DE19848194A1 - Acquisition and selective reproduction device for video data, analyses and classifies compressed data in real time, and reproduces data based on class to filter out or replace certain classes - Google Patents

Acquisition and selective reproduction device for video data, analyses and classifies compressed data in real time, and reproduces data based on class to filter out or replace certain classes

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Publication number
DE19848194A1
DE19848194A1 DE19848194A DE19848194A DE19848194A1 DE 19848194 A1 DE19848194 A1 DE 19848194A1 DE 19848194 A DE19848194 A DE 19848194A DE 19848194 A DE19848194 A DE 19848194A DE 19848194 A1 DE19848194 A1 DE 19848194A1
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Germany
Prior art keywords
video
data
image
real time
compressed
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DE19848194A
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German (de)
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Stefan Scherbarth
Cornelia Scherbarth
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Individual
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Classifications

    • 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
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/37—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying segments of broadcast information, e.g. scenes or extracting programme ID
    • H04H60/375—Commercial
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/61—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54
    • H04H60/65—Arrangements for services using the result of monitoring, identification or recognition covered by groups H04H60/29-H04H60/54 for using the result on users' side
    • 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
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • 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
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4333—Processing operations in response to a pause request
    • 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
    • H04N21/44008—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 operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • 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
    • H04N21/44016—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 splicing one content stream with another content stream, e.g. for substituting a video clip
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/454—Content or additional data filtering, e.g. blocking advertisements
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/812—Monomedia components thereof involving advertisement data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction

Abstract

The arrangement compresses the digitized video data in real time and stores the compressed data in a digital random access memory. A video and audio data stream is received and stored, and can be read from memory simultaneously with a freely selected time offset. The compressed data are analysed and video sequences are classified. The data are reproduced using the classification results so that certain classes of information, such as advertisements, can be filtered out or replaced.

Description

Die Erfindung betrifft ein Gerät zur Aufnahme und selektiven Wiedergabe von Videodaten bestehend aus Bild und Tonsignalen zum Beispiel als Zusatzgerät zu einem Fernsehempfänger.The invention relates to a device for recording and selective reproduction of video data consisting of image and sound signals, for example as an additional device for a television receiver.

Beim Betrachten von Fernsehsendungen wird das Programm häufig durch Einblendung von Werbesendungen unterbrochen. Um das Betrachten dieser Werbeunterbrechungen zu vermeiden hat der Zuschauer z. B. die Möglichkeit während einer Werbesendung Lautstärke und Helligkeit zu reduzieren bzw. den Fernseher auszuschalten oder auf ein anderes aktuelles oder gespeichertes Programm umzuschalten. Diese Aktionen können manuell oder auch selbsttätig an Hand einer automatischen Erkennung der Werbesendung mittels verschiedener Methoden wie z. B. Erkennung spezifischen Einzelbildern oder komplexe Analyse der Signaturen z. B. mittels Fuzzylogik (US-Pat. Nr. 5 812 732), neuronaler Netze (US-Pat. Nr. 5 343 251) oder einem anderen dem Stand der Signal- und Bildverarbeitung entsprechendem Verfahren erfolgen.When watching TV programs, the program is often displayed by Commercials interrupted. To look at these commercial breaks the viewer has to avoid. B. the possibility during a commercial volume and reduce brightness or switch off the television or switch to another current one or to switch the saved program. These actions can be done manually or also automatically on the basis of an automatic recognition of the advertisement by means of various Methods such as B. Detection of specific single images or complex analysis of the Signatures e.g. Using fuzzy logic (U.S. Pat. No. 5,812,732), neural networks (U.S. Pat. No. 5 343 251) or another corresponding to the state of signal and image processing Procedure.

Hierbei entsteht jedoch in jedem Fall der Nachteil, daß auf Grund der unbekannten und auch unterschiedlichen Länge der Werbeunterbrechungen der Zuschauer jederzeit mit dem Ende der Werbeunterbrechung rechnen muß und somit, wenn er die unterbrochene Sendung ohne Lücke betrachten möchte, die Unterbrechungszeit kaum sinnvoll nutzen kann. Dies führt zusammen mit der üblichen, bewußten Plazierung der Werbeunterbrechungen an besonders spannenden oder interessanten Stellen eines Programms dazu, daß der Zuschauer in der Regel die Werbung betrachtet um auf das Ende der Unterbrechung zu warten.However, this creates the disadvantage in any case that due to the unknown and different length of advertising breaks of viewers at any time with the end of the Commercial interruption must count and therefore if he has the interrupted program without Wants to look at the gap that can hardly use the interruption time. this leads to along with the usual, deliberate placement of commercial breaks at particular exciting or interesting parts of a program that the viewer usually looks at the advertisement to wait for the end of the interruption.

Eine automatische Steuerung der Ausblendung von Werbeunterbrechungen, ändert hieran nichts und bewirkt nur den geringen Komfortgewinn, daß der Zuschauer nicht mehr selbst aktiv umschalten muß. Automatic control of hiding advertising breaks changes here nothing and only causes the slight gain in comfort that the viewer no longer himself must actively switch.  

Weiterhin wird eine automatische Erkennung von Werbung im Allgemeinen zur Erkennung eine gewisse, mit den Anforderungen an die Erkennungssicherheit zunehmende Zeit benötigen.Furthermore, automatic recognition of advertising is generally used for recognition require a certain amount of time, which increases with the requirements for recognition security.

Dies führt dazu, daß die entsprechende Ausblendung und Wiedereinblendung zu spät erfolgt und der Nutzer das gewünschte Programm nicht lückenlos verfolgen kann. Weiterhin erfordert eine ausreichend zuverlässige automatische Erkennung von Werbung nach dem Stand der Technik eine sehr aufwendige, fortlaufende Analyse einer sehr hohen Datenmenge (US Pat. Nr. 5 812 732, Nr. 5 343 251), sofern nicht lediglich einfache, von Sendeanstalten leicht eliminierbare Marker wie zum Beispiel Schwarzblenden (z. B. in US-Pat Nr. 5 748 263, US Pat. Nr. 5 692 093) detektiert werden.This leads to the corresponding fading out and fading in again too late and the user cannot completely follow the desired program. Still requires A sufficiently reliable automatic recognition of advertising according to the state of the art Technique a very complex, continuous analysis of a very large amount of data (US Pat. No. 5 812 732, No. 5 343 251), if not only simple, easy for broadcasters eliminable markers such as black blends (e.g., in U.S. Pat. No. 5,748,263, U.S. Pat. No. 5,692,093) can be detected.

Eine andere Methode den Werbebotschaften zu entgehen besteht darin das interessierende Programm mittels eines Videorecorders auf ein Magnetband aufzuzeichnen und dabei entweder bei Aufzeichnung oder bei Wiedergabe die Werbung durch Weglassen oder schnelles Vorspulen auszublenden. Die Steuerung des Videorecorders kann hierbei wiederum manuell oder, wie in zahlreichen Vorschlägen beschrieben (z. B. US-Pat. Nr. 5 696 866, 5 692 093, 5 708 477, 5 748 263), auch automatisch erfolgen. Der Komfortgewinn der automatischen Steuerung ist angesichts der einfachen manuellen Lösung durch schnelles Vorspulen während der Werbeeinblendung gering und wird auf Grund des bereits oben erwähnten hohen technischen Aufwandes teuer erkauft.Another method of escaping the advertising messages is the one that is of interest Record the program on a magnetic tape using a video recorder and either in the case of recording or playback, the advertising by omission or fast Hide fast-forward. The control of the video recorder can in turn be done manually or as described in numerous proposals (e.g. U.S. Pat. No. 5,696,866, 5,692,093, 5 708 477, 5 748 263), also take place automatically. The gain in comfort of the automatic Control is given the simple manual solution by fast forwarding during the advertising is low and is due to the high already mentioned technical expenses bought expensive.

Der wesentliche Nachteil ist in jedem Fall, daß eine Sendung erst nach erfolgter Aufzeichnung betrachtet werden kann. Dem weit überwiegenden Nutzerwunsch nach einer direkten, live Betrachtung des gesendeten Programms kann nicht entsprochen werden.The main disadvantage is in any case that a program only after recording can be viewed. The vast majority of user requests for direct, live Viewing of the broadcast program cannot be complied with.

Der Erfindung liegt die Aufgabe zugrunde eine Vorrichtung zu finden, welche es dem Nutzer erlaubt Sendungen live oder annähernd live mit der Ausstrahlung zu betrachten und hierbei eine automatische Ausblendung der Werbeunterbrechungen ermöglicht ohne daß der Nutzer jedoch in Bereitschaft auf das jeweilige Ende der Werbeeinblendung warten muß; weiterhin soll die Vorrichtung mit Einsatz preiswerter Hardware wie zum Beispiel Signalprozessoren oder µ-Prozessoren die Verwendung komplexer, den gesamten Bildinhalt über eine längere Zeit einbeziehender Klassifizierungsmethoden ermöglichen.The invention has for its object to find a device that the user allows broadcasts to be viewed live or approximately live with the broadcast and one automatic hiding of advertising interruptions without the user has to wait for the respective end of the advertisement; continue to Device using inexpensive hardware such as signal processors or  µ processors use complex, the entire image content over a long period of time enable inclusive classification methods.

Dies wird erfindungsgemäß dadurch gelöst, daß das empfangene Video- und Audiosignal digitalisiert wird, die digitalisierten Daten in Realzeit komprimiert werden und in einem digitalen Speichermedium mit wahlfreiem Zugriff wie zum Beispiel Halbleiterspeicher, magnetischer oder optischer Platte gespeichert werden, wobei gleichzeitig ein Video- und Audiodatenstrom aufgenommen und abgespeichert und mit frei wählbarem zeitlichem Versatz aus dem Speichermedium ausgelesen und ausgegeben wird. Weiterhin werden in einer Bild- und Signalverarbeitung fortlaufen die aufgenommenen Daten hinsichtlich geeigneter Merkmale analysiert die Videosequenzen und an Hand der erfaßten Merkmale inhaltlich klassifiziert. Hierbei werden zur Analyse der Videobilder die komprimierten Bilddaten verwendet werden und die Klassifizierung wird jeweils rückwirkend nach Detektion einer für eine zuverlässige Klassifikation ausreichenden Merkmalsanzahl und -verteilung vorgenommen.This is achieved according to the invention in that the received video and audio signal is digitized, the digitized data is compressed in real time and in one digital storage medium with random access such as semiconductor memory, magnetic or optical disk can be stored, with a video and Audio data stream recorded and saved and with a freely selectable time offset is read from the storage medium and output. Furthermore, in a picture and Signal processing continues the recorded data with regard to suitable features analyzes the video sequences and classifies their content based on the recorded characteristics. The compressed image data will be used to analyze the video images and the classification becomes retroactive after detection one for a reliable one Classification of sufficient number and distribution of characteristics.

Hierbei wird durch die Digitalisierung und Speicherung mittels eines Speichers mit wahlfreiem Zugriff erreicht, daß der Aufnahme und Wiedergabezeitpunkt zeitlich entkoppelt werden. Das heißt der Nutzer kann jederzeit währen einer live betrachteten Sendung die Wiedergabe unterbrechen und später an gleicher Stelle wiederaufnehmen. Hinsichtlich der Werbeunterbrechungen bedeutet dies, daß er nicht auf das Ende einer Unterbrechung warten muß, sondern irgendwann nach Ende der Unterbrechung die Betrachtung fortsetzen kann. Zur Reduktion der Datenmenge werden preiswerte, in Hardware realisierte Videocodecs zum Beispiel nach dem MJPEG, MPEG (Motion Picture Expert Group) oder einem Wavelet Verfahren eingesetzt. Wesentliches Merkmal dieser Kompressionsverfahren ist, daß die gesamte Bildinformation zunächst auf wesentliche, mit sehr geringen Datenmengen beschriebene Bildinhalte reduziert werden, welche dann entsprechend der zur Verfügung stehenden Bandbreite mit weiteren Daten detailliert werden. Im Falle des Waveletverfahrens wird zum Beispiel der Bildinhalt durch mehrfaches Tiefpaßfiltern und Unterabtasten auf einen Basisbildinhalt von ca. 1 kByte pro Bild reduziert, wobei gleichzeitig zahlreiche Parameter zur Beschreibung des Bildes wie Mittelwerte und Varianzen der Grundfarben ermittelt werden. Here, digitization and storage by means of a memory with random Access ensures that the recording and playback time are decoupled in time. The means the user can watch the broadcast at any time during a live program interrupt and resume later in the same place. With regard to the Commercial breaks means that he is not waiting for a break to end must, but can continue the observation at some point after the end of the interruption. In order to reduce the amount of data, inexpensive video codecs implemented in hardware are used Example according to the MJPEG, MPEG (Motion Picture Expert Group) or a wavelet Process used. An essential feature of this compression process is that the entire Image information initially on essential, described with very small amounts of data Image contents are reduced, which are then according to the available Bandwidth can be detailed with further data. In the case of the wavelet method, Example of the image content by multiple low-pass filters and subsampling on one Base picture content reduced by approx. 1 kByte per picture, whereby numerous parameters for Description of the image as to how mean values and variances of the primary colors are determined.  

Diese Kompressionsverfahren sind im allgemeinen sehr aufwendig und erfordern sofern sie als Softwarelösung in Echtzeit durchgeführt werden sollen sehr leistungsfähige und teure Prozessoren; daher wurden von verschiedenen Anbietern preiswerte Hardwarelösungen in Form einzelner Integrierter Bausteine (IC) entwickelt.These compression processes are generally very complex and, if they are required Software solution to be carried out in real time should be very powerful and expensive Processors; Therefore, inexpensive hardware solutions have been developed by various providers Form of individual integrated blocks (IC) developed.

Die erfindungsgemäße Verwendung der komprimierten Videodaten zur Extraktion von Merkmalen und inhaltlicher Klassifikation bietet nun den Vorteil, daß einerseits in diesen Da­ ten - entsprechend der Zielsetzung der Kompression - noch die wesentlichen Inhalte des Videos enthalten sind, jedoch andererseits nur noch eine geringe, auch von preiswerten Signalprozessoren zu bewältigende Datenmenge fortlaufend zu analysieren ist.The use according to the invention of the compressed video data for the extraction of Characteristics and content classification now offers the advantage that on the one hand in this Da according to the objective of compression - the essential content of the video are included, but on the other hand only a small one, also of inexpensive ones The amount of data to be handled by signal processors must be continuously analyzed.

Die Videokompression ist somit erfindungsgemäß ein integraler Bestandteil der Merkmalsextraktion und inhaltlichen Klassifizierung indem sie auf sehr preiswerte und effiziente Weise die erste wesentliche Reduktion der zu untersuchenden Datenmenge bewirkt.The video compression is thus an integral part of the invention Feature extraction and content classification by pointing to very inexpensive and efficient way the first significant reduction in the amount of data to be examined.

Die Erfindung wird in der Abb. 1 näher erläutert. Diese zeigt den prinzipiellen Aufbau der Vorrichtung. Das am Eingang anliegende Audio- und Videosignal wird digitalisiert, das Videosignal dann mittels eines Kompressionsbausteins komprimiert. Die digitalen Audiodaten sowie die komprimierten Videodaten werden in dem Prozessor klassifiziert und in den Speicher mit einer typischen Mindestkapazität von einigen Gigabyte geschrieben. Gleichzeitig werden die gemäß der Klassifikation und dem gewünschten Zeitversatz selektierten Daten dem Dekompressionsbaustein und der Analogwandlung zur Ausgabe bereitgestellt. Die zum Beispiel in Form einer üblichen Fernbedienung realisierten Benutzerschnittstelle dient zur Steuerung des Gerätes.The invention is explained in more detail in Fig. 1. This shows the basic structure of the device. The audio and video signal present at the input is digitized, the video signal is then compressed using a compression module. The digital audio data and the compressed video data are classified in the processor and written into the memory with a typical minimum capacity of a few gigabytes. At the same time, the data selected according to the classification and the desired time offset are made available to the decompression module and the analog conversion for output. The user interface, for example in the form of a conventional remote control, is used to control the device.

Dieser prinzipielle Aufbau kann mit verschieden üblichen preiswert erhältlichen integrierten Bausteinen realisiert werden. In der besonders vorteilhaft erachteten Variante mit einer Bildkompression nach dem Waveletverfahren gemäß Anspruch 2 kann als Videoencoder und -de­ coder z. B. der Baustein ADV601LC eingesetzt werden.This basic structure can be integrated with various customary inexpensive integrated Building blocks can be realized. In the particularly advantageous variant with a Image compression according to the wavelet method according to claim 2 can as a video encoder and -de coder z. B. the module ADV601LC can be used.

Claims (2)

1. Vorrichtung zur Aufnahme und Wiedergabe von Video- und Audioinformationen wobei diese digitalisiert werden, die digitalen Videodaten mit geeignetem Verfahren in Realzeit komprimiert werden und in einem digitalen Speichermedium mit wahlfreiem Zugriff gespeichert werden, dadurch gekennzeichnet, daß ein Video- und Audiodatenstrom aufgenommen und abgespeichert wird und dieser gleichzeitig mit frei wählbarem zeitlichem Versatz aus dem Speichermedium ausgelesen und ausgegeben wird, und daß eine Bild- und Signalverarbeitung fortlaufen die aufgenommenen Daten hinsichtlich geeigneter Merkmale analysiert und an Hand der erfaßten Merkmale Videosequenzen inhaltlich klassifiziert, wobei zur Analyse der Videobilder die komprimierten Bilddaten verwendet werden und die Klassifizierung jeweils rückwirkend nach Detektion einer für eine zuverlässige Klassifikation ausreichenden Merkmalsanzahl und -verteilung vorgenommen wird, und daß die Wiedergabe der gespeicherten Daten an Hand der Klassifikationsergebnisse so gesteuert wird, daß ausgewählte Klassen von Videoinformationen wie z. B. Werbung bei der Wiedergabe durch ersatzloses Überspringen, Darstellung mit reduzierter Bild- und Tondynamik oder Ersetzen durch anderes Videomaterial ausgeblendet werden.1. Device for recording and playing back video and audio information, where it is digitized, the digital video data is compressed in real time by a suitable method and is stored in a digital storage medium with random access, characterized in that a video and audio data stream is recorded and stored is and this is simultaneously read out and output from the storage medium with a freely selectable time offset, and that image and signal processing continuously analyze the recorded data with regard to suitable features and classify the content of video sequences based on the recorded features, the compressed image data being used to analyze the video images are used and the classification is carried out retrospectively after detection of a sufficient number and distribution of features for a reliable classification, and that the reproduction of the stored data using the classifi cation results is controlled so that selected classes of video information such. B. Advertising can be hidden during playback by skipping without replacement, display with reduced image and sound dynamics or replacement with other video material. 2. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß zur Videokompression ein Waveletverfahren eingesetzt wird und die Bildauswertung unabhängig von der zur Aufzeichnung verwendeten Kompression an Hand des tiefpaßgefilterten, in einem Waveletkompressionsverfahren ermittelten Basisbildes sowie der bei der Waveletkompression ermittelten Kennzahlen erfolgt.2. Device according to claim 1, characterized in that for video compression Wavelet method is used and the image evaluation independently of the Record used compression based on the low pass filter, in one Wavelet compression method determined base image as well as that in the case of wavelet compression key figures determined.
DE19848194A 1998-10-20 1998-10-20 Acquisition and selective reproduction device for video data, analyses and classifies compressed data in real time, and reproduces data based on class to filter out or replace certain classes Ceased DE19848194A1 (en)

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