70results about "Helical scan format" patented technology

A near video-on-demand (VOD) service enabled using a digital video recorder (DVR) for the simultaneous storage and playback of multimedia data. A DVR is connected over a network to a multimedia network source. A VOD selection is requested by the DVR from the network source. A multimedia data signal is received by the DVR from the network source. The data signal contains the requested VOD selection. A first received portion of the received data signal is stored on the DVR. The first received segment is played by the DVR for display on a display device. Simultaneously during the playing of the first received segment, a second received segment of the received data signal is received from the network source and stored on the DVR while the first received segment is played the display device. Thus, the requested VOD selection begins playing on the display device prior to the reception of the entire compressed multimedia data signal so that a requested VOD selection can begin being displayed nearly instantaneously after the request for it is made. A video-on-request (VOR) service is also enabled using a DVR. VOR selection data is received by a centralized database device, such as a network server, from a plurality of users. Each VOR selection data includes at least one requested video selection and video recorder identifying information for identifying each particular video recorder. A transmission priority of requested video selections is determined dependent on the frequency of requests received from the plurality of users. A transmission channel and time is determined based on the transmission priority. DVR control signals are transmitted to automatically tune in the determined transmission channel at the determined transmission time and record the particular video selection.

A video recording and playback device (10) incorporates a processor (114) for processing the video signal to detect the presence of commercial messages. Video and audio event detectors (102, 104) detect the presence of events in the signal as it is recorded. The timing relationship of the detected events is analyzed to classify the video segments between events as program material or as commercial messages. After a program is recorded, control marks are generated (132) to indicate the beginning and end of commercial groups so that they will be skipped during subsequent replay of the recorded program.

A near video-on-demand (VOD) service enabled using a digital video recorder (DVR) for the simultaneous storage and playback of multimedia data. A DVR is connected over a network to a multimedia network source. A VOD selection is requested by the DVR from the network source. A multimedia data signal is received by the DVR from the network source. The data signal contains the requested VOD selection. A first received portion of the received data signal is stored on the DVR. The first received segment is played by the DVR for display on a display device. Simultaneously during the playing of the first received segment, a second received segment of the received data signal is received from the network source and stored on the DVR while the first received segment is played the display device. Thus, the requested VOD selection begins playing on the display device prior to the reception of the entire compressed multimedia data signal so that a requested VOD selection can begin being displayed nearly instantaneously after the request for it is made. A video-on-request (VOR) service is also enabled using a DVR. VOR selection data is received by a centralized database device, such as a network server, from a plurality of users. Each VOR selection data includes at least one requested video selection and video recorder identifying information for identifying each particular video recorder. A transmission priority of requested video selections is determined dependent on the frequency of requests 1received from the plurality of users. A transmission channel and time is determined based on the transmission priority. DVR control signals are transmitted to automatically tune in the determined transmission channel at the determined transmission time and record the particular video selection.

A set of interfaces, data structures and events represent a DV metadata extraction tool. The DV metadata extraction tool includes an API (application programming interface) for describing DV metadata packs that are to be extracted from a DV data stream. The extraction API supports methods for specifying and removing DV metadata packs to be extracted from DV frames. The DV metadata extraction tool also includes an API for describing a container that holds DV metadata once it has been extracted from a DV frame. The container API supports methods for adding and removing DV structures to the container and for retrieving data from the container, removing data from the container, and iterating through the container. The DV metadata extraction tool also includes a collection of higher-level structures that represent unpacked DV metadata packs.

In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.

An apparatus for providing voice titles for recorded programs includes a recorder (11,19) for recording on a sequential recording medium, which has an audio recording portion (242) and a control recording portion (246). A control input (222) is provided for indicating a start of a voice title and the start indicator (252) is recorded on the control recording portion of the sequential medium. A microphone (264) or other device is provided for entering a voice title and for recording the entered voice title onto the audio recording portion of the sequential medium sequentially following the recorded indication of the start of the voice title in the control recording portion. A control input (222) is provided for indicating an end of the voice title and the end indicator (254) is recorded onto the control recording portion of the sequential medium sequentially following the recorded voice title in the audio recording portion. The apparatus includes an analog to digital converter (270) for digitizing the entered voice title and a memory (33) for storing the digitized voice title. Another embodiment of the apparatus includes a voice synthesizer (260) for synthesizing a voice from the stored digitized voice title.

A picture signal recording / reproducing apparatus is disclosed in which a CPU 11 records the identification information for discriminating the video cassette during picture recording on a magnetic tape, while recording the recording information indicating the recording contents, such as the still picture data for program scenes, in memories 13 and 14 in association with the identification information. During reproduction, the CPU 11 reads out still picture data of each program from the memories 13 and 14, while a digital signal processing circuit 15 converts the still picture data of each program as a multi-picture into analog signals which are outputted to a TV receiver via an analog signal processing circuit 23 and an output terminal 33. The result is that the scenes of plural programs recorded in each of plural video cassettes are displayed on the TV receiver. This permits the user to easily recognize the program recorded on the video cassettes and to reproduce the desired program or to record a program in an optimum video cassette.

Data storage apparatus is provided for storing data on a tape in accordance with a format specifying a plurality of logs of tape-usage information and a data area for storing the data. Control means are programmed to update one of the logs for each usage of the tape, the logs being selected in turn for updating.

An apparatus and method for recording a moving picture is disclosed, whereby the moving picture captured by the apparatus is converted into a file and stored in a memory. The method for recording a moving picture includes capturing moving pictures to generate at least one moving-picture file, selecting the moving-picture files included in a interval among the generated moving-picture files, combining the selected moving-picture files, and storing the combined moving-picture files.