Patent ID: 6587638
Filing Date: 2003-07-01
Classification: H04N

Abstract:
In a recording/reproducing apparatus having a converter which converts a first analog video signal into a digital signal; a compressor which compresses the converted digital signal; a recorder which records the compressed digital signal on a recording media; a reproducer which reproduces the compressed digital signal from the recording media; and an expander which expands the compressed digital signal, the improvement comprising:a converter which converts a digital signal which is at least one of compressed and expanded into a second analog video signal; and a switcher which switches said first analog video signal before it is converted into a digital signal and said second analog video signal, whereby an output analog video signal is displayed in a picture display device; and wherein the improvement further comprises: a detector which detects data, which is superimposed over a vertical blanking period and is deleted from the first analog video signal in the process of at least one of compression and expansion, at an upstream side of the compressor which compresses the converted digital signal; a superimposer which encodes and superimposes said detected data over said compressed signal; a processor which extracts said superimposed data from the compressed signal; and an adder which adds the extracted data to the signal expanded by the expander, whereby the output obtained from said adder is applied to said converter which produces said second analog video signal.