1
Lee Fang Wei: Serial-concatenated turbo codes. Lucent Technologies, Ronald D Slusky, Thomas Stafford, October 29, 2002: US06473878 (189 worldwide citation)

Advantageous error rate performance, high bandwidth efficiency, low delay and reduced error floor are achieved at an acceptable level of decoding complexity via the use of serial concatenated turbo codes. These are codes for which at least some of the output bits, including at least one redundant bi ...


2
Vinod Anupam, Narain H Gehani, Viswanath Kadambari: Apparatus and method for sharing information in simultaneously viewed documents on a communication system. Lucent Technologies, Thomas Stafford, June 25, 2002: US06411989 (162 worldwide citation)

Computer users may utilize different web browsers to access a server system on the World Wide Web (WWW) to create or join a collaborative session. One or more controllers connect the users or collaborators in a session in the server system. This is realized by establishing a so-called “shared Web-to ...


3
Hsueh Ming Hang: Adaptive buffer/quantizer control for transform video coders. AT&T Bell Laboratories, Thomas Stafford, August 6, 1991: US05038209 (158 worldwide citation)

A buffer/quantizer controller in a video coder utilizes the average quantization step size employed for the previous frame, the average number of bits produced per pel by the video coder for the image contained in the previous frame and current frame buffer fullness level to obtain an indication of ...


4
Mark W Altom, Richard L Pastore, Diane L Quarles, Dirk Ruiz: Graphical user interface for multimedia call set-up and call handling in a virtual conference on a desktop computer conferencing system. Lucent Technologies, Thomas Stafford, May 6, 1997: US05627978 (137 worldwide citation)

A graphical user interface, i.e., multimedia communications application program, for setting up and handling a multimedia call is disclosed that employs realistic metaphors of real life face-to-meetings in setting up and handling a multimedia call to establish a virtual meeting which is automaticall ...


5
Robert D Howson: Error monitoring in digital transmission systems. Bell Telephone Laboratories Incorporated, Thomas Stafford, August 2, 1983: US04397020 (133 worldwide citation)

Errors in digital transmission are monitored by employing a cyclical-redundancy-check (CRC). A CRC code word having a predetermined number of bits is generated (via 310) from a block of bits (ESF) of a presently transmitted time division muliplexed (XTDM) signal. The code word bits are then inserted ...


6
Barin G Haskell, Amy R Reibman: Timing recovery for variable bit-rate video on asynchronous transfer mode (ATM) networks. AT&T Bell Laboratories, Thomas Stafford, February 15, 1994: US05287182 (125 worldwide citation)

Complications of timing recovery in an ATM receiver are overcome by employing a first phase lock loop including a phase comparator, filter, voltage controlled oscillator (VCO) and output counter to lock to systems clock reference (SCR) values which are asynchronously received from a remote ATM trans ...


7
David W Petr: Adaptive differential PCM coding. Bell Telephone Laboratories Incorporated, John K Mullarney, Thomas Stafford, March 13, 1984: US04437087 (120 worldwide citation)

An ADPCM coder (100) converts a linear PCM input signal representative of PCM encoded speech or voiceband data into a quantized n-bit differential PCM output signal. Samples of the PCM input signal are delivered to a difference circuit (11) along with a signal estimate of the same derived from an ad ...


8
Dominick Scordo: Programmable audio mixer. AT&T Bell Laboratories, Thomas Stafford, December 10, 1985: US04558180 (118 worldwide citation)

Audio mixes for a plurality of conference locations are controllably obtained by using a matrix multiplication arrangement. The audio mixes for the individual conference locations are obtained by multiplying a dynamically determined gain matrix by an audio input matrix. Coefficient values in the gai ...


9
Robert D Howson: Frame resynchronization circuit for digital receiver. Bell Telephone Laboratories Incorporated, Thomas Stafford, February 16, 1982: US04316284 (111 worldwide citation)

Framing of a digital receiver to synchronize with a true framing pattern is realized by employing an autonomous clock to generate framing pattern bits and other timing signal, and by employing a cyclical-redundancy-check (CRC) to eliminate the possibility of framing on false framing patterns. To thi ...


10
James D Tomcik: Adaptive bit allocator. AT&T Bell Laboratories, Thomas Stafford, August 13, 1985: US04535472 (101 worldwide citation)

Improved efficiency in allocating bits to individual ones of a plurality of sub-band signals (or amplitude coefficients) is realized by employing a so-called template matching technique. A plurality of the most likely to occur bit allocation patterns and a corresponding plurality of templates includ ...