CA2026766A1 - Method for multiplexing an audio signal and an analogue video signal and sound still picture distribution system - Google Patents
Method for multiplexing an audio signal and an analogue video signal and sound still picture distribution systemInfo
- Publication number
- CA2026766A1 CA2026766A1 CA 2026766 CA2026766A CA2026766A1 CA 2026766 A1 CA2026766 A1 CA 2026766A1 CA 2026766 CA2026766 CA 2026766 CA 2026766 A CA2026766 A CA 2026766A CA 2026766 A1 CA2026766 A1 CA 2026766A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- video signal
- analog
- digital coding
- sound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract 5
- 230000005236 sound signal Effects 0.000 title abstract 4
- 230000014509 gene expression Effects 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 238000011002 quantification Methods 0.000 abstract 1
Landscapes
- Television Systems (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
PRECIS DE LA DIVULGATION:
Le procédé de multiplexage d'un signal sonore dans un signal vidéo analogique comporte une dynamique d'amplitude, dans lequel le signal sonore est multipléxé
dans une partie utile du signal vidéo analogique correspondant à une image vidéo, le procédé comporte les étapes suivantes: on numérise le signal sonore et on utilise des techniques de compression de débit pour obtenir une suite d'expressions numériques de codage; on mémorise temporairement la suite d'expression numériques de codage pour extrairement séquentiellement des sous-expression de codage à une fréquence en rapport avec une fréquence ligne du signal vidéo, chaque sous-expression numérique de codage comportant un nombre prédéterminé d'éléments binaires fonction de la dynamique d'amplitude du signal vidéo; on convertit sous forme analogique chaque sous-expression numérique de codage extraite pour fournir des échantillons analogiques dont le niveau d'amplitude est proportionnel à
la quantification de la sous-expression numérique de codage considérée; on impose une modulation d'amplitude des échantillons analogiques dans la partie utile du signal vidéo pour fournir un signal composite ayant le même format qu'un signal vidéo. On utilise le procédé selon l'invention pour la réalisation d'un système interactif de distribution d'images fixes sonorisées. PRECISION OF DISCLOSURE:
The process of multiplexing a sound signal in an analog video signal has a dynamic amplitude, in which the sound signal is multiplied in a useful part of the analog video signal corresponding to a video image, the method comprises the next steps: we digitize the sound signal and use flow compression techniques to achieve sequence of digital coding expressions; we memorize temporarily following digital coding expressions to sequentially extract subexpressions from coding at a frequency related to a line frequency of the video signal, each digital coding sub-expression having a predetermined number of bits function of the amplitude dynamics of the video signal; we convert each subexpression to analog form digital coding extracted to provide samples analog whose amplitude level is proportional to quantification of the digital coding sub-expression considered; we impose an amplitude modulation of analog samples in the useful part of the signal video to provide a composite signal with the same format than a video signal. The method according to the invention is used for the creation of an interactive distribution system still images with sound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2026766 CA2026766C (en) | 1990-10-02 | 1990-10-02 | Method for multiplexing an audio signal and an analogue video signal and sound still picture distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2026766 CA2026766C (en) | 1990-10-02 | 1990-10-02 | Method for multiplexing an audio signal and an analogue video signal and sound still picture distribution system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2026766A1 true CA2026766A1 (en) | 1992-04-03 |
| CA2026766C CA2026766C (en) | 1994-06-28 |
Family
ID=4146086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2026766 Expired - Fee Related CA2026766C (en) | 1990-10-02 | 1990-10-02 | Method for multiplexing an audio signal and an analogue video signal and sound still picture distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2026766C (en) |
-
1990
- 1990-10-02 CA CA 2026766 patent/CA2026766C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2026766C (en) | 1994-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |