Page 234 - DSP Integrated Circuits

References 219

10 bits, respectively. Computations in the DCT processor will be performed by
using one-dimensional vector-multipliers. This means that each output value
(rows) will be computed without round-off errors and then quantized. Hence, the
only round-off errors that occur are inputs to the last set of one-dimensional DCTs
(columns). The round-off errors are therefore smaller than those for a conventional
DCT implementation. Hence, we select a data word length of 12 bits and a coeffi-
cient word length of 11 bits.

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