Abstract:
Remote edition between video devices interconnected through a communication network is carried out without causing any time lag between the transmitted audio and video signals and the time code data. An editor (18) outputs a time code sensing command to a terminal (12), and the terminal (12) multiplexes the time code sensing command into a transmission packet and sends the packet to another terminal (42) through a communication network (30). The terminal (42) receives the packet and sends the time code sensing command to another VTR (46). The VTR (46) outputs the audio and video data and time code data to the terminal (42) in accordance with control data. The terminal (42) multiplexes the audio and video data and the time code data inputted from the VTR (46) into a transmission packet and transmits the packet to an editing system (10).
Abstract:
A system stores data on a plurality of parallel magnetic tape tracks. Error protection is based on a frame-wise product code that has first code words defined in a single track and second code words defined in a recurrent cycle around all tracks. In a read mode the system drives the tape in a first closed servo loop while synchronizing by the data handling, and in a write mode in a second closed loop under control of motor feedback. The tape driver has a bidirectional buffer for framewise buffering data between the tape and an application, whilst interchangeably presenting either an amble frame or a data frame to the tape. The system allows an application to handle data framewise bidirectionally viz à viz the tape driver. Extra error protection is gained by a Reed-Solomon code operating on a uniform symbol series across a plurality of successive frames without reference to amble frames, and assigns all redundant symbols produced thereby on exclusive-redundancy frames.
Abstract:
A method of adding time information to a data stream is provided. First and second timing sequences are linked with the data stream. The first timing sequence provides a permanent time record of when the data in the stream first originated. The second timing sequence is re-writable when the data stream is altered, for example by editing, so as to ensure an internally consistent time track is provided each time the data stream is changed. The timing sequences are derived from absolute references such as Global Positioning System (GPS) Time. The first and second timing sequences may be stored separately to the data stream. Two or more sets of second timing sequences may be provided, corresponding to different presentations of common sets of data streams.
Abstract:
An audio/video production system (16) is implemented on a PC-based platform, preferably utilizing various forms of removable magnetic, optical, or magneto-optical storage media (70). Specially modified cameras or other sources provide digitally data-compressed audio and video programm materials in two formats, a first format having a higher data-compression ratio and intended for use in off-line systems to develop edit decision lists, and a second format having a lower data-compression ratio and intended for use in on-line editing and to produce the final representations of the programs. Off-line editing decisions may thus be developed on a PC (102) using removable storage media (104), and final representations of the programs may be produced on-line in accordance with stationary-head or rotary-head digital-tape-based formats, such as DAT, 6-mm or 8-mm tapes. In an alternative embodiment, automatic and unattended editing, or extended program playback of more than 40 hours duration of digital video, is available.
Abstract:
A multitrack recording arrangement is disclosed capable of recording n information signals in a plurality of tracks. The information signals are recorded in tape frames, such that one information signal is recorded in each n-th tape frame. Further, a multitrack reproducing arrangement is disclosed for reproducing the information signals from the record carrier obtained by the recording arrangement.
Abstract:
Digital home audiovisual information recording and playback apparatus comprising a microprocessor associated, through a digital interface, with display means, through another interface with sound playback means and through a telecommunications interface with means for loadind audio selection or visual selection digital information. The invention is characterized by control means (1021 to 1025) for controlling display means, enabling an operating mode to be selected from a menu of three modes, in which the device either plays back information stored in its mass memory, records new digitalized information in its mass memory or combines analog information from a microphone with digitalized information received from the mass memory.
Abstract:
Payment-based audiovisual playback system characterized by comprising a microprocessor device associated with a payment device primarily including means for storing, inter alia, in digital format the visual and sound information to be used. The system is associated through interfaces with display means and sound playback means for providing a multimedia environment. The system is controlled by a multitask operating system including a tool and service library integrated into the storage means. The system, which is also associated through an interface with a telecommunications modem, is optionally connected to an audiovisual data distribution network by a telecommunications modem and telecommunications links, said telecommunications function also being controlled by said multitask operating system.
Abstract:
The invention relates to a combination of a recording arrangement (1) and a source selection arrangement (3). The recording arrangement comprises analog (4) and digital (5) electrical inputs. An A/D-converter (7) is provided for converting analog signals applied to the analog input (4) into digital signals. Recording means (8) are provided for recording the digital signals onto a record carrier (2). Also switching means (10) are provided for coupling the analog electrical input or the digital electrical input to the input (9) of the recording means, under the influence of a first control signal. The source selection arrangement (3) comprises source selection means (13) for selecting between a first audio signal source (Compact Disc digital audio player, CD), a second audio signal source (TUNER), and at least one auxiliary audio signal source (AUX 1). The source selection arrangement is provided with analog (17) and digital (18) electrical outputs. The analog electrical output (17) of the source selection arrangement is coupled to the analog electrical input (4) of the recording means, while the digital electrical output (18) is coupled to the digital electrical input (5). The combination further comprises user actuable input means (26) coupled to selection signal generator means (28), being adapted to generate a selection signal at an output (30) in response to user actuation. The selection signal generator means (28) also comprises memory means (36) having a control signal input (38) coupled to the input means (26), the memory means being adapted to store information (I, I) relating to the source selected by the user and indicating to which input of the analog or the digital electrical input of the recording arrangement the signal supplied by the selected source is applied.
Abstract:
A method and device for correcting errors in digital data suitable for high-density recording to a Hi-Vision VTR, etc. A block external-code ECC circuit (4A) adds more than 1/N of external codes of every block to digital data, for example, a video signal to be recorded when the number of tracks per field is N, and a block internal-code decoding circuit (14A) adds internal codes to the video signal in the form of codes representing the products of the external codes by the internal codes, thus generating error-correcting codes structured doubly. The external codes in these error-correcting codes are recorded distributedly on N tracks for one field on a video tape (1).
Abstract:
A digital image processing system including a microprocessor (34), random access memory (36), storage memory (38), input means (44 and/or 46), display means (42), and suitable logic (40) to provide existing digital image processing operations in a conventional graphical user interface, such as a windows environment, which allows the user to implement image processing operations on a selected portion of a movie without using a primitive special programming language.