Apparatus and method for encoding digital image data in a lossless manner
AssigneeQUALCOMM Incorporated
InventorsVijayalakshmi R. Raveendran, Kadayam S. Thyagarajan, John Ratzel, Dianne Ratzel, Steven A. Morley, Ann Chris Irvine
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Abstract
A method of losslessly compressing and encoding signals representing image information is claimed. A lossy compressed data file and a residual compressed data file are generated. 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.
Claims8
A method for losslessly compressing and encoding signals representing an image, the method comprising:
- compressing the signals representing the image thereby creating a compressed version of the image;
- quantizing the compressed version of the image thereby creating a lossy version of the image;
- serializing the quantized compressed version of the image thereby creating a serialized quantized compressed version of the image;
- decompressing the compressed version of the image;
- determining the differences between the image and the decompressed version of the image thereby creating a residual version of the image;
- and
- outputting the lossy version of the image and the residual version of the image, wherein the combination of the lossy version of the image and the residual version of the image is substantially the same as the original image.
An apparatus for losslessly compressing and encoding signals representing an image, the method comprising:
- means for compressing the signals representing the image thereby creating a compressed version of the image;
- means for quantizing the compressed version of the image thereby creating a lossy version of the image;
- means for serializing the quantized compressed version of the image thereby creating a serialized quantized compressed version of the image;
- means for decompressing the compressed version of the image;
- means for determining the differences between the image and the decompressed version of the image thereby creating a residual version of the image;
- and
- means for outputting the lossy version of the image and the residual version of the image, wherein the combination of the lossy version of the image and the residual version of the image is substantially the same as the original image.
An apparatus for losslessly compressing and encoding signals representing an image, the method comprising:
- a compressor element configured to perform discrete cosine transforms (DCTs) and discrete quadtree transforms (DQTs) to the signals representing the image thereby creating a compressed version of the image;
- a quantizer element coupled to the compressor element configured to quantize the compressed version of the image thereby creating a lossy version of the image;
- a serializer element coupled to the quantizer element configured to serialize the quantized compressed version of the image thereby creating a serialized quantized compressed version of the image;
- a decompressor element configured to perform inverse DCTs (IDCTs) and inverse DQTs (IDQTs) the compressed version of the image;
- a determiner element configured to determine the differences between the image and the decompressed version of the image thereby creating a residual version of the image;
- and
- a combiner element configured to combine the lossy version of the image and the residual version of the image, wherein the combination of the lossy version of the image and the residual version of the image is substantially the same as the original image.
Dependencies are inferred from the claim text.