Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
208 words
1 . An apparatus for converting video signals of a first format, which has a first number of horizontal scanning lines in a field and a picture display of a first aspect ratio, to video signals of a second format, which has a second number of horizontal scanning lines in a field and a picture display of a second aspect ratio, comprising: means (1) for receiving video signals of said first format; analog-to-digital converter means (2) for converting said video signals of said first format to digital video signals; memory means (6) having addresses capable of storing at least a field of said digital video signals of said first format; means (4) for writing said digital video signals at said addresses of said memory means (6); means (7) for reading from said addresses of said memory means (6) less samples of said digital video signals than have been written in said memory means (6); digital-to-analog converter means (8) for converting the digital video signals read from said memory means (6) into analog video signals of said second format; and controlling means (9, 12, 13A, 13B, 15A, 15B) for variably determining a start address of said addresses of the memory means (6) read by said means (7) for reading.
Claim 2
Dependent Claim
208 words
1 . An apparatus for converting video signals of a first format, which has a first number of horizontal scanning lines in a field and a picture display of a first aspect ratio, to video signals of a second format, which has a second number of horizontal scanning lines in a field and a picture display of a second aspect ratio, comprising: means (1) for receiving video signals of said first format; analog-to-digital converter means (2) for converting said video signals of said first format to digital video signals; memory means (6) having addresses capable of storing at least a field of said digital video signals of said first format; means (4) for writing said digital video signals at said addresses of said memory means (6); means (7) for reading from said addresses of said memory means (6) less samples of said digital video signals than have been written in said memory means (6); digital-to-analog converter means (8) for converting the digital video signals read from said memory means (6) into analog video signals of said second format; and controlling means (9, 12, 13A, 13B, 15A, 15B) for variably determining a start address of said addresses of the memory means (6) read by said means (7) for reading.
Claim 3
Dependent Claim
77 words
An apparatus according to claim 1; in which said first and second aspect ratios are each the ratio of the horizontal dimension to the vertical dimension of the respective picture display, and said first aspect ratio is larger than said second aspect ratio so that said start address determines a portion of the picture display of said first aspect ratio which is omitted at least at one side of said picture display of said second aspect ratio.
Claim 4
Dependent Claim
54 words
An apparatus according to claim 1 or 2; further comprising line number converting means connected between said memory means (6) and said digital-to-analog converter means (8) for converting the number of lines in a field of said digital video signals read from said memory means (6) from said first number to said second number.
Claim 5
Independent Claim
26 words
An apparatus according to one of the claims 1 to 3; in which said controlling means includes means (13A, 13B) for manually controlling said start address.
Claim 6
Dependent Claim
21 words
An apparatus according to claim 4; in which said manual controlling means is in the form of a joy stick (13A).
Claim 7
Dependent Claim
44 words
An apparatus according to claim 1, in which each of said first and second aspect ratios is the ratio of the horizontal dimension to the vertical dimension of the respective picture display, and said first aspect ratio is larger than said second aspect ratio.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 6; in which said first aspect ratio is 16:9 or 5:3 and said second aspect ratio is 4:3.
Claim 9
Dependent Claim
31 words
An apparatus according to claim 7; in which said first format has 1125 horizontal scanning lines in a frame and said second format has 525 horizontal scanning lines in a frame.
Claim 10
Dependent Claim
15 words
An apparatus according to claim 8; in which said memory means is a frame memory.