Predictive delayed encoders
阅读：25发布：2022-11-30
专利汇可以提供Predictive delayed encoders专利检索，专利查询，专利分析的服务。并且In a feedback type encoder, predictive delay apparatus allows for the calculation of estimated encoding error one sampling period in advance of the sample being encoded. Each of a plurality of combinatorial means assembles a predicted error signal under conditions of hypothetical prospective output signals. In the embodiment shown, a one bit encoder is afforded exponential adaptation and double integration facilities in its feedback circuitry. The net result is a superior response to rapid directional changes in input analog signals with a substantial improvement in operational stability.，下面是Predictive delayed encoders专利的具体信息内容。
1. A predictive encoder for adaptively encoding differences between samples of an analog signal and predicted versions thereof comprising: means responsive to prior output digits from said encoder and to at least one of said samples for producing at least two estimates of the encoding error to be encountered under the conditions of hypothetical values of output digits at least one sampling period subsequent to the sampling period of a sample being encoded; means, responsive to said estimate producing means, for determining the smallest one of the estimates of encoding error; and means for quantizing said smallest one of the estimates of encoding error as a digital output signal.
2. An encoder as described in claim 1 wherein said means for producing includes means responsive to prior output digits from said means for quantizing for assembling at least one replica of the input analog signal.
3. An encoder as described in claim 2 wherein said means for assembling includes at least one integrating means for integrating prior output signals into an analog replica signal, and an adaptive mechanism responsive to prior output signals for producing signals which are representative of the most recently encoded output digit.
4. An encoder as described in claim 2 wherein said means for producing estimates comprises a plurality of combinatorial means, each of said combinatorial means assembling an estimated error signal on the basis of input sample values, at least one replica of the input analog signals, and signals representing hypothetical subsequent output signals.
5. An encoder as described in claim 1 wherein said means for determining includes a plurality of means for taking the weighted averages of associated ones of said estimates of encoding error, and means for combining said weighted averages.
6. An encoder as described in claim 1 and further including delay means for simultaneously affording to said means for producing estimates more than one consecutive analog input sample.
7. A predictive encoder for adaptively emcoding the difference between a sample of an analog signal and a predicted version thereof as a single binary output bit comprising: delay means for subjecting input samples to a time delay of at least one sampling interval, the sample at the output of said delay means being designated a first sample at the input of said delay means being designated a second sample; means responsive to priorly encoded digital signals for producing appRoximations of said first and second samples; means for combining said first and second samples with their respective approximations and with signals representing variations in said respective approximations resulting from the producing of subsequent output digits; and logical means for encoding the first sample as one of the combinations produced by said means for combining.
8. An improved method for generating an encoded representation of the difference between a sample of an analog signal and a predicted version thereof comprising the steps of: performing at least one integration upon priorly generated output signals, thereby producing an approximation of the next analog sample; generating a predicted error for the encoding of the next analog sample under the conditions of prospective code options for the next analog sample; generating predicted error signals for the encoding of the sample subsequent to said next sample under the conditions of prospective output code options for the next sample and the sample subsequent to the next sample; taking weighted averages of all of said predicted error signals; combining said weighted averages; and encoding the result of said combined weighted averages.
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