Implementation efficient digital picture-in-picture decoding met

Television – Basic receiver with additional function – For display of additional information

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348567, 348568, H04N 5445

Patent

active

058284214

ABSTRACT:
An implementation efficient video decoder suitable for use as a picture in picture decoder is described. In one embodiment, the video decoder receives primary and secondary bitstreams with the secondary bitstream including the video data intended to be displayed as inset pictures. The decoder uses many of the same circuit components on a time shared basis to decode both the main and inset pictures reducing the amount of circuitry required to implement the decoder. In one embodiment a preparser discards the majority of DCT coefficients in the secondary bitstream and the remaining data is variable length decoded and then variable length encoded using a non-MPEG compliant coding scheme prior to storing the inset picture data in a coded data buffer. Re-encoding of the selected inset picture data in this manner greatly reduces data storage requirements and simplifies the circuitry required to subsequently decode the inset picture data. To reduce frame memory requirements inset picture data is downsampled, stored and then upsampled prior to display thereby reducing inset picture frame memory buffer requirements.

REFERENCES:
patent: 4238773 (1980-12-01), Tsuboka et al.
patent: 4665438 (1987-05-01), Miron et al.
patent: 4931879 (1990-06-01), Koga et al.
patent: 5016106 (1991-05-01), Yong-Je et al.
patent: 5091785 (1992-02-01), Canfield
patent: 5206714 (1993-04-01), Kim
patent: 5208660 (1993-05-01), Yoshida
patent: 5237460 (1993-08-01), Miller et al.
patent: 5313303 (1994-05-01), Ersoz et al.
patent: 5335117 (1994-08-01), Park et al.
patent: 5367318 (1994-11-01), Beaudin et al.
patent: 5386241 (1995-01-01), Park
patent: 5390052 (1995-02-01), Kato et al.
patent: 5398072 (1995-03-01), Auld
patent: 5408270 (1995-04-01), Lim
patent: 5422677 (1995-06-01), Do
patent: 5467144 (1995-11-01), Saeger et al.
patent: 5477397 (1995-12-01), Naimpally et al.
A. Hoffman, B. Macq, J.J. Quisquater; New Technologies and New Services, Future Prospects of the Cable TV Neetworks, pp. 17-20 (date unknown).

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