METHOD AND APPARATUS FOR ENCODING A VIDEO STREAM HAVING A TRANSPARENCY INFORMATION CHANNEL

摘要

Method for encoding a video stream having a transparency information channel in view of a predetermined target bit rate for said transparency information channel, comprising: tentatively applying a first encoding (130) to said transparency information channel, said first encoding (130) comprising lossless vector graphics encoding; if said first encoding results in an encoded bitrate within said predetermined target bitrate (140), selecting said first encoding (150) to produce an encoded version of said transparency information channel; otherwise, tentatively applying a second encoding (160) to said transparency information channel, said second encoding (160) comprising a mathematical representation encoding scheme; if said second encoding results in an encoded bitrate within said predetermined target bitrate (170), selecting said second encoding (180) to produce an encoded version of said transparency information channel; otherwise, selecting a third encoding (190) to produce an encoded version of said transparency in formation channel, said third encoding comprising MPEG-based encoding.

主权项

1. A method for encoding a video stream having a first transparency information channel in view of a predetermined target bit rate for said first transparency information channel, said method comprising:
tentatively applying a first encoding (130) to a portion of said first transparency information channel, said first encoding (130) comprising a lossless vector graphics encoding scheme; if said first encoding results in an encoded bitrate within said predetermined target bitrate (140), selecting said first encoding (150) to produce an encoded version of said portion of said first transparency information channel; otherwise, tentatively applying a second encoding (160) to said portion of said first transparency information channel, said second encoding (160) comprising a mathematical representation encoding scheme; if said second encoding results in an encoded bitrate within said predetermined target bitrate (170), selecting said second encoding (180) to produce an encoded version of said portion of said first transparency information channel; otherwise, selecting a third encoding (190) to produce an encoded version of said portion of said first transparency information channel, said third encoding comprising an MPEG-based encoding scheme.