1
Paul E Jacobs, William R Gardner, Chong U Lee, Klein S Gilhousen, S Katherine Lam, Ming Chang Tsai: Variable rate vocoder. QUALCOMM Incorporated, Russell B Miller, Sean English, May 9, 1995: US05414796 (393 worldwide citation)

An apparatus and method for performing speech signal compression, by variable rate coding of frames of digitized speech samples. The level of speech activity for each frame of digitized speech samples is determined and an output data packet rate is selected from a set of rates based upon the determi ...


2
Robert L Warren, Chong U Lee, Kamran Moallemi: Multi-media copy management system. Solana Technology Development Corporation, Barry R Lipsitz, Ralph F Hoppin, October 5, 1999: US05963909 (323 worldwide citation)

Reproduction of a multi-media data signal which is stored on a source media or distributed via a communication network is controlled by inserting master tag data and control tag data into the data signal. A player/recorder inserts an additional generation of control tag information each time a copy ...


3
Chong U Lee, Kamran Moallemi, Robert L Warren: Method and apparatus for transporting auxiliary data in audio signals. Solana Technology Development Corporation, Barry R Lipsitz, Ralph F Hoppin, October 13, 1998: US05822360 (290 worldwide citation)

Auxiliary data is transported in a conventional audio signal by hiding the data in the form of colored noise. The colored noise has a spectrum that simulates the spectrum of the primary audio signal. The data to be transported is first converted to a spread spectrum signal. The primary audio signal ...


4
Robert L Warren, Chong U Lee, Kamran Moallemi: Multi-media copy management system. Solana Technology Develpment Corporation, Barry R Lipsitz, February 17, 1998: US05719937 (268 worldwide citation)

Reproduction of a data signal which is stored on a source media or distributed via a communication network is controlled by inserting master tag data and control tag data into the data signal. A player/recorder inserts an additional generation of control tag information each time a copy of the media ...


5
Chong U Lee, Kamran Moallemi, Jurg Hinderling: Post-compression hidden data transport. Solana Technology Development Corporation, Barry R Lipsitz, Ralph F Hoppin, November 11, 1997: US05687191 (261 worldwide citation)

Auxiliary data subband samples representing an auxiliary data signal are transported in a subband-coded compressed digital audio signal without decompressing the data. A pre-existing packetized data stream is provided to an input of a encoder. Subband audio samples are extracted from the packet stre ...


6
Chong U Lee: Adaptive block size image compression method and system. Qualcomm Incorporated, April 21, 1992: US05107345 (236 worldwide citation)

An image compression system and method for compressing image data for transmission. Each block and corresponding sub-blocks of pixel data is subjected to a discrete cosine transform (DCT) operation. Varying levels of sub-blocks of resulting corresponding transform coefficients are selected for const ...


7
Chong U Lee: Adaptive block size image compression method and system. Qualcomm Incorporated, Russell B Miller, Sean English, September 19, 1995: US05452104 (181 worldwide citation)

In an adaptive block size image compression method and system for compressing image data, a respective method and system for further compressing the image data for transmission. Each block and corresponding sub-blocks of pixel data is subjected to a discrete cosine transform (DCT) operation. Varying ...


8
Chong U Lee, Kamran Moallemi, Jurg Hinderling: Post-compression hidden data transport for video. Solana Technology Development Corporation, Barry R Lipsitz, Ralph F Hoppin, May 4, 1999: US05901178 (170 worldwide citation)

Auxiliary data is carried substantially imperceptibly with video transform data in combined transform samples according to a visibility threshold. The auxiliary data provides a capability for a copy protect scheme or verification of television viewing activity. The video transform samples are extrac ...


9
Chong U Lee: Adaptive block size image compression method and system. Qualcomm, Russell B Miller, June 4, 1991: US05021891 (153 worldwide citation)

An image compression system and method for compressing image data for transmission. Each block and corresponding sub-blocks of pixel data is subjected to a discrete cosine transform (DCT) operation. Varying levels of sub-blocks of resulting corresponding transform coefficients are selected for const ...


10
Chong U Lee, Kamran Moallemi, Robert L Warren: Method and apparatus for embedding auxiliary data in a primary data signal. Solana Technology Development Corporation, Barry R Lipsitz, Ralph F Hoppin, August 10, 1999: US05937000 (150 worldwide citation)

Auxiliary data is transported in a primary data signal by hiding the data in the form of colored noise. The colored noise has a spectrum that simulates the spectrum of the primary data signal. The data to be transported is first converted to a spread spectrum signal. The primary data signal is analy ...