Qualcomm Incorporated

Amnon Silberger

Vijayalakshmi Rajasundaram Raveendran

Gordon Kent Walker

Thadi Manjunath Nagaraj

Bruce Collins

Brian William Orr

An Mei Chen

Yu-Cheun Jou

Brian K Butler

Mark Maggenti

Leonard N Schiff

Binita Gupta

Fang Shi

Douglas Marion Crockett

Christopher John Bennett

Richard Doil Lane

Sapna P Mehta

Dhinakar Radhakrishnan

Sumeet Singh Sethi

Sajith Balraj

Fang Liu

Scott T Swazey

David Samuel Brackman

Julien Nicolas

Robert Stacey

Eitan Pilipski

Serafim Loukas, Jr

Suryanarayana China Chittuluri

Serafim S Loukas

Rajkumar Pitchaimani

Ramkumar Sampathkumar

Utkarsh A Mehta

Sapna Mehta

A method and apparatus to improve error resiliency in processing a multimedia bitstream is described. A directory of header information is generated for a multimedia bitstream. The directory information comprises packet header information associated with the multimedia bitstream. The directory information may be transmitted to a receiver along with the multimedia bitstream. A receiver of the multimedia bitstream and the directory can utilize the header information to identify and locate packets within and subsequent to erroneous data in the received bitstream. By identifying and locating packets that may otherwise be discarded, the receiver may be able to improve error recovery and decoding of the multimedia data.

Error resilience using out of band directory information

Methods and apparatus for packetization of content for transmission over a network. A method is provided that includes generating one or more content packets from the multimedia content, wherein the content packets are associated with a time reference, and adding a sync header to the one or more content packets to form one or more application layer packets, respectively, wherein the sync header comprises a time indicator that indicates time relative to the time reference. An apparatus includes encoding logic configured to generate one or more content packets from the multimedia content, wherein the content packets are associated with a time reference, and packetization logic configured to add a sync header to the one or more content packets to form one or more application layer packets, respectively, wherein the sync header comprises a time indicator that indicates time relative to the time reference.

Methods and apparatus for packetization of content for transmission over a network

Systems, apparatus and methods provide an automatic capability for generating interactivity event applications for execution on receiver devices within a broadcast network based upon interactivity event application data, information and sequence logic. Interactivity event content providers may provide to a broadcast network interactivity event application data, event metadata information and sequence logic a broadcast network. Interactivity application data for an interactive sequence may be delivered out-of-band, such that the application data is not embedded in an interactivity event. Interactivity sequence application data may be sent out-of-band from the associated interactivity event signaling message. Application data may be sent on a different transport channels in advance of the interactivity event. The system may determine when data should be sent out-of-band and when it should be sent in-band.

Signaling mechanisms and systems for enabling, transmitting and maintaining interactivity features on mobile devices in a mobile broadcast communication system

Methods and apparatus to provide a virtual network interface. In an aspect, a method includes receiving a request to access content on a Non-IP network, wherein the request comprises an IP address and a quality of service (QoS) profile associated with the content, mapping the IP address and the QoS profile into a Non-IP network content identifier, and obtaining the content from the Non-IP network based on the Non-IP network content identifier. In an aspect, an apparatus includes an application interface configured to receive a request to access content on a Non-IP network, wherein the request comprises an IP address and a QoS profile associated with the content, mapping logic configured to map the IP address and the QoS profile into a Non-IP network content identifier, and processing logic configured to obtain the content from the Non-IP network based on the Non-IP network content identifier.

Methods and apparatus to provide a virtual network interface

Techniques for video encoding and decoding channel switch frames (CSF) to enable acquisition and re/synchronization of the video stream while preserving compression efficiency is provided. Systems and methods to process multimedia data enabling channel switching are presented. The systems generate a CSF with one or more network adaptation layer (NAL) units as a random access point (RAP) frame. Back-to-back frames are transmitted which include the CSF and a non-RAP frame, each having the same frame ID number.

Systems and methods for channel switching

Video images in, e.g., a multimedia stream are scanned prior to compression for transmission to recognize symbols, such as graphics symbols and alpha-numeric characters. The types, positions, sizes, etc. of the symbols are recorded to render symbol information, and then the images are compressed with or without compressing the symbols, which may be removed from the images prior to compression if desired. The compressed video and symbol information are sent to a receiver, which decompresses the video, optionally transforms the symbols, and then inserts the symbols where indicated by the symbol information.

System and method for processing symbols embedded in digital video

A system and method for the detection of zero-rate communication frames on forward and reverse communication links is described herein. In a first embodiment, the rate determination process begins upon receiving pilot and traffic channel signals. The system then compares the received traffic channel energy with the pilot signal to obtain a metric. The metric is then compared with a predetermined threshold to detect the presence of a zero-rate traffic channel frame. In a second embodiment, the process begins with the receipt of a reverse communication link frame having first and second portions. The system then detects the energy contained in the first and second portions. The system compares the detected energy in the first portion with the detected energy in the second portion to obtain a metric. The system then compares the metric with a predetermined threshold to detect the presence of the zero-rate frame. The selection of the predetermined threshold in both embodiments is based on the probability of detection of a transmitted zero-rate frame and the probability of erroneously detecting a zero-rate frame.

Energy based communication rate detection system and method

A method and apparatus for accurately determining the operating characteristics or impact of nonlinear effects on devices or communication systems transferring orthogonally coded spread-spectrum communication signals. A Walsh Power Ratio, is used to more accurately determine system response. This information can be used by power control loops in controlling or adjusting the operation of nonlinear elements or stages such as high power amplifiers in orthogonal CDMA communication systems to provide improved system response. The information can also be employed in assigning channels to systems users, and to proceed with physical changes to system hardware. The measurements used to formulate the WPR can be made to individual components or to entire systems by injecting communication signals in multiple channels containing data, and leaving at least one empty channel. The received power per channel on the output side of the system or device is then measured. A ratio of power density for the empty to the active channels is then formed. The determination of WPR for a system or components can be realized during periods of operation through periodic transfer of test signals either at allocated times or by interleaving among existing traffic signals in the system.

Method and apparatus for measuring nonlinear effects in a communication

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La Jolla, CA, United States of America

Amnon Silberger