Abstract: A simple and efficient scheme is used to predict the number of bits needed to block of discrete cosine transform (DCT) coefficients with variable length coding (VLC). The scheme defines an easily computable parameter that has a strong correlation with the number of bits needed to encode the DCT data. Then a second order polynomial is developed to approximate the correlation and is used to predict the number of VLC bits that will be produced if a corresponding quantization matrix is used. The approach can be used to streamline the encoding/transcoding process for DV, and the result on that is presented. A further feature is the ability to present multiple results for multiple quantization matrixes.

Abstract: A vacuum cleaner includes a housing having a handle pivotally mounted to a nozzle assembly. An agitator is received in an agitator cavity formed in the nozzle assembly. A suction fan and suction fan drive motor are carried on the housing. An edge cleaning brush is pivotally mounted to the nozzle assembly along a lateral edge of the nozzle assembly adjacent the agitator cavity. The brush includes a body having a series of apertures for receiving cleaning bristles and a pair of opposed mounting lugs. The edge cleaning brush is received in a recess with the mounting lugs held in a pair of opposed mounting openings in the nozzle assembly.