultaneously on a first pair of operating frequencies, where the first pair of operating frequencies includes first and second operating frequencies. The method further provides that a ?3 dB point of a first electromagnetic emission spectrum peak originating from transmission of the data at the first operating frequency is outside a ?3 dB point of a second electromagnetic emission spectrum peak originating from transmission of the data at the second operating frequency.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 21, 2011
    Applicant: TANDBERG TELECOM AS
    Inventor: Daniel Martin HAYES
  • Publication number: 20110157300
    Abstract: A method including: receiving acoustic signals originating from an acoustic source at a first pair of microphone elements, arranged symmetrically about a detection point; calculating, with a processor device, a cross correlation of signals provided by the first pair of microphone elements, resulting in a first cross correlation signal; receiving the acoustic signals originating from the acoustic source at a second pair of microphone elements, arranged symmetrically about the detection point; calculating, with the processor device, a cross correlation of signals provided by the second pair of microphone elements, resulting in a second cross correlation signal; and calculating, with the processor device, a direction between the detection point and the acoustic source based on a convolution of the first cross correlation signal by the second cross correlation signal.
    Type: Application
    Filed: December 30, 2010
    Publication date: June 30, 2011
    Applicant: Tandberg Telecom AS
    Inventor: Audun SOLVANG
  • Publication number: 20110149777
    Abstract: A method including: receiving, at a video conferencing device, a packet of a video conferencing media stream, the video conferencing device including a processor; determining, by the video conferencing device, whether a length of the packet is sufficiently long to contain media; sending a request to a Look-up Table memory using the media stream ID as an input value while in parallel determining, with the processor, whether the packet is a valid media packet; in response to receiving a destination address in a media processing network from the Look-up Table memory and determining that the packet is a valid media packet, modifying, by the video conferencing device, a header of the packet with the destination address received from the Look-up Table memory; and transmitting, by the video conferencing device, the packet to the modified destination address.
    Type: Application
    Filed: December 21, 2010
    Publication date: June 23, 2011
    Applicant: TANDBERG TELECOM AS
    Inventor: Simon ROBBINS
  • Patent number: D646670
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: October 11, 2011
    Assignee: Tandberg Telecom AS
    Inventor: Jorunn Tyssø
  • Patent number: D649951
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: December 6, 2011
    Assignee: Tandberg Telecom AS
    Inventors: Maren Anne Roed, Stig Myler, Friederike Faller, Torkel Steffen Mellingen
  • Patent number: D651185
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: December 27, 2011
    Assignee: Tandberg Telecom AS
    Inventor: Simen Andresen