DE102010011098A1 - Audio and video data playback device installed in motor car, has buffer unit in which playback velocity of audio and video is reduced in relation to normal velocity, until preset quantity of audio and video is stored in buffer unit - Google Patents
Audio and video data playback device installed in motor car, has buffer unit in which playback velocity of audio and video is reduced in relation to normal velocity, until preset quantity of audio and video is stored in buffer unit Download PDFInfo
- Publication number
- DE102010011098A1 DE102010011098A1 DE201010011098 DE102010011098A DE102010011098A1 DE 102010011098 A1 DE102010011098 A1 DE 102010011098A1 DE 201010011098 DE201010011098 DE 201010011098 DE 102010011098 A DE102010011098 A DE 102010011098A DE 102010011098 A1 DE102010011098 A1 DE 102010011098A1
- Authority
- DE
- Germany
- Prior art keywords
- audio
- video data
- video
- buffer unit
- velocity
- 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- Withdrawn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
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- 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
- H04N21/41422—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance located in transportation means, e.g. personal vehicle
-
- 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
- H04N21/4383—Accessing a communication channel
- H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
-
- 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
- H04N21/44004—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 video buffer management, e.g. video decoder buffer or video display buffer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0105—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level using a storage device with different write and read speed
Abstract
Description
Die vorliegende Erfindung betrifft eine Wiedergabevorrichtung zur Wiedergabe von Audio- und/oder Videodaten insbesondere in einem Kraftfahrzeug mit einer Puffereinrichtung zum vorübergehenden Speichern der wiederzugebenden Audio- und/oder Videodaten. Darüber hinaus betrifft die vorliegende Erfindung ein entsprechendes Verfahren zur Wiedergabe von Audio- und/oder Videodaten.The present invention relates to a reproduction device for reproducing audio and / or video data, in particular in a motor vehicle, having a buffer device for temporarily storing the audio and / or video data to be reproduced. Moreover, the present invention relates to a corresponding method for reproducing audio and / or video data.
Bei der Wiedergabe von Audio- und/oder Video-Strömen über das Internet (so genanntes Audio- bzw. Video-Streaming) ist in der Regel eine Pufferung der Audio- und/oder Videodaten notwendig, um Bandbreitenschwankungen auszugleichen und eine kontinuierliche und unterbrechungsfreie Wiedergabe zu ermöglichen. Dies ist insbesondere dann der Fall, wenn die Internet-Konnektivität über einen Mobilfunkkanal erfolgt (z. B. UMTS, GPRS), da hier Bandbreitenschwankungen und Funkunterbrechungen häufig vorkommen. Je mehr Daten gepuffert werden, umso mehr Schwankungen der Bandbreite können ausgeglichen werden. Zur Durchfahrt eines Tunnels mit schlechter Mobilfunkversorgung kann es beispielsweise vorteilhaft sein, über eine Minute des Audio-/Video-Stroms zu puffern.In the reproduction of audio and / or video streams over the Internet (so-called audio or video streaming) is usually a buffering of the audio and / or video data necessary to compensate for bandwidth fluctuations and a continuous and uninterrupted playback to enable. This is the case in particular when the Internet connectivity takes place via a mobile radio channel (eg UMTS, GPRS), since bandwidth fluctuations and radio interruptions frequently occur here. The more data that is buffered, the more variations in bandwidth can be compensated. For example, to transit a tunnel with poor cellular coverage, it may be advantageous to buffer over one minute of the audio / video stream.
Audio- bzw. Video-Ströme, welche nicht in Echtzeit übertragen werden müssen, können zum beschleunigten Auffüllen des Puffers die Datenrate kurzzeitig erhöhen. Dies ist bei Echtzeit-Datenströmen wie z. B. IP-Radio (Web-Radio) jedoch nicht möglich. Der Start der Wiedergabe einer solchen Quelle verzögert sich daher, bis der Puffer gefüllt ist. Bei IP-Radio-Diensten in Fahrzeugen sind dies mindestens mehrere Sekunden bis hin zu über einer Minute, wie oben beschrieben. Größere Puffer verlängern jedoch die Wartezeit beim Umschalten von IP-Radio-Stationen (Umschaltzeit). Bereits Umschaltzeiten von mehreren Sekunden sind für den Anwender unkomfortabel. Eine Umschaltzeit von einer Minute ist in der Regel untragbar.Audio or video streams that do not need to be transmitted in real time can increase the data rate for a faster filling of the buffer. This is true for real-time data streams such. However, IP radio (web radio) is not possible. The start of playback of such a source is therefore delayed until the buffer is filled. For IP radio services in vehicles, this is at least several seconds to over a minute, as described above. However, larger buffers increase the waiting time when switching IP radio stations (switching time). Already switching times of several seconds are uncomfortable for the user. A switching time of one minute is usually unsustainable.
Veranschaulicht wird dies nochmals in den
Bei IP-Radio besteht also ein Konflikt zwischen Robustheit (Schutz vor Ausfällen durch Bandbreitenschwankungen) und dem Komfort für einen Nutzer (schnelle Umschaltzeit).For IP radio, there is a conflict between robustness (protection against bandwidth fluctuations) and comfort for a user (fast switching time).
Die Aufgabe der vorliegenden Erfindung besteht somit darin, bei unvermindertem Schutz vor Ausfallen durch Bandbreitenschwankungen einen verbesserten Komfort für den Nutzer hinsichtlich schneller Umschaltzeiten zu erreichen.The object of the present invention is therefore to achieve an improved comfort for the user in terms of faster switching times with undiminished protection against failure by bandwidth fluctuations.
Erfindungsgemäß wird diese Aufgabe gelöst durch eine Wiedergabevorrichtung nach Anspruch 1. Darüber hinaus wird diese Aufgabe auch gelöst durch ein Verfahren nach Anspruch 5. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.According to the invention this object is achieved by a reproducing apparatus according to claim 1. In addition, this object is also achieved by a method according to claim 5. Advantageous developments of the invention will become apparent from the dependent claims.
Es ist also demnach eine Audio-/Video-Wiedergabevorrichtung, insbesondere für ein Kraftfahrzeug, vorgesehen, die eine Puffereinrichtung zum vorübergehenden Speichern von empfangenen Audio-/Video-Daten aufweist, die von Internet basierten Audio-/Video-Diensten erzielt werden. Erfindungsgemäß ist eine Änderungseinrichtung zum Ändern einer Geschwindigkeit einer Wiedergabe von vorübergehend gespeicherten Audio-/Video-Daten, zum Wiedergeben der vorübergehend gespeicherten Audio-/Video-Daten mit einer Geschwindigkeit, die gegenüber einer normalen Wiedergabegeschwindigkeit verringert ist, und zum Ändern der Geschwindigkeit zu der normalen Wiedergabegeschwindigkeit vorgesehen, wenn eine vorbestimmte Menge an Audio-/Video-Daten vorübergehend in der Puffereinrichtung gespeichert ist.Thus, it is therefore provided an audio / video reproducing apparatus, in particular for a motor vehicle, having a buffer means for temporarily storing received audio / video data obtained from Internet based audio / video services. According to the invention, changing means for changing a speed of reproduction of temporarily stored audio / video data, for reproducing the temporarily stored audio / video data at a speed reduced from a normal reproduction speed, and for changing the speed to the normal playback speed when a predetermined amount of audio / video data is temporarily stored in the buffer means.
Vorzugsweise ist weiterhin eine Anpasseinrichtung zum Anpassen einer Tonhöhe der mit der verringerten Geschwindigkeit wiedergegebenen Audio-/Video-Daten an eine Tonhöhe der mit der normalen Wiedergabegeschwindigkeit wiedergegebenen Audio-/Video-Daten vorgesehen. Des Werteren können ein Grad eines Verringerns der Geschwindigkeit und die vorbestimmte Menge der Audio-/Video-Daten von einem Nutzer einstellbar sein.Preferably, there is further provided an adjusting means for adjusting a pitch of the audio / video data reproduced at the reduced speed to a pitch of the audio / video data reproduced at the normal reproducing speed. More particularly, a degree of decreasing the speed and the predetermined amount of the audio / video data may be adjustable by a user.
Die vorliegende Erfindung wird anhand der beigefügten Zeichnungen naher erläutert, in denen zeigen:The present invention will be explained in more detail with reference to the accompanying drawings, in which:
Die nachfolgend näher geschilderten Ausführungsbeispiele stellen bevorzugte Ausführungsformen der vorliegenden Erfindung dar.The embodiments described in more detail below represent preferred embodiments of the present invention.
Mithilfe digitaler oder analoger Filter ist es möglich, eine Audio- oder Video-Wiedergabe so zu verlangsamen oder zu beschleunigen, dass sich die Tonhöhe der Wiedergabe nicht ändert. Für den Betrachter der Audio- oder Video-Signale ist eine leichte Beschleunigung oder Verlangsamung nicht direkt wahrnehmbar und bedeutet somit keinen Komfortverlust. Beispielsweise werden gelegentlich Kinofilme bei der Ausstrahlung im Fernsehen um ca. 4% beschleunigt, um den Unterschied zwischen den im Kino üblichen 24 Bildern/Sekunde und den im europäischen Fernsehen üblichen 25 Bildern/Sekunde auszugleichen.Using digital or analog filters, it is possible to slow down or speed up audio or video playback so that the pitch of the playback does not change. For the viewer of the audio or video signals, a slight acceleration or deceleration is not directly noticeable and thus does not compromise comfort. For example, occasionally movies are accelerated by about 4% when broadcast on television, to make up for the difference between the 24 frames per second usual in cinema and the 25 frames per second usual in European television.
Diese Möglichkeiten werden hier zur Auflösung des oben genannten Konflikts zwischen Robustheit und Komfort verwendet. Der Verlauf des Pufferfüllstands ist hierzu in
Sowohl das Maß der Verlangsamung als auch die Größe r des Puffers können vom Anwender verändert werden, um Robustheit und Komfort gemäß den Wünschen des Anwenders aufeinander abzustimmen.Both the rate of slowing down and the size r of the buffer can be changed by the user to match robustness and comfort according to the user's wishes.
Die beschriebene Erfindung kann rein in Software mit geringem Mehraufwand realisiert werden und hat daher das Potential, mit nur geringen Mehrkosten einen großen Komfortgewinn für den Nutzer zu erzielen. Insbesondere für zukünftige Head-Units mit hohem Internet-Anteil sind große Vorteile zu erwarten, denn durch die verlangsamte Wiedergabe bereits vor kompletter Auffüllung des Pufferspeichers können Umschaltzeiten zwischen verschiedenen Radio-Stationen erreicht werden, die deutlich unter den 5 bis 10 Sekunden liegen, die üblicherweise für das komplette Füllen eines Pufferspeichers notwendig sind.
- f
- Füllstand
- r
- Puffer-Reserve
- t
- Zeit
- t0
- Zeitpunkt
- t1
- Zeitpunkt
- t2
- Zeitpunkt
- t3
- Zeitpunkt
- t4
- Zeitpunkt
- f
- level
- r
- Buffer Reserve
- t
- Time
- t 0
- time
- t 1
- time
- t 2
- time
- t 3
- time
- t 4
- time
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010011098 DE102010011098A1 (en) | 2010-03-11 | 2010-03-11 | Audio and video data playback device installed in motor car, has buffer unit in which playback velocity of audio and video is reduced in relation to normal velocity, until preset quantity of audio and video is stored in buffer unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010011098 DE102010011098A1 (en) | 2010-03-11 | 2010-03-11 | Audio and video data playback device installed in motor car, has buffer unit in which playback velocity of audio and video is reduced in relation to normal velocity, until preset quantity of audio and video is stored in buffer unit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010011098A1 true DE102010011098A1 (en) | 2011-11-17 |
Family
ID=44859472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201010011098 Withdrawn DE102010011098A1 (en) | 2010-03-11 | 2010-03-11 | Audio and video data playback device installed in motor car, has buffer unit in which playback velocity of audio and video is reduced in relation to normal velocity, until preset quantity of audio and video is stored in buffer unit |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102010011098A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012215352A1 (en) * | 2012-08-29 | 2014-05-28 | Continental Automotive Gmbh | Play media at reduced speed |
WO2016091423A1 (en) * | 2014-12-08 | 2016-06-16 | Robert Bosch Gmbh | Method for playing back a media stream |
CN105872668A (en) * | 2016-03-31 | 2016-08-17 | 百度在线网络技术(北京)有限公司 | Audio-video data processing method and device as well as vehicle-mounted terminal |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5822537A (en) * | 1994-02-24 | 1998-10-13 | At&T Corp. | Multimedia networked system detecting congestion by monitoring buffers' threshold and compensating by reducing video transmittal rate then reducing audio playback rate |
US6301258B1 (en) * | 1997-12-04 | 2001-10-09 | At&T Corp. | Low-latency buffering for packet telephony |
US20040228351A1 (en) * | 1993-06-09 | 2004-11-18 | Andreas Richter | Method and apparatus for multiple media digital communication system |
WO2008084179A1 (en) * | 2007-01-08 | 2008-07-17 | Nds Limited | Buffer management |
EP2180708A1 (en) * | 2008-10-22 | 2010-04-28 | TeliaSonera AB | Method for streaming media playback and terminal device |
-
2010
- 2010-03-11 DE DE201010011098 patent/DE102010011098A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040228351A1 (en) * | 1993-06-09 | 2004-11-18 | Andreas Richter | Method and apparatus for multiple media digital communication system |
US5822537A (en) * | 1994-02-24 | 1998-10-13 | At&T Corp. | Multimedia networked system detecting congestion by monitoring buffers' threshold and compensating by reducing video transmittal rate then reducing audio playback rate |
US6301258B1 (en) * | 1997-12-04 | 2001-10-09 | At&T Corp. | Low-latency buffering for packet telephony |
WO2008084179A1 (en) * | 2007-01-08 | 2008-07-17 | Nds Limited | Buffer management |
EP2180708A1 (en) * | 2008-10-22 | 2010-04-28 | TeliaSonera AB | Method for streaming media playback and terminal device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012215352A1 (en) * | 2012-08-29 | 2014-05-28 | Continental Automotive Gmbh | Play media at reduced speed |
EP2891258A1 (en) * | 2012-08-29 | 2015-07-08 | Continental Automotive GmbH | Playback of media data at reduced speed |
US9781454B2 (en) | 2012-08-29 | 2017-10-03 | Continental Automotive Gmbh | Playback of media data at reduced speed |
WO2016091423A1 (en) * | 2014-12-08 | 2016-06-16 | Robert Bosch Gmbh | Method for playing back a media stream |
CN107005725A (en) * | 2014-12-08 | 2017-08-01 | 罗伯特·博世有限公司 | Method for reappearing Media Stream |
CN105872668A (en) * | 2016-03-31 | 2016-08-17 | 百度在线网络技术(北京)有限公司 | Audio-video data processing method and device as well as vehicle-mounted terminal |
WO2017166587A1 (en) * | 2016-03-31 | 2017-10-05 | 百度在线网络技术(北京)有限公司 | Method and device for audio/video data processing and vehicle-mounted terminal |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69836416T2 (en) | DEVICE AND METHOD FOR CODING AND DISCONNECTING DIGITAL VIDEO DATA STREAMS | |
DE102010029030A1 (en) | Method and device for processing data in a vehicle | |
DE102007031465A1 (en) | System and method for transmitting audio data | |
DE19860507A1 (en) | Video coding method, video decoder and digital television system using such a method and such a decoder | |
DE19813784A1 (en) | Method for increasing the storage capacity for service information in a receiver for digital TV programs | |
DE102010011098A1 (en) | Audio and video data playback device installed in motor car, has buffer unit in which playback velocity of audio and video is reduced in relation to normal velocity, until preset quantity of audio and video is stored in buffer unit | |
DE102009050312B4 (en) | Digital broadcasting | |
DE3409212A1 (en) | COLOR TELEVISION TRANSMISSION OR -INFORMATION STORAGE SYSTEM WITH TIME MULTIPLEX CODING AND SUITABLE INFORMATION GIVER AND RECEIVER | |
EP2127382B1 (en) | Method and system for switching between programme channels without interference in a video environment | |
DE102013006125A1 (en) | Car with a receiving device for radio and / or video signals | |
EP2891258A1 (en) | Playback of media data at reduced speed | |
DE112011101955B4 (en) | Video display device | |
EP2206311B1 (en) | Method and system for the bandwidth-optimized transmission of hdtv data streams via an ip-based distributor network | |
DE102013219140B4 (en) | Packet sending and receiving device and descrambling system | |
DE19903266B4 (en) | Local network in a vehicle | |
EP2177032A1 (en) | Method and system for reducing the switching gap during a program change in a digital video environment | |
DE19813551C2 (en) | Method for the transmission of time-critical data packets in digital wireless transmission systems | |
DE102017214237A1 (en) | Media playback device for playing back content-like media signals | |
WO2013117514A1 (en) | Method for quickly switching between alternative transmission paths | |
DE102016201680A1 (en) | Method and system for synchronously playing audio signals and video signals | |
DE19940928B4 (en) | Device and method for receiving and processing a packet of compressed data | |
DE102008061712A1 (en) | Method for transmission of data in vehicle i.e. motor vehicle, involves logically separating audio signals from control information and video signal, where separated audio signals are transmitted with bit samples via digital interface | |
DE102018108784A1 (en) | A method of transmitting a digital video signal to a receiving device, processing unit and computer program product | |
WO2016091423A1 (en) | Method for playing back a media stream | |
DE19623934A1 (en) | Digital data reception system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R005 | Application deemed withdrawn due to failure to request examination |