Patents by Inventor Ann C. Irvine
Ann C. Irvine 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: 8194987Abstract: An apparatus and method for limiting bit rate of compressed data is disclosed. The apparatus and method allows the generation of parameters for encoding digital image data based on the data bit rate resulting from the use of different parameters. In one embodiment, a statistical analysis is performed to determine the different parameters. The use of parameters results in a bit rate that would prevent a decoder to stall during decompression while allowing the encoder compress without affecting the quality. Therefore, a more efficient encoding and decoding can be achieved.Type: GrantFiled: August 22, 2007Date of Patent: June 5, 2012Assignee: QUALCOMM IncorporatedInventors: Senthil Govindaswamy, Brian Fudge, Ann C. Irvine, Kadayam Thyagarajan
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Patent number: 7856149Abstract: An apparatus and method for limiting bit rate of compressed data is disclosed. The apparatus and method allows the generation of parameters for encoding digital image data based on the data bit rate resulting from the use of different parameters. In one embodiment, a statistical analysis is performed to determine the different parameters. The use of parameters results in a bit rate that would prevent a decoder to stall during decompression while allowing the encoder compress without affecting the quality. Therefore, a more efficient encoding and decoding can be achieved.Type: GrantFiled: July 29, 2003Date of Patent: December 21, 2010Assignee: QUALCOMM IncorporatedInventors: Senthil Govindaswamy, Brian Fudge, Ann C. Irvine, Kadayam Thyagarajan
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Patent number: 7630563Abstract: A method of losslessly decoding signals representing an image is claimed. A lossy compressed data file and a residual compressed data file are received. The lossy compressed data file is separated into DC coefficients and AC coefficients, and decoded, separately, to the determine DC values and the AC values. The DC values and the AC values are inverse quantized to produce lossy, decompressed data. The residual compressed data file is decoded to produce a residual decompressed data. The lossy decompressed frequency data is combined with the residual decompressed data to produce a lossless data file, wherein the lossless data file is substantially the same as the original image.Type: GrantFiled: July 18, 2002Date of Patent: December 8, 2009Assignee: QUALCOMM IncorporatedInventors: Ann C. Irvine, Kadayam Thyagarajan
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Patent number: 7596277Abstract: An apparatus and method for the detection of errors in compressed digital image is disclosed. In one embodiment, a signature is generated using a multiple input shift register and added to the compressed information. The signature is verified at the decoder to detect an error in the compressed information. Other information such as the frame number and/or color component type of the compressed image can also be verified to detect errors in the compressed information. In other embodiments, the decoder detects errors if there are bits remaining after decompression and/or if there are invalid codes at decompression. Once an error is detected, the compressed information can be discarded or re-sent and processed. Therefore, the detection of errors can significantly enhance at least the reliance of systems such as digital cinema that require compression of large amounts of data.Type: GrantFiled: April 7, 2003Date of Patent: September 29, 2009Inventors: Senthil Govindaswamy, Ann C. Irvine, John Ratzel
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Patent number: 7564382Abstract: Apparatus and method for generating multiple descriptions of compressed data is disclosed. In the apparatus and method, transform coefficients are generated from input data and quantized. An energy distribution of the quantized transform coefficients is generated. Based on the energy distribution, the transform coefficients are grouped into layers. By entropy coding different number of layers, multiple descriptions of compressed data are generated.Type: GrantFiled: November 17, 2003Date of Patent: July 21, 2009Assignee: QUALCOMM IncorporatedInventors: Ann C. Irvine, Vijayalakshmi R. Raveendran
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Patent number: 7561073Abstract: An apparatus and method for generating multiple descriptions of compressed data are comprised. Generally, a quantized bit stream is generated using a reference quantization step. The quantization bet stream is then re-quantized using a first quantization step to generate a first description of compressed data, wherein the first quantization step is determined based on a first required scaling of the reference quantization step. The quantized bit stream may also be re-quantized using a second quantization step to generate a second description of compressed data, wherein the second quantization step is determined on a second required scaling of the reference quantization step.Type: GrantFiled: April 26, 2006Date of Patent: July 14, 2009Assignee: QUALCOMM IncorporatedInventors: Ann C. Irvine, Vijayalakshmi R. Raveendran
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Patent number: 7203319Abstract: An apparatus for installing a decryption key is initially arranged so that a decryption algorithm received by a control processor is passed via a first interface path to a decryption processor. The algorithm is installed in the decryption processor together with a program decryption key. The apparatus is subsequently arranged so that encrypted working decryption keys received by the control processor are passed on to the decryption processor over the first interface path. The decryption processor decrypts the encrypted keys using the program decryption key. Decryption keys are thus obtained and are transferred via a second interface path to decryptors for use in decrypting encrypted program signals input to the decryptors.Type: GrantFiled: July 9, 2001Date of Patent: April 10, 2007Assignee: Qualcomm, Inc.Inventors: Liat Ben-Zur, Curtis D. Mursfeldt, Christopher Wingert, Paul Pomes, Jesse Hose, Ann C. Irvine, Senthil Govindaswamy
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Patent number: 7061404Abstract: An apparatus and method for generating multiple descriptions of compressed data are comprised. Generally, a quantized bit stream is generated using a reference quantization step. The quantized bit stream is then re-quantized using a first quantization step to generate a first description of compressed data, wherein the first quantization step is determined based on a first required scaling of the reference quantization step. The quantized bit stream may also be re-quantized using a second quantization step to generate a second description of compressed data, wherein the second quantization step is determined based on a second required scaling of the reference quantization step.Type: GrantFiled: November 17, 2003Date of Patent: June 13, 2006Assignee: Qualcomm IncorporatedInventors: Ann C. Irvine, Vijayalakshmi R. Raveendran
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Publication number: 20040156550Abstract: An apparatus and method for limiting bit rate of compressed data is disclosed. The apparatus and method allows the generation of parameters for encoding digital image data based on the data bit rate resulting from the use of different parameters. In one embodiment, a statistical analysis is performed to determine the different parameters. The use of parameters results in a bit rate that would prevent a decoder to stall during decompression while allowing the encoder compress without affecting the quality. Therefore, a more efficient encoding and decoding can be achieved.Type: ApplicationFiled: July 29, 2003Publication date: August 12, 2004Inventors: Senthil Govindaswamy, Brian Fudge, Ann C. Irvine, Kadayam Thyagarajan
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Publication number: 20040141091Abstract: An apparatus and method for generating multiple descriptions of compressed data are comprised. Generally, a quantized bit stream is generated using a reference quantization step. The quantized bit stream is then re-quantized using a first quantization step to generate a first description of compressed data, wherein the first quantization step is determined based on a first required scaling of the reference quantization step. The quantized bit stream may also be re-quantized using a second quantization step to generate a second description of compressed data, wherein the second quantization step is determined based on a second required scaling of the reference quantization step.Type: ApplicationFiled: November 17, 2003Publication date: July 22, 2004Inventors: Ann C. Irvine, Vijayalakshmi R. Raveendran
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Publication number: 20040141656Abstract: Apparatus and method for generating multiple descriptions of compressed data is disclosed. In the apparatus and method, transform coefficients are generated from input data and quantized. An energy distribution of the quantized transform coefficients is generated. Based on the energy distribution, the transform coefficients are grouped into layers. By entropy coding different number of layers, multiple descriptions of compressed data are generated.Type: ApplicationFiled: November 17, 2003Publication date: July 22, 2004Inventors: Ann C. Irvine, Vijayalakshmi R. Raveendran
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Publication number: 20030190078Abstract: An apparatus and method for the detection of errors in compressed digital image is disclosed. In one embodiment, a signature is generated using a multiple input shift register and added to the compressed information. The signature is verified at the decoder to detect an error in the compressed information. Other information such as the frame number and/or color component type of the compressed image can also be verified to detect errors in the compressed information. In other embodiments, the decoder detects errors if there are bits remaining after decompression and/or if there are invalid codes at decompression. Once an error is detected, the compressed information can be discarded or re-sent and processed. Therefore, the detection of errors can significantly enhance at least the reliance of systems such as digital cinema that require compression of large amounts of data.Type: ApplicationFiled: April 7, 2003Publication date: October 9, 2003Inventors: Senthil Govindaswamy, Ann C. Irvine, John Ratzel
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Publication number: 20030039396Abstract: A method of losslessly decoding signals representing an image is claimed. A lossy compressed data file and a residual compressed data file are received. The lossy compressed data file is separated into DC coefficients and AC coefficients, and decoded, separately, to the determine DC values and the AC values. The DC values and the AC values are inverse quantized to produce lossy, decompressed data. The residual compressed data file is decoded to produce a residual decompressed data. The lossy decompressed frequency data is combined with the residual decompressed data to produce a lossless data file, wherein the lossless data file is substantially the same as the original image.Type: ApplicationFiled: July 18, 2002Publication date: February 27, 2003Inventors: Ann C. Irvine, Kadayam Thyagarajan
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Publication number: 20030012431Abstract: A method of losslessly compressing and encoding signals representing image information is claimed. A lossy compressed data file is generated in a first color component space and a residual compressed data file is generated in a second color component space. When the lossy compressed data file and the residual compressed data file are combined, a lossless data file that is substantially identical to the original data file is created.Type: ApplicationFiled: July 11, 2002Publication date: January 16, 2003Inventors: Ann C. Irvine, Kadayam Thyagarajan
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Publication number: 20030007643Abstract: An apparatus for installing a decryption key is initially arranged so that a decryption algorithm received by a control processor is passed via a first interface path to a decryption processor. The algorithm is installed in the decryption processor together with a program decryption key. The apparatus is subsequently arranged so that encrypted working decryption keys received by the control processor are passed on to the decryption processor over the first interface path. The decryption processor decrypts the encrypted keys using the program decryption key. Decryption keys are thus obtained and are transferred via a second interface path to decryptors for use in decrypting encrypted program signals input to the decryptors.Type: ApplicationFiled: July 9, 2001Publication date: January 9, 2003Inventors: Liat Ben-Zur, Curtis D. Mursfeldt, Christopher Wingert, Paul Pomes, Jesse Hose, Ann C. Irvine, Senthil Govindaswamy