CA2522856A1 - Video size conversion and transcoding from mpeg-2 to mpeg-4 - Google Patents

Video size conversion and transcoding from mpeg-2 to mpeg-4 Download PDF

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Publication number
CA2522856A1
CA2522856A1 CA002522856A CA2522856A CA2522856A1 CA 2522856 A1 CA2522856 A1 CA 2522856A1 CA 002522856 A CA002522856 A CA 002522856A CA 2522856 A CA2522856 A CA 2522856A CA 2522856 A1 CA2522856 A1 CA 2522856A1
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Prior art keywords
mpeg
bitstream
transcoder
frames
another embodiment
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Granted
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CA002522856A
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French (fr)
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CA2522856C (en
Inventor
Xuemin Chen
Krit Panusopone
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Google Technology Holdings LLC
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Priority claimed from US09/590,928 external-priority patent/US6647061B1/en
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Publication of CA2522856C publication Critical patent/CA2522856C/en
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Abstract

A transcoder architecture that provides the lowest possible complexity with a small error, e.g., for converting an MPEG-2 bitstream into an MPEG-4 bitstream. The transcoder reads header information (304) from an input bitstream and provides a corresponding header in the new format for the output bitstream. In one embodiment (Fig. 3), a low complexity front-to-back transcoder (with B frames disabled) avoids the need for motion compensation processing. In another embodiment (Fig. 4), a transcoder architecture that minimizes drift error (with B frames enabled) is provided. In another embodiment (Fig. 5), a size transcoder (with B frames enabled) is provided, e.g., to convert a bitstream of ITU-R 601 interlaced video coding with MPEG-2 MP@ ML into a simple profile MPEG-4 bitstream which Contains SIF progressive video suitable for a streaming video application. For spatial downscaling of field-mode DCT blocks, vertical and horizontal downscaling techniques are combined to use sparse matrixes to reduce computations.
CA002522856A 2000-06-09 2001-05-25 Video size conversion and transcoding from mpeg-2 to mpeg-4 Expired - Lifetime CA2522856C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/590,928 US6647061B1 (en) 2000-06-09 2000-06-09 Video size conversion and transcoding from MPEG-2 to MPEG-4
US09/590,928 2000-06-09
CA002410573A CA2410573C (en) 2000-06-09 2001-05-25 Video size conversion and transcoding from mpeg-2 to mpeg-4

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CA002410573A Division CA2410573C (en) 2000-06-09 2001-05-25 Video size conversion and transcoding from mpeg-2 to mpeg-4

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CA2522856A1 true CA2522856A1 (en) 2001-12-13
CA2522856C CA2522856C (en) 2008-01-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114270842A (en) * 2019-08-27 2022-04-01 现代自动车株式会社 Video encoding and decoding with differential encoding
CN114640796A (en) * 2022-03-24 2022-06-17 北京字跳网络技术有限公司 Video processing method and device, electronic equipment and storage medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114270842A (en) * 2019-08-27 2022-04-01 现代自动车株式会社 Video encoding and decoding with differential encoding
CN114640796A (en) * 2022-03-24 2022-06-17 北京字跳网络技术有限公司 Video processing method and device, electronic equipment and storage medium
CN114640796B (en) * 2022-03-24 2024-02-09 北京字跳网络技术有限公司 Video processing method, device, electronic equipment and storage medium

Also Published As

Publication number Publication date
CA2522856C (en) 2008-01-15

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