BR9913996A - Method of shuffling video lines, and method of writing data into memory - Google Patents
Method of shuffling video lines, and method of writing data into memoryInfo
- Publication number
- BR9913996A BR9913996A BR9913996-0A BR9913996A BR9913996A BR 9913996 A BR9913996 A BR 9913996A BR 9913996 A BR9913996 A BR 9913996A BR 9913996 A BR9913996 A BR 9913996A
- Authority
- BR
- Brazil
- Prior art keywords
- memory
- video lines
- writing data
- lines
- shuffling
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/169—Systems operating in the time domain of the television signal
- H04N7/1696—Systems operating in the time domain of the television signal by changing or reversing the order of active picture signal portions
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Signal Processing For Recording (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Dram (AREA)
Abstract
"MéTODO DE EMBARALHAR LINHAS DE VìDEO, E, MéTODO DE ESCREVER DADOS EM UMA MEMóRIA" A presente invenção ensina um método de embaralhar linhas de vídeo no qual o deslocamento da linha de vídeo é variável e controlado dependendo da distorção em um sistema dado. Uma série de permutações é aplicada à imagem original de tal maneira que as linhas são embaralhadas de uma maneira controlada para obter o deslocamento de linha dentro de uma faixa desejada. Os requisitos de memória são minimizados pela utilização de um método por intermédio do qual uma única memória tem dados escritos em localizações que foram lidas em uma etapa prévia. Onde uma DRAM é utilizada para a memória, um método de escrita é empregado para eliminar a necessidade por selecionar as fileiras e colunas da DRAM. (FIGURA 2)"METHOD OF MESSING VIDEO LINES, AND, METHOD OF WRITING DATA IN A MEMORY" The present invention teaches a method of shuffling video lines in which the displacement of the video line is variable and controlled depending on the distortion in a given system. A series of permutations are applied to the original image in such a way that the lines are scrambled in a controlled manner to obtain the line shift within a desired range. Memory requirements are minimized by using a method whereby a single memory has data written to locations that were read in a previous step. Where a DRAM is used for memory, a writing method is employed to eliminate the need for selecting the DRAM rows and columns. (FIGURE 2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10123398P | 1998-09-21 | 1998-09-21 | |
| PCT/US1999/021666 WO2000018122A1 (en) | 1998-09-21 | 1999-09-20 | Method and apparatus for shuffling and deshuffling video signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR9913996A true BR9913996A (en) | 2001-07-03 |
Family
ID=22283630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR9913996-0A BR9913996A (en) | 1998-09-21 | 1999-09-20 | Method of shuffling video lines, and method of writing data into memory |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU6050399A (en) |
| BR (1) | BR9913996A (en) |
| WO (1) | WO2000018122A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8204217B2 (en) | 2009-01-28 | 2012-06-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Lightweight streaming protection by sequence number scrambling |
| CN103024449B (en) * | 2011-09-28 | 2015-08-19 | 中国移动通信集团公司 | Stream of video frames processing method, video server and terminal equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MY108367A (en) * | 1991-09-30 | 1996-09-30 | Thomson Consumer Electronics S A | Method and apparatus for secure transmisson of video signals. |
| US5321748A (en) * | 1992-07-02 | 1994-06-14 | General Instrument Corporation, Jerrold Communications | Method and apparatus for television signal scrambling using block shuffling |
-
1999
- 1999-09-20 BR BR9913996-0A patent/BR9913996A/en not_active IP Right Cessation
- 1999-09-20 WO PCT/US1999/021666 patent/WO2000018122A1/en active Application Filing
- 1999-09-20 AU AU60503/99A patent/AU6050399A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU6050399A (en) | 2000-04-10 |
| WO2000018122A1 (en) | 2000-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 7A, 8A E 9A ANUIDADES. |
|
| B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO PUBLICADO NA RPI 1962 DE 12/08/2008. |