Samsung Electronics Co., Ltd.

Michael A Kaufman

Jack Chaney

Musa Jahanghir

Systems are provided for converting high definition pictures or data to lower definition images using wavelet transforms. In the preferred embodiments, the wavelet transforms are be used in either the transmission/coding or reception/decoding phase for enabling a more efficient conversion of the signal and providing a more robust and accurate output. The wavelet transforms may be applied to conventional systems to enhance performance or entire transmission and reception systems may be designed where the wavelet transforms are applied to the data for coding, decoding and decimation operations.

Methods and arrangements for a converting a high definition image to a lower definition image using wavelet transforms

A method and an apparatus for converting a high definition image to a relatively lower definition image is provided. Image data encoded with a discrete cosine transform (DCT) is decoded using an inverse wavelet transform (IDWT). A fast inverse discrete wavelet transform (FIDWT) is also provided that reduces the number of multiplication operations relative to the IDWT. Image data is also encoded using a discrete wavelet transform (DWT) and then decoded using an (IDWT).

Method and apparatus for converting a high definition image to a relatively lower definition image using wavelet transforms

A method and an apparatus for processing a high definition image using both an inverse discrete cosine transform (IDCT) and an inverse discrete wavelet transform (IDWT) to provide a relatively lower definition image is provided. Image data encoded with a discrete cosine transform (DCT) is decoded using both an IDCT and an IDWT to generate IDCT processed image data and IDWT reduced image data. The IDCT processed image data and the IDWT reduced image data are combined to generate reduced image data that has a relatively lower definition than the image data and a relatively higher definition than the IDWT reduced image data.

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San Jose, CA, United States of America

Michael A Kaufman