| 摘要 |
An apparatus for and a method of transcoding data in a first format, for example, MPEG (moving picture experts group)-2 data into data in a second format, for example, H.264 data. The apparatus may include a scaling dequantization unit, a coefficient transform unit, and/or a scaling quantization unit. The scaling dequantization unit may dequantize the data in the first format (e.g., MPEG-2 data) to generate a DCT (discrete cosine transform) coefficient. The coefficient transform unit may approximate a 4x4 second data format (e.g., H.264) integer transform matrix to a 4x4 DCT matrix and transforms the DCT coefficient into an integer transform coefficient using the approximated 4x4 DCT matrix. The scaling quantization unit may quantize the integer transform coefficient to generate the data in the second format (e.g., H.264 data).
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