The market success of the PXL2000 was ultimately quite low with its targeted child demographic, in part due to its high pricing. An anti-aliasing low-pass filter is included in the final video output circuit. Since each half of the frame store includes only 10 800 pixels in its 120 × 90 array, the same as the CCD, the display resolution was deemed to be marginal, and black borders were added around the picture, squashing the framestore image content into the middle of the frame, preserving pixels that would otherwise be lost in overscan.
It scans the 120 × 90 pixel CCD 15 times per second, feeding the results through a filtering circuit, and then to a frequency modulation circuit driving the left channel of the cassette head, as well as to an ADC, which creates the final image for viewing.įor playback and view-through purposes, circuits read image data from either a recorded cassette or the CCD and fill half a digital frame store at the PXL reduced rate, while scanning the other half of the frame store at normal NTSC rates. In order to reduce the amount of information recorded to fit within the narrow bandwidth of the sped-up audio cassette, the ASIC generates slower video timings than conventional TVs use. The PXL2000 records the video information on the left audio channel of the cassette, and the audio on the right. The higher speed is necessary because video requires a wider bandwidth than standard audio recording. In magnetic tape recording, the faster the tape speed, the more data can be stored per second. It records at roughly 16.875 inches (428.6 mm) per second, compared to a standard cassette's speed of 1.875 inches (47.6 mm) on a C90 CrO 2 ( chromium dioxide) cassette. The system stores 11 minutes of video and sound on a standard audio cassette tape by moving the tape at nearly nine times normal cassette playback speed. It has a plastic viewfinder and some control buttons. This is mounted in a plastic housing with a battery compartment and an RF video modulator selectable to either North American television channel 3 or 4. The PXL2000 consists of a simple aspherical lens, an infrared filter, a CCD image sensor, a custom ASIC (the Sanyo LA 7306M), and an audio cassette mechanism. He sold the invention rights to Fisher-Price in 1987 at the American International Toy Fair in Manhattan. The PXL2000 was created by a team of inventors led by James Wickstead.
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