H04N 21/23897
By partially encrypting
Official title: {by partially encrypting, e.g. encrypting only the ending portion of a movie}
H04N21/23897 (By partially encrypting) appears on 63 US grants and 67 published applications in this corpus.
Search patents in H04N- Granted patents
- 63
- Published applications
- 67
- Assignees
- 30
- Inventors
- 78
- Latest grant
- 22 Feb 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 0 | 8 |
| 2004 | 0 | 3 |
| 2005 | 0 | 4 |
| 2006 | 6 | 11 |
| 2007 | 6 | 12 |
| 2008 | 5 | 4 |
| 2009 | 6 | 5 |
| 2010 | 16 | 6 |
| 2011 | 3 | 1 |
| 2012 | 2 | 3 |
| 2013 | 2 | 1 |
| 2014 | 6 | 2 |
| 2015 | 3 | 1 |
| 2016 | 2 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Methods, devices and system for generating a watermarked stream22 Feb 2022US 11,259,057 B2Nagravision S. A.
- Signal processing apparatus, signal processing method, program, and signal transmission system22 Jun 2021US 11,044,439 B2Sony Corporation
- Generating fingerprinted content data for provision to receivers16 Jul 2019US 10,355,867 B2Irdeto B. V.
- Encoder, decoder and methods employing partial data encryption11 Jun 2019US 10,320,557 B2Gurulogic Microsystems Oy
- Broadcasting variants of digital signals in a conditional access system27 Dec 2016US 9,532,006 B2Irdeto B. V.
- Methods, devices and system for generating a watermarked stream31 Oct 2019US 2019/0335213 A1Nagravision S. A.
- Signal processing apparatus, signal processing method, program, and signal transmission system11 Oct 2018US 2018/0295319 A1Sony Corporation
- Encoder, decoder and methods employing partial data encryption28 Sep 2017US 2017/0279604 A1Gurulogic Microsystems Oy
- Session based watermarking of media content using encrypted content streams13 Oct 2016US 2016/0301958 A1Divx, LLC
- Generating fingerprinted content data for provision to receivers28 May 2015US 2015/0149785 A1Irdeto B. V.
Most cited
By later US patents
- Elementary stream partial encryption165US 7,124,303 B2Sony Corporation · 2006
- Apparatus for scrambling a digital video signal148US 5,600,721 ASony Corporation · 1997
- Decoding and decryption of partially encrypted information145US 7,127,619 B2Sony Corporation · 2006
- Critical packet partial encryption141US 7,336,787 B2Sony Corporation · 2008
- Time division partial encryption110US 7,139,398 B2Sony Corporation · 2006