Abstract: A sound reproduction system for converting stereo signals on two input channels, which may have been directionally encoded from a four or five channel original using a phase/amplitude film matrix encoder, such signals including at least one component which is directionally encoded through a phase and amplitude encoding device and at least one component that is not directionally encoded but is different in the two input channels, into signals for multiple output channels, for example center, front left, front right, side left, side right, rear left, and rear right, including decoding apparatus for enhancing the directionally encoded component of the input signals in the desired direction and reducing the strength of such signals in channels not associated with the encoded direction, while preserving both the maximum separation between the respective left and right channels and the total energy of the non-directionally encoded component of the input channels in each output channel, such that the instruments rec

Abstract: A sound reproduction system for converting stereo signals on two input channels, which may have been directionally encoded from a four or five channel original using a phase/amplitude film matrix encoder, such signals including at least one component which is directionally encoded through a phase and amplitude encoding device and at least one component that is not directionally encoded but is different in the two input channels, into signals for multiple output channels, for example center, front left, front right, side left, side right, rear left, and rear right, including decoding apparatus for enhancing the directionally encoded component of the input signals in the desired direction and reducing the strength of such signals in channels not associated with the encoded direction, while preserving both the maximum separation between the respective left and right channels and the total energy of the non-directionally encoded component of the input channels in each output channel, such that the instruments rec

Abstract: A portable electronic dictionary in a hand-held housing which mounts a plurality of alpha-numeric displays and a keyboard. A plug-in module contains a microcomputer and a ROM which stores a plurality of pairs of sequences of alpha-numeric characters and is searched by a central processing unit in the microcomputer under instructions stored as firmware in another ROM forming part of the microcomputer. One sequence of each stored pair is compared with a sequence which is entered into the keyboard and stored in a RAM also forming part of the microcomputer until a match is found. After one or more sequences have been entered into the keyboard and locations of matching pairs are stored in the microcomputer RAM, the pairs of stored sequences can be rolled across the display. Either sequence of each pair can be compared with a sequence entered into the keyboard.