JPS4987220A - - Google Patents
Info
- Publication number
- JPS4987220A JPS4987220A JP48091605A JP9160573A JPS4987220A JP S4987220 A JPS4987220 A JP S4987220A JP 48091605 A JP48091605 A JP 48091605A JP 9160573 A JP9160573 A JP 9160573A JP S4987220 A JPS4987220 A JP S4987220A
- Authority
- JP
- Japan
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/02—Amplitude modulation, i.e. PAM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/04—Colour television systems using pulse code modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Amplitude Modulation (AREA)
- Television Systems (AREA)
- Facsimile Image Signal Circuits (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3807572A GB1432373A (en) | 1972-08-15 | 1972-08-15 | Apparatus for producing digised signals for defining an amplitude modulated sub-carrier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS4987220A true JPS4987220A (ja) | 1974-08-21 |
JPS571924B2 JPS571924B2 (ja) | 1982-01-13 |
Family
ID=10401002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9160573A Expired JPS571924B2 (ja) | 1972-08-15 | 1973-08-15 |
Country Status (4)
Country | Link |
---|---|
US (1) | US3939303A (ja) |
JP (1) | JPS571924B2 (ja) |
DE (1) | DE2340913C3 (ja) |
GB (1) | GB1432373A (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8203599A (nl) * | 1982-09-17 | 1984-04-16 | Philips Nv | Hoofdeinde en ontvanger voor een signaaldistributiesysteem. |
DE3328025C1 (de) * | 1983-08-03 | 1985-02-14 | Institut für Rundfunktechnik GmbH, 8000 München | Farbtraegermodulator |
IL78972A (en) * | 1985-06-14 | 1991-04-15 | Mitsubishi Electric Sales Amer | Video optimized modulator-demodulator |
US4973977A (en) * | 1988-11-29 | 1990-11-27 | Comlux | Digital to amplitude modulated analog converter |
US5532820A (en) * | 1990-08-17 | 1996-07-02 | Samsung Electronics Co., Ltd. | Digital modulators for use with sub-nyquist sampling of raster-scanned samples of image intensity |
DE4426935A1 (de) * | 1994-07-29 | 1996-02-01 | Rohde & Schwarz | Digitaler Restseitenband-Modulator für Videosignale |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3548342A (en) * | 1968-10-15 | 1970-12-15 | Ibm | Digitally controlled amplitude modulation circuit |
US3793597A (en) * | 1971-11-08 | 1974-02-19 | Tull Aviation Corp | Modulation synthesis method and apparatus |
-
1972
- 1972-08-15 GB GB3807572A patent/GB1432373A/en not_active Expired
-
1973
- 1973-08-13 DE DE2340913A patent/DE2340913C3/de not_active Expired
- 1973-08-13 US US05/387,769 patent/US3939303A/en not_active Expired - Lifetime
- 1973-08-15 JP JP9160573A patent/JPS571924B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2340913C3 (de) | 1981-10-15 |
GB1432373A (en) | 1976-04-14 |
DE2340913B2 (de) | 1981-04-02 |
JPS571924B2 (ja) | 1982-01-13 |
US3939303A (en) | 1976-02-17 |
DE2340913A1 (de) | 1974-03-28 |