Coded data generation or conversion – Digital code to digital code converters
Patent
1996-05-23
1998-11-17
Young, Brian K.
Coded data generation or conversion
Digital code to digital code converters
348408, H04J 306, H04L 100
Patent
active
058382658
ABSTRACT:
When digital data are being transmitted, parts of these data can be irreversibly destroyed by channel interference. Gaps produced in this way in the bit stream must be indicated and the respective decoder must be resynchronized. When encoding in accordance with the MPEG2 standard is used, the timing of this resynchronization is heavily dependent on the contents of the bit stream elements which have been lost. Thus, in the event of failure of the picture start codes or extension start codes of the frame layer which are important for the decoding, although the decoder will resynchronize to the slice-start code of the following slice layer, important information such as the time reference of the frame, for example, the frame type (I-, P-, B-frame) or else important parameters relating to the decoding of movement vectors may be false in this case, however. The result of this is that the decoder cannot decode at least one frame, it being possible for consequential errors to occur in addition, if frames which are to be predicted later are based on the missing frame. According to the invention, additional information is thus inserted into the slice header, which information contains the most important information about the respective frame and thus enables decoding even in the event of loss of the picture start code or extension start code.
REFERENCES:
patent: 4280224 (1981-07-01), Chethik
patent: 5377266 (1994-12-01), Katta et al.
patent: 5502494 (1996-03-01), Auld
patent: 5719646 (1998-02-01), Kikuchi et al.
D'Alessandro, Pierluigi & Lancini, Rosa "Video Coding Scheme Using DCT-Pyramid Vector Quantization" In: IEEE Transactions on IMage Prcoessing, vol. 4, No. 3, Mar. 1995, S. 309-319.
(Teil 5-1) Fernseh under Kino-Technik, 48.Jg., Nr.9/1994, S.460-466, S-468.
Deutsche Thomson Brandt GmbH
Jean-Pierre Peguy
Tropoli Joseph S.
Wein Frederick A.
Young Brian K.
LandOfFree
Method, encoder and decoder for resynchronization to a data stre does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method, encoder and decoder for resynchronization to a data stre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method, encoder and decoder for resynchronization to a data stre will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-888433