Resampling detection apparatus, resampling detection method, resampling apparatus, and resampling method
AssigneeMatsushita Electronic Industrial Co., Ltd.
InventorsJunya Suzuki, Hiroshi Saito
Life of this patent
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Abstract
A resampling detection apparatus for receiving a plurality of input signals composing a digital signal, and detecting whether the digital signal is a resampled signal, includes an estimation section that estimates a signal before resampling for the digital signal from one or more input signals, and a detecting section detects whether the digital signal is a resampled signal, using the estimated signal and one or more input signals.
Claims12
A resampling detection apparatus for receiving a plurality of input signals composing a digital signal, and detecting whether the digital signal is a resampled signal, the resampling detection apparatus comprising:
- an estimation section operable to estimate a signal before resampling for the digital signal from one or more input signals;
- and
- a detecting section operable to detect whether the digital signal is a resampled signal, using the estimated signal and one or more input signals.
A resampling apparatus for receiving a plurality of input signals for composing a digital signal through an input terminal, resampling and outputting the received signals through an output terminal, the resampling apparatus comprising:
- a signal restoring section operable to generate a signal before resampling for the digital signal from one or more input signals;
- a signal decimating section operable to decimate the one or more input signals,
- a resampling detecting section operable to detect whether the digital signal is a resampled signal from one or more input signals, and output a detection signal when the digital signal is detected to be a resampled signal, or output an undetection signal when the digital signal is not detected to be a resampled signal;
- and
- a switch operable to receive an output from the resampling detecting section, and connect an output from the signal restoring section to the output terminal when the output from the resampling detecting section is the detection signal or connect an output from the signal decimating section to the output terminal when the output from the resampling detecting section is the undetection signal,
- wherein the resampling detecting section includes an estimation section operable to estimate a signal before resampling for the digital signal from one or more input signals, and a detecting section operable to detect whether the digital signal is a resampled signal using the estimated signal and one or more input signals.
A resampling detecting method for receiving a plurality of input signals composing a digital signal, and detecting whether the digital signal is a resampled signal, the resampling detecting method comprising:
- estimating a signal before resampling for the digital signal from one or more input signals, and
- detecting whether the digital signal is a resampled signal using the estimated signal and one or more input signals.
A resampling method for receiving a plurality of input signals composing a digital signal and resampling the received signal to output the resampled signal, the resampling method comprising:
- restoring a signal before resampling for the digital signal from one or more input signals;
- decimating the one or more input signals;
- estimating a signal before resampling for the digital signal from one or more input signals;
- detecting whether the digital signal is a resampled signal while using the estimated signal and one or more input signals;
- and
- outputting the restored signal before resampling when the digital signal is detected to be a resampled signal, while outputting the decimated signal when the digital signal is not detected to be a resampled signal.
Dependencies are inferred from the claim text.