ES2009671A6 - Digital television receiver audio circuit - Google Patents
Digital television receiver audio circuitInfo
- Publication number
- ES2009671A6 ES2009671A6 ES8803842A ES8803842A ES2009671A6 ES 2009671 A6 ES2009671 A6 ES 2009671A6 ES 8803842 A ES8803842 A ES 8803842A ES 8803842 A ES8803842 A ES 8803842A ES 2009671 A6 ES2009671 A6 ES 2009671A6
- Authority
- ES
- Spain
- Prior art keywords
- audio signal
- fed
- output
- audio circuit
- phase
- 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.)
- Expired
Links
Landscapes
- Television Systems (AREA)
Abstract
The audio circuit has the analogue video/audio signal mixture (va) fed to an A/D converter (ad) via an analogue anti-aliasing low-pass filter (af). The video signal is extracted from the output of the A/D converter (ad) via a filter structure (bp, dz, tp). The digital audio signal (ds) is fed to a phase splitter (ps) with a 0 degree output (aO) and a 90 degree output (a9) fed to a phase discriminator (pd). The latter provides as audio signal with a demodulated amplitude. The phase output (ap) of the phase discriminator (pd) supplies the DQPSK partial decoder of the 'NICAM' decorder (nd) and provides the frequency-modulated audio signal via a differentiation stage (dt).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8803842A ES2009671A6 (en) | 1988-12-19 | 1988-12-19 | Digital television receiver audio circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES8803842A ES2009671A6 (en) | 1988-12-19 | 1988-12-19 | Digital television receiver audio circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2009671A6 true ES2009671A6 (en) | 1989-10-01 |
Family
ID=8259439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES8803842A Expired ES2009671A6 (en) | 1988-12-19 | 1988-12-19 | Digital television receiver audio circuit |
Country Status (1)
| Country | Link |
|---|---|
| ES (1) | ES2009671A6 (en) |
-
1988
- 1988-12-19 ES ES8803842A patent/ES2009671A6/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| SA6 | Expiration date (snapshot 920101) |
Free format text: 2008-12-19 |
|
| FD1A | Patent lapsed |
Effective date: 20081220 |