throbber
Case 1:20-cv-01202-UNA Document 1-4 Filed 09/09/20 Page 1 of 27 PageID #: 106
`Case 1:20-cv-01202—UNA Document 1-4 Filed 09/09/20 Page 1 of 27 PageID #: 106
`
`
`
`
`
`EXHIBIT 4
`
`EXHIBIT 4
`
`

`

`( 12 ) United States Patent
`Chan et al .
`
`US 10,484,749 B2
`( 10 ) Patent No .:
`( 45 ) Date of Patent :
`* Nov . 19 , 2019
`
`US010484749B2
`
`( 54 ) SYSTEMS AND METHODS FOR SECURE
`PLAYBACK OF ENCRYPTED ELEMENTARY
`BITSTREAMS
`( 71 ) Applicant : DIVX , LLC , San Diego , CA ( US )
`( 72 ) Inventors : Francis Yee - Dug Chan , San Diego , CA
`( US ) ; Kourosh Soroushian , San Diego ,
`CA ( US ) ; Andrew Jeffrey Wood , San
`Diego , CA ( US )
`( 73 ) Assignee : DIVX , LLC , San Diego , CA ( US )
`Subject to any disclaimer , the term of this
`( * ) Notice :
`patent is extended or adjusted under 35
`U.S.C. 154 ( b ) by 0 days .
`This patent is subject to a terminal dis
`claimer .
`( 21 ) Appl . No .: 16 / 136,170
`Sep. 19 , 2018
`( 22 ) Filed :
`( 65 )
`Prior Publication Data
`US 2019/0020928 A1
`Jan. 17 , 2019
`Related U.S. Application Data
`( 63 ) Continuation of application No. 15 / 615,626 , filed on
`Jun . 6 , 2017 , now Pat . No. 10,212,486 , which is a
`( Continued )
`
`( 51 ) Int . Ci .
`H04L 29/06
`H04N 21/6334
`
`( 2006.01 )
`( 2011.01 )
`( Continued )
`
`( 52 ) U.S. Ci .
`CPC
`H04N 21/63345 ( 2013.01 ) ; H04L 63/0428
`( 2013.01 ) ; H04L 65/607 ( 2013.01 ) ;
`( Continued )
`Field of Classification Search
`None
`See application file for complete search history .
`
`( 58 )
`
`( 56 )
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`4,009,331 A
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`
`2/1977 Goldmark et al .
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`( Continued )
`FOREIGN PATENT DOCUMENTS
`
`AU
`CN
`
`5/2015
`2010203605 B2
`12/1997
`1169229
`( Continued )
`
`OTHER PUBLICATIONS
`International Preliminary Report on Patentability for International
`Application No. PCT / US2010 / 56733 , dated Jun . 5 , 2012 , 5 pgs .
`( Continued )
`
`Primary Examiner Malcolm Cribbs
`( 74 ) Attorney , Agent , or Firm
`- KPPB LLP
`
`( 57 )
`ABSTRACT
`Systems and methods for providing multimedia content
`from one process or component to another process or
`component over an unsecured connection are provided . One
`embodiment includes obtaining the cryptographic informa
`tion , extracting the at least partially encrypted video data
`from the container file to create an elementary bitstream ,
`enciphering the cryptographic information , inserting the
`cryptographic information in the elementary bitstream , pro
`viding the elementary bitstream to a video decoder , extract
`ing the cryptographic information from the elementary bit
`stream at the video decoder , deciphering the cryptographic
`information , decrypting the elementary bitstream with the
`cryptographic information and decoding the elementary
`bitstream for rendering on a display device using the video
`decoder .
`
`18 Claims , 8 Drawing Sheets
`
`21
`
`22
`
`Case 1:20-cv-01202-UNA Document 1-4 Filed 09/09/20 Page 2 of 27 PageID #: 107
`
`DRM
`
`Te
`
`DRM
`
`Video
`
`C
`
`FRAME KEY
`
`.24
`
`23
`
`

`

`US 10,484,749 B2
`Page 2
`
`( 56 )
`
`( 2011.01 )
`( 2011.01 )
`( 2011.01 )
`( 2011.01 )
`( 2011.01 )
`( 2011.01 )
`
`Related U.S. Application Data
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`Aug. 28 , 2015 , now Pat . No. 9,706,259 , which is a
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`Nov. 15 , 2010 , now Pat . No. 8,781,122 .
`( 60 ) Provisional application No. 61 / 266,982 , filed on Dec.
`4 , 2009 .
`( 51 ) Int . Ci .
`H04N 21/235
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`( 2013.01 ) ; H04N 21/23614 ( 2013.01 ) ; H04N
`21/4302 ( 2013.01 ) ; H04N 21/4348 ( 2013.01 ) ;
`H04N 21/4405 ( 2013.01 )
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`Case 1:20-cv-01202-UNA Document 1-4 Filed 09/09/20 Page 7 of 27 PageID #: 112
`
`

`

`US 10,484,749 B2
`Page 7
`
`( 56 )
`
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`Case 1:20-cv-01202-UNA Document 1-4 Filed 09/09/20 Page 8 of 27 PageID #: 113
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