US PATENT SUBCLASS 348 / 427-- .~.~ Including frequency folding (e.g., subsampling)

US PATENT SUBCLASS 348 / 427
.~.~ Including frequency folding (e.g., subsampling)

Current as of: June, 1999
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348 /	HD	TELEVISION

384	DF	BANDWIDTH REDUCTION SYSTEM {7}
426	DF	.~ Format type (e.g., HDTV or EDTV) {3}
427		.~.~ Including frequency folding (e.g., subsampling) {3}
428	DF	.~.~.~> Spotwobble (e.g., pixels from plural lines form single transmitted line)
429	DF	.~.~.~> Including video related information (e.g., digitally assisted television)
430	DF	.~.~.~> Using two or more frames {1}

DEFINITION

Classification: 348/427

Including frequency folding (e.g., subsampling):

(under subclass 426) Subject matter wherein additional information is embedded in the video signal by causing the alias components centered about the sampling frequency to extend into the normal baseband signal.

(1) Note. Systems that use a subcarrier to achieve the same effect are classified herein.

(2) Note. Recitation and recognition of frequency folding is not required for classification herein.

(3) Note. The lower sideband of the alias components has the F or F_s-F_v, with F_s being the sampling frequency, and F_v being the video frequency the higher F_v (the lower

the alias F_s-F_{v[end subscrpt]) the frequency folding occurs around F_s/2.}