DE10140289A1 - Device for reducing bandwidth in MPEG2 video streams has digital tuner, interface for connecting to host, transport stream interface logic, digital signal processor with linked memory and universal serial bus controller - Google Patents
Device for reducing bandwidth in MPEG2 video streams has digital tuner, interface for connecting to host, transport stream interface logic, digital signal processor with linked memory and universal serial bus controllerInfo
- Publication number
- DE10140289A1 DE10140289A1 DE2001140289 DE10140289A DE10140289A1 DE 10140289 A1 DE10140289 A1 DE 10140289A1 DE 2001140289 DE2001140289 DE 2001140289 DE 10140289 A DE10140289 A DE 10140289A DE 10140289 A1 DE10140289 A1 DE 10140289A1
- Authority
- DE
- Germany
- Prior art keywords
- transport stream
- bandwidth
- signal processor
- digital
- digital signal
- 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.)
- Withdrawn
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]
- H04N21/40—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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
-
- 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
- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/4143—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a Personal Computer [PC]
-
- 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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4344—Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
-
- 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 MPEG packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
-
- 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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Bandbreitenreduzierung von MPEG2-Videoströmen. The invention relates to a method and an apparatus for reducing the bandwidth of MPEG2 video streams.
Seit geraumer Zeit gibt es Bestrebungen, das Medium Fernsehen mit dem Medium PC zu verschmelzen. Als Beispiel seinen hier sogenannte TV-Tuner-Erweiterungskarten genannt, die den Empfang von Fernsehprogrammen auf PCs ermöglichen. Diese Erweiterungskarten werden zur Zeit für den analogen und digitalen Fernsehempfang angeboten. Zu beachten ist dabei, Dass diese Erweiterungskarten nicht gerade nutzerfreundlich sind, da sie für den Einbau in einen PC ein bestimmtes Maß an technischem Verständnis voraussetzen. Weiterhin setzt die Möglichkeit der Benutzung solcher Erweiterungskarten immer einen PC mit entsprechenden Erweiterungsmöglichkeiten (Slots) voraus. Der TV-Empfang auf mobilen PCs (Laptops) ist mit solchen Erweiterungskarten also nicht möglich. For some time now, efforts have been made to use television as a medium for PC merge. As an example of his so-called TV tuner expansion cards, which enable the reception of television programs on PCs. These expansion cards are currently offered for analog and digital television reception. To be noted is that these expansion cards are not exactly user-friendly because they are for the Installation in a PC requires a certain degree of technical understanding. Furthermore, the possibility of using such expansion cards always sets one PC with corresponding expansion options (slots) ahead. The TV reception on Mobile PCs (laptops) are therefore not possible with such expansion cards.
Um den TV-Empfang auf allen PCs - auch auf Laptops - zu ermöglichen, gibt es Bestrebungen eine Standard-Schnittstelle der PCs für die Übertragung von Audio- und Video-Daten zu benutzen. Hierbei ist der Umstand zu beachten, dass zur Zeit keine der verbreiteten Standard-Schnittstellen eine genügend hohe Bandbreite für die Übertragung von unkomprimierten Audio und Video zur Verfügung stellen kann. Sinnvoll erscheint hier nur die Übertragung von MPEG2-AV-Streams, die aus einem digitalen Tuner nach DVB- Standard gewonnen werden. Die üblichen Bitraten solcher TV-Sendungen bewegen sich durchschnittlich zwischen 2 Mbit/s bis 6 Mbit/s. Für solche Datenraten ist aus heutiger Sicht nur die USB-Schnittstelle geeignet. Einige Kanäle senden Bitraten bis über 10 Mbit/s, die aber eher die Ausnahme sind. In order to enable TV reception on all PCs - including laptops - there are Endeavors to provide a standard interface for the transmission of audio and PCs Use video data. It should be noted here that none of the standard interfaces have a sufficiently high bandwidth for transmission of uncompressed audio and video can provide. It makes sense here only the transmission of MPEG2-AV streams from a digital tuner to DVB- Standard won. The usual bit rates of such TV programs are moving on average between 2 Mbit / s to 6 Mbit / s. For such data rates from today's perspective only the USB interface is suitable. Some channels send bit rates up to over 10 Mbit / s but are rather the exception.
Für Standard-Geräte, wie Set-Top-Boxen, sind die verschiedenen Bitraten kein Problem, hingegen ergeben sich für die Datenübertragung am USB-Port (1.1 Spezifikation) einige Bandbreitenengpässe. Für eine kontinuierliche Datenübertragung (Isochrone Transfer) stehen effektiv nur 8 Mbit/s zur Verfügung. Um dennoch MPEG2-Videodaten mit einer größeren Bitrate übertragen zu können, macht sich eine Datenreduzierung erforderlich. For standard devices like set-top boxes, the different bit rates are not a problem, on the other hand, there are some for data transmission on the USB port (1.1 specification) Bandwidth bottlenecks. For continuous data transfer (isochronous transfer) effectively only 8 Mbit / s are available. To still MPEG2 video data with a To be able to transmit a higher bit rate, data reduction is necessary.
Derzeit gibt es verschiedene Systeme (Set-Top-Box, PCI-Karten, . . .), womit man TV- Programme empfangen kann, welche nach dem DVB-Standard in MPEG2 ausgestrahlt werden. Allen diesen Systemen ist gemein, dass sie keine Probleme in der Bewältigung mit Datenströmen haben, die eine hohe Bitrate aufweisen. Ein TV-Empfang auf mobilen PCs ist aber, wie auch schon weiter oben gesagt, nicht möglich. Es gibt weiter Bestrebungen für Empfangssystem mit geringen Ansprüchen z. B. kleines 5"-Display mit 320 × 273 Bildpunkten eine sendeseitige Anpassung der Bit- bzw. Kompressionsraten vorzunehmen (DE 196 23 933). Dieser neue Datenstrom muss zusätzlich zu den originalen Daten parallel mit gesendet werden, wobei die Übertragungsbreite für andere Daten eingeschränkt wird. Für TV-Kanäle würde dies bedeuten, dass alle Kanäle mit originaler Bitrate und mit reduzierter Bitrate ausgestrahlt werden müssten. Es scheint auf Grund der enormen Übertragungskosten eine Bandbreitenreduzierung nur im Empfangsgerät vorzunehmen, wenn sie benötigt wird. There are currently various systems (set-top box, PCI cards,...) With which TV Can receive programs that are broadcast according to the DVB standard in MPEG2 become. All these systems have in common that they have no problems in coping with them Have data streams that have a high bit rate. A TV reception on mobile PCs however, as already mentioned above, is not possible. There are still efforts for Reception system with low demands for. B. Small 5 "display with 320 × 273 To carry out an adaptation of the bit or compression rates on the transmission side (DE 196 23 933). This new data stream must be parallel to the original data are sent with, whereby the transmission width for other data is restricted. For TV channels, this would mean that all channels with the original bit rate and with reduced bit rate would have to be broadcast. It seems because of the enormous Transmission costs to reduce bandwidth only in the receiving device, when it's needed.
Aufgabe der Erfindung ist es, die Bandbreite des eingestellten TV-Kanals, der mit höherer Bandbreite sendet als der USB-Schnittstelle zuträglich ist, so zu beeinflussen, dass die Übertragung der Daten möglich und der inhaltliche Zusammenhang der laufenden Sendung nicht wesentlich beeinträchtigt wird. The object of the invention is the bandwidth of the set TV channel, the higher Sending bandwidth than the USB interface is conducive to influencing that Data transfer possible and the context of the current program is not significantly affected.
Erfindungsgemäß wird das dadurch erreicht, dass ein Eingangs-Transportstrom über eine Transportstrom-Interfacelogik in einem digitalen Signalprozessor für den weiteren Transport zu einem USB-Controller gefiltert und umstrukturiert wird und gleichzeitig der gefilterte Transportstrom vor seiner Übertragung zum USB-Controller in dem digitalen Signalprozessor auf Übertragbarkeit seiner Bandbreite geprüft wird. Je nach Bedarf werden die existierenden MPEG-Datenstrukturen auf MPEG2-Ebene untersucht und neu strukturiert. Das Bandbreitenmanagement wird automatisch eingeschaltet, wenn eine Datenreduktion notwendig wird. Eine dynamische Bandbreitenoptimierung unterbindet den kompletten Abbruch des Datenstroms und beugt den damit verbundenen 100%igen Informationsverlust vor. According to the invention this is achieved in that an input transport stream via a Transport stream interface logic in a digital signal processor for the further Transport to a USB controller is filtered and restructured while maintaining the filtered transport stream before its transfer to the USB controller in the digital Signal processor is checked for portability of its bandwidth. As required Existing MPEG data structures at MPEG2 level are examined and new structured. Bandwidth management is switched on automatically when a Data reduction becomes necessary. Dynamic bandwidth optimization is prevented the complete interruption of the data stream and prevents the associated 100% Loss of information.
Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden. The invention will be explained in more detail below using an exemplary embodiment.
Es zeigen: Show it:
Fig. 1 ein vereinfachtes Blockschaltbild des DVB-USB-Converter, FIG. 1 is a simplified block diagram of the DVB-USB converter,
Fig. 2 ein MPEG2-Videostream, Fig. 2 shows an MPEG2 video stream,
Fig. 3 einen Datenflussplan. Fig. 3 is a data flow diagram.
Nach Fig. 1 besteht der DVB-USB-Converter 1 zum Empfang von digitalen MPEG- Transportstromdaten aus einem digitalen Tuner 2, als Empfangseinheit nach dem DVB- Standard, einer Schnittstelle nach der USB 1.1 Spezifikation zur Verbindung an einer handelsüblichen Host (PC, Mac, . . .), einer Transportstrom-Interfacelogik 6, einem digitalen Signalprozessor 3 mit angeschlossener Peripherie, bestehend aus einem Speicher 4 und einem USB-Controller 5. According to Fig. 1, the DVB-USB converter 1 for receiving digital MPEG transport stream data consists of a digital tuner 2 , as a receiving unit according to the DVB standard, an interface according to the USB 1.1 specification for connection to a commercially available host (PC, Mac ,...), a transport stream interface logic 6 , a digital signal processor 3 with connected peripherals, consisting of a memory 4 and a USB controller 5 .
Aus dem digitalen Tuner 2 (Sat, Kabel oder terrestrisch) gelangt ein paketorientiert aufgebauter Transportstrom TS, wobei die Pakete eine Indentifizierungsnummer PID besitzen, durch die Transportstrom-Interfacelogik 6 zum digitalen Signalprozessor 3. Im digitalen Signalprozessor 3 wird der gesamte Transportstrom TS einem PID-Filtering unterzogen, das heißt, es werden alle Pakete ausgefildert (Audio-, Video- und Servicedaten), die den zuvor eingestellten Indentifizierungsnummern PIDs entsprechen. Die gefilterten Transportstrompakete werden in dem Speicher 4 zwischengespeichert, bevor sie durch den USB-Controller 5 eigenständig zu einem nicht weiter dargestellten PC übertragen werden. Beim Zwischenspeichern im Speicher 4 wird die Bandbreite des Videostroms ermittelt, indem die Anzahl der Datenworte, die in einer konstanten Referenzzeit übertragen werden, bestimmt wird. Gleichzeitig wird der Füllstand des Speichers 4 überwacht. Wird hierbei ein oberer Grenzwert von z. B. 90% überschritten, tritt eine Bandbreitenminimierung der Videodaten in Kraft. Bei der Bandbreitenminimierung der Videodaten auf MPEG2-Ebene werden die existierenden MPEG-Datenstrukturen untersucht und je nach Bedarf umstrukturiert. Wie aus Fig. 2 in Verbindung mit Fig. 3 zu ersehen, wird als erstes der Video-Sequenz-Header der nächsten Video-Sequenz gesucht. Eine Video-Sequenz besteht aus den Daten für ein Standbild I-Frame und mehreren Datenstrukturen Bund P-Frame, welche die dynamischen Änderungen des Standbildes I- Frame enthalten. Danach werden die signifikanten Bits für den Beginn von I-, B- und P- Frame gesucht, um zu erkennen, wo die einzelnen I-, B- und P-Frames und Sequenzen Beginnen und Enden. Aus den so gewonnenen Informationen wird die Möglichkeit geschaffen, den Inhalt des neuen Videostroms zu verändern. Abschließend werden - je nach Programmierung - entweder nur noch I-Frames in den Speicher 4 übertragen oder I- Frames und eine verminderte Anzahl zugehöriger B- und P-Frames. In diesem Modus werden die MPEG2-Audio-Daten, wie auch aus Fig. 3 zu erkennen, unberührt weiter in den Speicher 4 geschrieben. From the digital tuner 2 (satellite, cable or terrestrial), a packet-oriented transport stream TS, where the packets have an identification number PID, passes through the transport stream interface logic 6 to the digital signal processor 3 . In the digital signal processor 3 , the entire transport stream TS is subjected to PID filtering, that is to say all packets (audio, video and service data) that correspond to the previously set identification numbers PIDs are displayed. The filtered transport stream packets are temporarily stored in the memory 4 before they are independently transferred by the USB controller 5 to a PC (not shown further). When buffering in memory 4 , the bandwidth of the video stream is determined by determining the number of data words that are transmitted in a constant reference time. At the same time, the fill level of the memory 4 is monitored. If an upper limit of z. B. exceeded 90%, bandwidth minimization of the video data takes effect. When minimizing the bandwidth of the video data at MPEG2 level, the existing MPEG data structures are examined and restructured as required. As can be seen from FIG. 2 in connection with FIG. 3, the video sequence header of the next video sequence is first searched for. A video sequence consists of the data for a still picture I-frame and several data structures Bund P-frame, which contain the dynamic changes of the still picture I-frame. The significant bits for the start of I, B and P frames are then searched for in order to recognize where the individual I, B and P frames and sequences begin and end. The information obtained in this way creates the possibility of changing the content of the new video stream. Finally, depending on the programming, either only I frames are transferred to memory 4 or I frames and a reduced number of associated B and P frames. In this mode, the MPEG2 audio data, as can also be seen from FIG. 3, are further written into the memory 4 unaffected.
Die so umstrukturierten Daten nehmen jetzt nur noch bis zu 25% ihrer bisherigen Bandbreite ein. Unterschreitet die Speicherauslastung des Speichers 4 durch sinken der Bitrate des Orginalvideostroms wieder einen unteren Referenzwert, wird der Minimierungsmodus verlassen. The data restructured in this way now only takes up to 25% of its previous bandwidth. If the memory utilization of memory 4 falls below a lower reference value again due to the bit rate of the original video stream falling, the minimization mode is exited.
Zusammenfassend ist zu sagen, dass die aktuelle Bandbreite, die sich aus dem MPEG2-
Audio-Stream und dem MPEG2-Video-Stream zusammensetzt, des aus dem
Transportstrom gefilterten TV-Kanals ständig neu berechnet wird. Werden mehr Daten in
den Speicher 4 geschrieben als vom USB-Transfer bewältigt werden können, und wird
somit eine höhere Auslastung des Speichers 4 festgestellt, tritt automatisch der Modus der
reduzierten Bandbreite in Kraft. Sinkt die Auslastung des Speichers 4 wieder unter eine
untere Schwelle, wird dieser Standbildmodus wieder aufgehoben. Das Ergebnis ist eine
dynamische Bandbreitenoptimierung, die den kompletten Abbruch des Datenstroms
unterbindet und damit den 100%igen Informationsverlust vorbeugt.
Verwendete Bezugszeichen
1 DVB-USB-Converter
2 digitaler Tuner
3 digitaler Signalprozessor
4 Speicher
5 USB-Controller
6 Transportstrom-Interfacelogik
In summary, it can be said that the current bandwidth, which is composed of the MPEG2 audio stream and the MPEG2 video stream, of the TV channel filtered from the transport stream is constantly recalculated. If more data is written into the memory 4 than can be handled by the USB transfer, and thus a higher utilization of the memory 4 is determined, the mode of the reduced bandwidth automatically takes effect. If the utilization of the memory 4 drops again below a lower threshold, this still picture mode is canceled again. The result is a dynamic bandwidth optimization that prevents the complete interruption of the data stream and thus prevents 100% loss of information. Reference numbers used 1 DVB-USB converter
2 digital tuners
3 digital signal processor
4 memory
5 USB controllers
6 Transport stream interface logic
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001140289 DE10140289A1 (en) | 2001-08-16 | 2001-08-16 | Device for reducing bandwidth in MPEG2 video streams has digital tuner, interface for connecting to host, transport stream interface logic, digital signal processor with linked memory and universal serial bus controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2001140289 DE10140289A1 (en) | 2001-08-16 | 2001-08-16 | Device for reducing bandwidth in MPEG2 video streams has digital tuner, interface for connecting to host, transport stream interface logic, digital signal processor with linked memory and universal serial bus controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE10140289A1 true DE10140289A1 (en) | 2003-02-27 |
Family
ID=7695695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2001140289 Withdrawn DE10140289A1 (en) | 2001-08-16 | 2001-08-16 | Device for reducing bandwidth in MPEG2 video streams has digital tuner, interface for connecting to host, transport stream interface logic, digital signal processor with linked memory and universal serial bus controller |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE10140289A1 (en) |
Cited By (4)
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| WO2005013112A1 (en) * | 2003-08-03 | 2005-02-10 | Tsinghua University | Universal bidirectional serial data transport interface and its data stransport method |
| EP1515559A3 (en) * | 2003-07-18 | 2005-08-17 | Sony Corporation | Media converter |
| EP1592232A1 (en) * | 2004-02-20 | 2005-11-02 | Vbox Communications Ltd. | USB interface module for digital video broadcasting |
| CN100353746C (en) * | 2004-09-21 | 2007-12-05 | 深圳国微技术有限公司 | Conversion device and method for public interfacing digital television CI to USB mterface |
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| EP0917355A1 (en) * | 1997-11-14 | 1999-05-19 | Sony International (Europe) GmbH | Distribution of MPEG-2 transport streams on the IEEE 1394-based home network |
| WO1999060521A2 (en) * | 1998-05-18 | 1999-11-25 | Sony Electronics Inc. | Variable length decoder for decoding digitally encoded video signals |
| EP1017237A2 (en) * | 1998-12-28 | 2000-07-05 | Sony Corporation | Method of transmitting and receiving data, electronic apparatus, and medium for supplying a data transmitting/receiving program |
| WO2000064186A2 (en) * | 1999-04-01 | 2000-10-26 | Ravisent Technologies, Inc. | Memory management method for high speed streaming data processing in a computer device |
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2001
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| EP0917355A1 (en) * | 1997-11-14 | 1999-05-19 | Sony International (Europe) GmbH | Distribution of MPEG-2 transport streams on the IEEE 1394-based home network |
| WO1999060521A2 (en) * | 1998-05-18 | 1999-11-25 | Sony Electronics Inc. | Variable length decoder for decoding digitally encoded video signals |
| EP1017237A2 (en) * | 1998-12-28 | 2000-07-05 | Sony Corporation | Method of transmitting and receiving data, electronic apparatus, and medium for supplying a data transmitting/receiving program |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1515559A3 (en) * | 2003-07-18 | 2005-08-17 | Sony Corporation | Media converter |
| US7864801B2 (en) | 2003-07-18 | 2011-01-04 | Sony Corporation | Media converter |
| WO2005013112A1 (en) * | 2003-08-03 | 2005-02-10 | Tsinghua University | Universal bidirectional serial data transport interface and its data stransport method |
| US8195850B2 (en) | 2003-08-03 | 2012-06-05 | United Technologies Inc. | Universal bidirectional serial data transport interface and its data transport method |
| EP1592232A1 (en) * | 2004-02-20 | 2005-11-02 | Vbox Communications Ltd. | USB interface module for digital video broadcasting |
| CN100353746C (en) * | 2004-09-21 | 2007-12-05 | 深圳国微技术有限公司 | Conversion device and method for public interfacing digital television CI to USB mterface |
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