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AssigneeDavid Michael Geshwind
InventorDavid Michael Geshwind
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Processes for selecting, manipulating and arranging data points or pixels derived from information bearing signals are useful to reduce the bandwidth of, or improve the perceived quality of, such a signal as transmitted and displayed. The techniques utilize time-varying sampling schemes and take into account the characteristics of the human visual system. For each information frame, a subset (3) of all possible data points (1) is selected (2). A further subset of active data points (5) is selected (4) for which data will actually be sampled. The active points (5) are further divided (6) into points for which a value will be transmitted (x-points) (7) and points which will be sampled but for which no separate value will be transmitted (o-points) (8). A mathematical association between the x-points and o-points is made (9) and new values to be transmitted are calculated for the x-points (10). The parameters of the selection and association processes are varied in a non-trivial manner and the, now modified, cycle repeated (11) for subsequent data frames. In particular, the techniques may be used to process a high-definition television signal prior to its storage, or transmission over a low-bandwidth channel.
A process for deriving a second information bearing signal comprising a second succession of data frames, from a first information bearing signal comprising a first succession of data frames, which process comprises the steps of:
A system component for deriving a second information bearing signal comprising a second succession of data frames, from a first information bearing signal comprising a first succession of data frames, which system component comprises:
A process for deriving a second information bearing signal comprising a second succession of data frames, from a first information bearing signal comprising a first succession of data frames, which process comprises the steps of:
Dependencies are inferred from the claim text.