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| PRACTICAL 601 FILTERS YUV ANTIALISING In many 4:2:2 YUV format A-D and D-A video interface applications operating at standard sampling rates of 13.5 MHz for the luminance (Y) channel and 6.75 MHz for the Colour Difference (U and V) channels a filter meeting the full requirements of Rec. ITU-R BT. 601-5 should be specified but cost may be prohibitive. Practical 601 filters allow a small compromise in performance resulting in significant cost savings which may be acceptable. * Choice of package format to suit requirement * Tight passband ripple specification Filter type Passband Shape Impedance (ohms) Sampling Frequency Insertion loss at 100 kHz End of Passband Amplitude ripple (dB) wrt 100 kHz * Flat and Sinx/x versions * Aqueously washable versions available Luminance Pre Flat 75 13.50 MHz < 1.5 dB 5.50 MHz < 0.05 to 5.25 MHz < 0.10 to 5.50 MHz 550 5 ns < 6 ns to 5.50 MHz > 12 dB Luminance Post Sinx/x 75 13.50 MHz < 4.5 dB 5.50 MHz < 0.05 to 5.25 MHz < 0.101 to 5.50 MHz 556 5 ns < 6 ns to 5.50 MHz > 12 dB 1 1 Chrominance Pre Flat 75 6.75 MHz Chrominance Post Sinx/x 75 6.75 MHz < 4.5 dB 2.2 MHz < 0.0502 to 2.20 MHz 1060 7 ns < 6 ns to 2.20 MHz < 12 ns to 2.40 MHz 2 > 6 dB < 1.5 dB 2.20 MHz < 0.050 to 2.20 MHz 1051 5 ns < 6 ns to 2.20 MHz <12 ns to 2.40 MHz > 6 dB Delay time at 200 kHz Group delay ripple wrt delay at 200 kHz Attenuation at 1/2 S.F. wrt loss at 100 kHz Start of stopband Stopband attenuation wrt loss at end of passband 8.00 MHz > 40 dB FL594 8.00 MHz > 40 dB FL595 4.00 MHz > 40 dB FL596 4.00 MHz > 40 dB FL597 Type number DR00024B package Type number DR00003A package FL400 FL470 FL423 FL471 1 2 Measured against sinx/x roll-off for a sampling frequency of 13.5 MHz. Measured against sinx/x roll-off for a sampling frequency of 6.75 MHz. (c) Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice Fara100d Page 1 of 2 Sep-05(B) PACKAGE DETAIL Faraday Technology Ltd. Croft Road Industrial Estate, Newcastle, Staffordshire ST5 0QZ. England. Fara100d Tel: Fax: Email: Web site: Page 2 of 2 + 44 (0)1782 661501 + 44 (0)1782 630101 sales@faradaytech.co.uk http://www.faradaytech.co.uk Sep-05(B) |
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