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US 2003/0142743 A1Published application
Inverse discrete cosine transform apparatus
AssigneeLG Electronics Inc.
InventorJin Seok Im
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Abstract
An inverse discrete cosine transform (IDCT) apparatus is disclosed. The inverse discrete cosine transform (IDCT) apparatus can satisfy the bit accuracy of the standard recommendation and enable implementation of the ASIC by a smaller logic circuit, and simplify an interface between another sections of a video decoder. According to the present invention the image recovering performance of the video decoder installed to a digital TV receiver can be enhanced.
Claims13
An inverse discrete cosine transform (IDCT) apparatus used to decode received data, comprising:
- a column 1-dimensional IDCT for performing 1-dimensional inverse discrete cosine transformation (IDCT) for a discrete cosine transform coefficient inputted in the unit of two clocks in a column direction inputted and outputting the result in a unit of two clocks;
- a transpose matrix section for transposing the transformed result of the column 1-dimensional IDCT section;
- and
- a row 1-dimensional IDCT section for performing 1-dimensional inverse discrete cosine transformation (IDCT) for the output of the transpose matrix section in a row direction.
1 more element
Dependencies are inferred from the claim text.