GB2361093A - Digital video tape recording with metadata on slant tracks - Google Patents

Digital video tape recording with metadata on slant tracks Download PDF

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Publication number
GB2361093A
GB2361093A GB0008410A GB0008410A GB2361093A GB 2361093 A GB2361093 A GB 2361093A GB 0008410 A GB0008410 A GB 0008410A GB 0008410 A GB0008410 A GB 0008410A GB 2361093 A GB2361093 A GB 2361093A
Authority
GB
United Kingdom
Prior art keywords
metadata
audio
tape
video
independently
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Withdrawn
Application number
GB0008410A
Other versions
GB0008410D0 (en
Inventor
Morgan William Amos David
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Europe Ltd
Original Assignee
Sony United Kingdom Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony United Kingdom Ltd filed Critical Sony United Kingdom Ltd
Priority to GB0008410A priority Critical patent/GB2361093A/en
Publication of GB0008410D0 publication Critical patent/GB0008410D0/en
Priority to PCT/GB2001/001480 priority patent/WO2001076241A2/en
Priority to EP01917272A priority patent/EP1186166A1/en
Priority to AU44356/01A priority patent/AU4435601A/en
Priority to JP2001573786A priority patent/JP2003529887A/en
Publication of GB2361093A publication Critical patent/GB2361093A/en
Priority to US10/014,148 priority patent/US20020131763A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding
    • H04N19/25—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding with scene description coding, e.g. binary format for scenes [BIFS] compression
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/032—Electronic editing of digitised analogue information signals, e.g. audio or video signals on tapes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G11B27/3036—Time code signal
    • G11B27/3054—Vertical Interval Time code [VITC]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
    • G11B27/323—Time code signal, e.g. on a cue track as SMPTE- or EBU-time code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/9201—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/77—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera
    • H04N5/772—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television camera the recording apparatus and the television camera being placed in the same enclosure
    • 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
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H04N5/7824—Television signal recording using magnetic recording on tape with rotating magnetic heads
    • H04N5/7826—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape
    • H04N5/78263—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape for recording on tracks inclined relative to the direction of movement of the tape
    • H04N5/78266—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape for recording on tracks inclined relative to the direction of movement of the tape using more than one track for the recording of one television field or frame, i.e. segmented recording

Abstract

A tape medium has recorded thereon successive slant tracks, each comprising a number of sectors, in which, across a group of one or more slant tracks:<BR> ```at least one independently writeable sector stores primarily video material;<BR> ```at least one independently writeable sector stores primarily audio material; and at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other data relating to the material.

Description

1 DIGITAL VIDEO TAPE RECORDING This invention relates to digital video
tape recording.
Several formats of digital video tape have been proposed. The first commercially successful format was the so-called "D I" format, described in the book, 1ntroduction to the 42:2 Digital Video Tape Recorder", Gregory, Pentech Press, 1988. Since then there have been many other formats, either standardised or proprietary.
A feature that these formats have in common is the use of helical scanning. This is a well-established technique in which the tape medium is wrapped at least part of the i o way around a head drum. One or more rotating read/write heads, mounted on the head drum. sweep out successive slant tracks on the tape medium as the medium is progressed slowly past the head drum. Linear tracks may also be used to carry information such as linear time code, other control information, a cueing audio track and the like.
Each slant track is generally divided up into a number of regions or sectors.
Although the precise number and layout of these regions varies from format to format, there are generally one or more video sectors and one or more audio sectors on each slant track. These can store compressed or uncompressed video and audio data. In other systems, data representing each video frame or image, or a group of images, may be recorded onto a group of tracks.
An example of a tape format is shown schematically in Figure 1 of the accompanying drawings. On the tape 10 there are three linear tracks disposed towards the tape edges: a linear time code track 20, a control track 30 and a cue audio track 40. Each slant track 50 has a predetermined layout of data sectors: two video sectors 60, 70 and four audio sectors AL.A4, each separated by a small gap 80 in the head scanning direction. The audio sectors AL.A4 correspond to four audio recording tracks or channels.
Recently. interest has developed in ways of recording so-called metadata along with the audio and video material. Metadata is additional or accompanying data defining the audio/video material in some fashion, and can include data items such as material identifiers (e.g. the SMPTE Unique Material Identifier or.UMID), bibliographic data such as cast or staff lists, copyright information, equipment used and so on. Of course, if any such metadata is to be stored alongside the audio/video material on tape, some data capacity needs to be allocated for its storage.
2361093 2 One previously proposed solution is to store "small" metadata items using the 'user bits", that is a small amount of user-definable data within the vertical interval time code (VITC) or linear time code (LTC) areas of the tape. Typically the user bits provide only of the order of 4 bytes (32 bits) per frame, of which some capacity is taken up by existing schemes such as "good shot markers" (GSMs). As an SMPTE UMID occupies at least 32 bytes, and in some forms up to 64 bytes, this solution provides for only a limited storage of this data.
This invention provides a digital video tape recorder operable to record successive slant tracks, each comprising a number of sectors, on a tape medium, in which, across a lo group of one or more slant tracks:
at least one independently writeable sector stores primarily video material; at least one independently writeable sector stores primarily audio material; and at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other data relating to the material.
The invention recognises that previous attempts to store metadata along with the audio/video material on tape have either suffered from a very low capacity or a difficulty in modifying the metadata later. Modification of the metadata at a later stage is important because extra details may need to be added or some details (such as copyright ownership) may indeed change if the programme is sold or licensed to other parties.
The invention provides a dedicated sector or sectors - perhaps one or more per slant track or one or more in a group of slant tracks - to store metadata. This allows more flexibility in allocating data capacity to the metadata and also, because the sector is separate, the ability to read, write or modify the metadata sectors independently of the audio/video material.
It is considered counter-intuitive to add a further sector for the following reason. The sectors have a small gap 80 between them in the head scanning direction. The gap length corresponds to the distance moved by the heads during the time taken to switch the record current on or off, plus a margin of safety. This is important to allow independent later modification of the content of a sector without affecting the content of neighbouring or other sectors on the same slant track. The gaps 80 are kept to the minimum possible length to avoid wasting tape capacity wherever there is a gap, data cannot be stored. So, the addition of another sector for metadata means a loss of some data capacity for the helical scanning tracks. However, the invention involves the realisation that. this 3 perceived disadvantage actually leads to the advantageous ability to modify the metadata later independently of the audio/video content.
In preferred embodiments, each slant track recorded by the recorder comprises:
at least one independently writeable sector stores primarily video material; at least one independently writeable sector stores primarily audio material; and at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other data relating to the material.
In one embodiment, the independently writeable sector(s) storing metadata have a io predetermined data capacity per slant track. This has the advantage that the start and end positions of the metadata sector(s) can be predetermined, allowing location or modification of the metadata to be made in a straightforward manner.
In another embodiment, the recorder is operable to vary the extent of the metadata sector(s) in response to the amount of metadata associated with each time segment (e.g. a field or frame) of the video and/or audio material. This avoids wasting tape capacity on empty or poorly filled metadata sectors, and can be achieved by, for example, varying the degree of quantisation of the video data in a compressed system.
In order to facilitate the location by the recorder of the metadata sector(s), it is preferred that the recorder comprises means for recording control data onto the tape indicating the extent of the metadata sector(s) of at least each slant track carrying one or more metadata sectors. Preferably the control data is recorded at a position on the tape so that, in a normal replay direction, the control data relating to a slant track is recovered from the tape before the head traverses a metadata sector of that slant track. This allows the control data defining the position of the metadata sector(s) to be obtained before the head even reaches those sector(s).
Preferably the recorder is arranged to record four concurrent audio channels on the tape medium.
Further respective aspects and features of the invention are defined in the appended claims.
Embodiments of the invention will now be described with reference to the accompanying drawings, throughout which like parts are referred to by like references, and in which:
Figure 1 is a schematic diagram illustrating a previously proposed tape format; 4 Figure 2 is a schematic diagram schematically illustrating a tape format according to an embodiment of the invention; and Figure 3 schematically illustrates a tape recording/replay apparatus according to an embodiment of the invention.
Referring now to Figure 2, a tape medium 110 carries linear tracks 20, 30, 40 as before, along with successive slant tracks 150 having independently writeable sectors separated by gaps 80 in the head scanning direction.
In this example embodiment the sectors are as follows: a video sector 160 (optionally having header data 165 - see below), audio sectors ALA4 representing four io concurrent audio channels, a further video sector 170 and a metadata sector 180 storing at least the SMPTE UMID and other metadata such as production information, cast lists, copyright ownership, bibliographic data and the like.
The boundary between the sectors 170 and 180, that is to say (indirectly) their data capacities, can be predetermined for that tape format. However, in embodiments of the invention the boundary can be moveable in dependence on the amount of metadata to be stored, so that the available tape capacity is not wasted if the quantity of metadata is low.
In the case of a moveable boundary, data defining the boundary, or defining the size of some sectors so that the boundary position can be derived, could be stored in for example the metadata sector of a preceding track. Alternatively, it could be stored in the same track to which it refers, but further towards the start of the track in a head scanning direction. The header 165 could be used for this information in relation to the boundary between the sectors 170 and 180. In either of these example cases, in a normal replay direction the head traverses the relevant area defining the boundary position before it reaches the boundary itself. This allows the metadata sector to be located and, if desired, modified independently of the video and audio sectors.
Figure 3) schematically illustrates a tape recording/replay apparatus operable to write, read and/or edit tapes recorded to the tape format shown in Figure 2.
The apparatus of Figure 3 comprises a metadata buffer, an audio/video buffer 2 10, a control circuit 220, a compression/decompression device 230, a multiplexer 240, a tape recording/replay arrangement having a recording/replay head set 250 and a tape medium 260, and a metadata editor 270.
Recording onto Tape Audio/video material is received and buffered in the AJV buffer 2 10, and metadata associated with the A/V material is buffered in the metadata buffer. The control circuit 220 detects the quantity of metadata - on a field-by-field basis, a frame- by-frame basis or as averaged over a particular number of fields or frames. In response to this detection, the control circuit controls the compression ratio or a compression parameter such as quantisation of the compression/decompression device 230 to compress the A1V data so as to allow space for the metadata. A lower limit on the amount of A/V data to be recorded can be set, in order to maintain quality. An example of a system in which the degree of compression is varied in response to the amount of metadata is given in GB9927111.6, a copy of which is placed on the file of the present application as a background document.
The metadata and compressed A/V data are passed to the multiplexer/demultiplexer 240 to be formatted into a data stream for recording on respective sectors of the tape medium 260. The control circuit 220 also controls the tape recording arrangement so that sector gaps 80 occur at the correct positions to record the respective amounts of metadata and A/V data.
Replay from Tape Data replayed form the tape is passed to the multiplexer/demultiplexer 240 which separates metadata from A/V data. If control data defining the boundary between metadata and other sectors is recorded elsewhere (e.g. in the header 165) this can be separated off and passed to the control circuit 220. Otherwise, the control circuit could recover this information from the metadata sector of a preceding track, or wherever it had been stored.
The metadata is output via the metadata buffer. The A/V data is decompressed by the compression/decompression device and output via the A/V buffer.
Editing Metadata If it is desired to edit only the metadata, then the metadata can be read from the tape, passed to a metadata editor (e.g. a computer terminal or apparatus running appropriate editing software) and then re-recorded back onto the tape as described above.
If a variable boundary arrangement is not used, so that the metadata sector has a fixed size and boundaries, then the arrangement of Figure 3 may be simplified in that the control circuit does not need to control the degree of compression of the compression/decompression device.
Of course, it is not necessary to have one metadata sector per track. Other embodiments could use more than one, or perhaps metadata sector(s) on only some tracks, for example in a repetitive fashion across a group of tracks.
6

Claims (18)

1. A digital video tape recorder operable to record successive slant tracks, each comprising a number of sectors, on a tape medium, in which, across a group of one or more slant tracks: at least one independently writeable sector stores primarily video material; at least one independently writeable sector stores primarily audio material; and at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other io data relating to the material.
2. A recorder according to claim 1, in which each slant track recorded by the recorder comprises: at least one independently writeable sector stores primarily video material; at least one independently writeable sector stores primarily audio material; and at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other data relating to the material.
3. A recorder according to claim 1 or claim 2, in which the independently writeable sector(s) storing metadata have a predetermined data capacity per slant track.
4. A recorder according to claim 1 or claim 2, in which the recorder is operable to vary the extent of the metadata sector(s) in response to the amount of metadata associated with each time segment of the video and/or audio material.
5. A recorder according to claim 4, comprising means for recording control data onto the tape indicating the extent of the metadata sector(s) of at least each slant track carrying one or more metadata sectors.
6. A recorder according to claim 5, in which the control data is recorded at a position on the tape so that, in a normal replay direction, the control data relating to a slant track is recovered from the tape before the head traverses a metadata sector of that slant track.
7 7. A recorder according to any one of the preceding claims, the recorder being arranged to record four concurrent audio channels on the tape medium.
8. A tape format of successive slant tracks, each comprising a number of sectors, in which, across a group of one or more slant tracks: at least one independently writeable sector stores primarily video material; at least one independently writeable sector stores primarily audio material; and at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other data 10 relating to the material.
9. A tape medium having recorded thereon successive slant tracks, each comprising a number of sectors, in which, across a group of one or more slant tracks: at least one independently writeable sector stores primarily video material; at least one independently writeable sector stores primarily audio material; and at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other data relating to the material.
10. An editing apparatus for use with a tape medium according to claim 9, the apparatus comprising means for reading, modifing and rewriting metadata stored in the metadata sector(s) of the slant tracks independently of the audio and video material stored in the audio and video sectors of the slant tracks.
11. A method of recording video material, audio material and associated metadata onto a tape medium, the method comprising the step of recording successive slant tracks, each comprising a number of sectors, in which, across a group of one or more slant tracks: at least one independently writeable sector stores primarily video material; at least one independently writeable sector stores primarily audio material; and 10 at least one independently writeable sector stores metadata associated with the audio and/or video material, the metadata including at least a material identifier and other data relating to the material.
8
12. A method of editing a tape medium according to claim 9, the method comprising the steps of reading, modifying and rewriting metadata stored in the metadata sector(s) of the slant tracks independently of the audio and video material stored in the audio and video sectors of the slant tracks.
1 '). A tape recorder substantially as hereinbefore described with reference to the accompanying drawings.
A tape format substantially as hereinbefore described with reference to the accompanying drawings.
15. A tape medium substantially as hereinbefore described with reference to the accompanying drawings.
16. A recording method substantially as hereinbefore described with reference to the accompanying drawings.
Z:1
17. Editing apparatus substantially as hereinbefore described with reference to the accompanying drawings.
18. An editing method substantially as hereinbefore described with reference to the accompanying drawings.
GB0008410A 2000-04-05 2000-04-05 Digital video tape recording with metadata on slant tracks Withdrawn GB2361093A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB0008410A GB2361093A (en) 2000-04-05 2000-04-05 Digital video tape recording with metadata on slant tracks
PCT/GB2001/001480 WO2001076241A2 (en) 2000-04-05 2001-03-30 Video processing and/or recording
EP01917272A EP1186166A1 (en) 2000-04-05 2001-03-30 Video processing and/or recording
AU44356/01A AU4435601A (en) 2000-04-05 2001-03-30 Video processing and/or recording
JP2001573786A JP2003529887A (en) 2000-04-05 2001-03-30 Video processing and / or recording device
US10/014,148 US20020131763A1 (en) 2000-04-05 2001-12-04 Video processing and/or recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0008410A GB2361093A (en) 2000-04-05 2000-04-05 Digital video tape recording with metadata on slant tracks

Publications (2)

Publication Number Publication Date
GB0008410D0 GB0008410D0 (en) 2000-05-24
GB2361093A true GB2361093A (en) 2001-10-10

Family

ID=9889293

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GB0008410A Withdrawn GB2361093A (en) 2000-04-05 2000-04-05 Digital video tape recording with metadata on slant tracks

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GB (1) GB2361093A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134130A (en) * 1976-07-30 1979-01-09 Sony Corporation Method and apparatus of inserting an address signal in a video signal
US4167759A (en) * 1976-07-31 1979-09-11 Sony Corporation Apparatus for inserting an address signal in a frame of the vertical blanking period of a television signal
US4587577A (en) * 1984-02-10 1986-05-06 Pioneer Electronic Corporation Tape position data recording and reproduction method
EP0595411A2 (en) * 1992-10-30 1994-05-04 Koninklijke Philips Electronics N.V. Arrangement for recording a digital signal in a track on a magnetic record carrier
EP0608946A2 (en) * 1993-01-28 1994-08-03 N.V. Philips' Gloeilampenfabrieken Arrangement for recording a video signal and a corresponding audio signal in slant tracks on a longitudinal magnetic record carrier, and record carrier obtained by means of the arrangement
EP0635830A2 (en) * 1993-07-23 1995-01-25 Matsushita Electric Industrial Co., Ltd. Method and apparatus for recording and reproducing digital data
WO1995022143A1 (en) * 1994-02-10 1995-08-17 Philips Electronics N.V. Arrangement for recording or reproducing a digital video signal and a corresponding digital audio signal
US5568328A (en) * 1988-08-05 1996-10-22 Canon Kabushiki Kaisha Video data recording apparatus for recording search data

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134130A (en) * 1976-07-30 1979-01-09 Sony Corporation Method and apparatus of inserting an address signal in a video signal
US4167759A (en) * 1976-07-31 1979-09-11 Sony Corporation Apparatus for inserting an address signal in a frame of the vertical blanking period of a television signal
US4587577A (en) * 1984-02-10 1986-05-06 Pioneer Electronic Corporation Tape position data recording and reproduction method
US5568328A (en) * 1988-08-05 1996-10-22 Canon Kabushiki Kaisha Video data recording apparatus for recording search data
EP0595411A2 (en) * 1992-10-30 1994-05-04 Koninklijke Philips Electronics N.V. Arrangement for recording a digital signal in a track on a magnetic record carrier
EP0608946A2 (en) * 1993-01-28 1994-08-03 N.V. Philips' Gloeilampenfabrieken Arrangement for recording a video signal and a corresponding audio signal in slant tracks on a longitudinal magnetic record carrier, and record carrier obtained by means of the arrangement
EP0635830A2 (en) * 1993-07-23 1995-01-25 Matsushita Electric Industrial Co., Ltd. Method and apparatus for recording and reproducing digital data
US5844739A (en) * 1993-07-23 1998-12-01 Matsushita Electric Industrial Co., Ltd. Method and apparatus for recording and reproducing digital data
WO1995022143A1 (en) * 1994-02-10 1995-08-17 Philips Electronics N.V. Arrangement for recording or reproducing a digital video signal and a corresponding digital audio signal

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