公开(公告)号：US09819957B2

公开(公告)日：2017-11-14

申请号：US15587116

申请日：2017-05-04

Applicant: Texas Instruments Incorporated

Inventor： Mihir Narendra Mody ,  Vipul Paladiya ,  Kapil Ahuja

IPC: G06K9/36 ,  H04N19/44 ,  H04N19/70 ,  H04N19/625 ,  H04N19/124 ,  H04N19/423

CPC classification number: H04N19/44 ,  H04N19/124 ,  H04N19/34 ,  H04N19/423 ,  H04N19/625 ,  H04N19/70

Abstract: A progressive JPEG (joint photographic experts group) decoder is disclosed. The progressive JPEG decoder includes a processing unit that receives a plurality of progressive scans and generates a plurality of modified progressive scans (MPSs). A baseline JPEG decoder, coupled to the processing unit, includes a Huffman decoder, an inverse quantization unit and an inverse transform unit. The Huffman decoder receives a current MPS and generates a set of transform coefficients corresponding to the current MPS. The processing unit adds a set of transform coefficients corresponding to a previous MPS to the set of transform coefficients corresponding to the current MPS, and the processing unit generates quantization indices. The inverse quantization unit estimates inverse quantization values based on the quantization indices. The inverse transform unit estimates inverse transform decoded values based on the estimated inverse quantization values and generates a set of pixels corresponding to the current MPS.

公开(公告)号：US09648350B2

公开(公告)日：2017-05-09

申请号：US14335099

申请日：2014-07-18

Applicant: Texas Instruments Incorporated

Inventor： Mihir Narendra Mody ,  Vipul Paladiya ,  Kapil Ahuja

IPC: G06K9/36 ,  H04N19/625 ,  H04N19/44 ,  H04N19/34

CPC classification number: H04N19/44 ,  H04N19/124 ,  H04N19/34 ,  H04N19/423 ,  H04N19/625 ,  H04N19/70

Abstract: A progressive JPEG (joint photographic experts group) decoder is disclosed. The progressive JPEG decoder includes a processing unit that receives a plurality of progressive scans and generates a plurality of modified progressive scans (MPSs). A baseline JPEG decoder, coupled to the processing unit, includes a Huffman decoder, an inverse quantization unit and an inverse transform unit. The Huffman decoder receives a current MPS and generates a set of transform coefficients corresponding to the current MPS. The processing unit adds a set of transform coefficients corresponding to a previous MPS to the set of transform coefficients corresponding to the current MPS, and the processing unit generates quantization indices. The inverse quantization unit estimates inverse quantization values based on the quantization indices. The inverse transform unit estimates inverse transform decoded values based on the estimated inverse quantization values and generates a set of pixels corresponding to the current MPS.

公开(公告)号：US20170238003A1

公开(公告)日：2017-08-17

申请号：US15587116

申请日：2017-05-04

Applicant: Texas Instruments Incorporated

Inventor： Mihir Narendra Mody ,  Vipul Paladiya ,  Kapil Ahuja

IPC: H04N19/44 ,  H04N19/423 ,  H04N19/124 ,  H04N19/70 ,  H04N19/625

CPC classification number: H04N19/44 ,  H04N19/124 ,  H04N19/34 ,  H04N19/423 ,  H04N19/625 ,  H04N19/70

Abstract: A progressive JPEG (joint photographic experts group) decoder is disclosed. The progressive JPEG decoder includes a processing unit that receives a plurality of progressive scans and generates a plurality of modified progressive scans (MPSs). A baseline JPEG decoder, coupled to the processing unit, includes a Huffman decoder, an inverse quantization unit and an inverse transform unit. The Huffman decoder receives a current MPS and generates a set of transform coefficients corresponding to the current MPS. The processing unit adds a set of transform coefficients corresponding to a previous MPS to the set of transform coefficients corresponding to the current MPS, and the processing unit generates quantization indices. The inverse quantization unit estimates inverse quantization values based on the quantization indices. The inverse transform unit estimates inverse transform decoded values based on the estimated inverse quantization values and generates a set of pixels corresponding to the current MPS.

公开(公告)号：US20150023609A1

公开(公告)日：2015-01-22

申请号：US14335099

申请日：2014-07-18

Applicant: Texas Instruments Incorporated

Inventor： Mihir Narendra Mody ,  Vipul Paladiya ,  Kapil Ahuja

IPC: H04N19/13 ,  H04N19/44 ,  H04N19/172 ,  H04N19/625

CPC classification number: H04N19/44 ,  H04N19/124 ,  H04N19/34 ,  H04N19/423 ,  H04N19/625 ,  H04N19/70

Abstract: A progressive JPEG (joint photographic experts group) decoder is disclosed. The progressive JPEG decoder includes a processing unit that receives a plurality of progressive scans and generates a plurality of modified progressive scans (MPSs). A baseline JPEG decoder, coupled to the processing unit, includes a Huffman decoder, an inverse quantization unit and an inverse transform unit. The Huffman decoder receives a current MPS and generates a set of transform coefficients corresponding to the current MPS. The processing unit adds a set of transform coefficients corresponding to a previous MPS to the set of transform coefficients corresponding to the current MPS, and the processing unit generates quantization indices. The inverse quantization unit estimates inverse quantization values based on the quantization indices. The inverse transform unit estimates inverse transform decoded values based on the estimated inverse quantization values and generates a set of pixels corresponding to the current MPS.

Abstract translation: 公开了一种渐进的JPEG（联合摄影专家组）解码器。 逐行JPEG解码器包括接收多个渐进扫描并产生多个修改的逐行扫描（MPS）的处理单元。 耦合到处理单元的基线JPEG解码器包括霍夫曼解码器，逆量化单元和逆变换单元。 霍夫曼解码器接收当前的MPS并产生与当前MPS对应的一组变换系数。 处理单元将与先前MPS对应的一组变换系数与对应于当前MPS的变换系数组相加，并且处理单元生成量化索引。 逆量化单元基于量化索引来估计反量化值。 逆变换单元基于估计的反量化值估计逆变换解码值，并生成与当前MPS对应的一组像素。