EP0712257A2
Expired / Lapsed
EP
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Packet data recording apparatus and reproducing apparatus therefor
Assignee: Toshiba Corp
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Filing: 1995-11-13
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Granted: —
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Expires: 2015-11-13
Abstract
Abstract A data packet recording apparatus according to a first aspect of the present invention is comprised of: a trick play packet generator (25) for generating trick play data by extracting one or plural types of prescribed data packets from an input data packet train comprising plural types of time-division multiplexed data in a prescribed number of packets based on an identification signal inserted for every packet and outputting a trick play data packet train by packetizing the generated trick play data; an identification table packet inserter for separating and retaining an identification table packet contained in the input data packet train for discriminating the identification signal and outputting the identification table packet into the trick play data packet train several times; and a recording circuit which is capable of recording the output of the identification table packet inserting means in trick play data recording areas at specified track positions.
Inventors
- 👤 Yoshihisa c/o Intellectual Prop. Div. Sakazaki
- 👤 Shuji c/o Intellectual Prop. Div. Abe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:24
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/783; H04N9/82; H04N9/8205; H04N9/8227
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
136 words
A packet data recording apparatus comprising: trick play packet generating means for generating trick play data by extracting one or plural types of prescribed data packets from an input data packet train comprising plural types of time-division multiplexed data in a prescribed number of packets based on an identification signal inserted for every pocket and outputting a trick play data packet train by packetizing the generated trick play data; identification table packet inserting means for separating and retaining an identification table packet contained in the input data packet train for discriminating the identification signal and outputting the identification table packet into the trick play data packet train several times; and recording means which is capable of recording the output of the identification table packet inserting means in trick play data recording areas at specified track positions.
Claim 2
Dependent Claim
36 words
A packet data recording apparatus as claimed in claim 1, wherein the identification table packet inserting means inserts an identification table packet into the trick play data packet train in data constructing a trick play image.
Claim 3
Dependent Claim
47 words
A packet data recording apparatus as claimed in claim 1, wherein the trick play packet generating means sets up an identification signal which is different from the identification signal contained in the input data packet train as an identification signal for the trick play data packet train.
Claim 4
Dependent Claim
43 words
A packet data recording apparatus as claimed in claim 3, wherein the trick play packet generating means assigns a prescribed code which is not set up for the input data packet train as an identification signal for the trick play data packet train.
Claim 5
Dependent Claim
136 words
A packet data recording apparatus comprising: trick play packet generating means for generating trick play data by selecting one or plural types of prescribed data packets from an input data packet train comprising plural types of time-division multiplexed data in a prescribed number of packets based on an identification signal inserted for every packet and outputting a trick play data packet train by packetizing the generated trick play data; identification table packet inserting means for separating and retaining an identification table packet contained in the input data packet train for discriminating the identification signal and outputting the identification table packet into the trick play data packet train several times; and recording means which is capable of recording the output of the identification table packet inserting means in trick play data recording areas at specified track positions.
Claim 6
Dependent Claim
57 words
A reproducing apparatus comprising: reproducing means for reproducing the data recorded by a recording means as claimed in claim 5: identification table packet generating means for generating an identification table packet responding to the prescribed code; and mixing means for mixing the output of the reproducing means with the output of the identification table packet generating means.
Claim 7
Dependent Claim
136 words
A data packet recording apparatus comprising: trick play packet generating means for constructing trick play data packet by extracting desired packets from an input data packet train comprising different types of packets time-division multiplexed in a prescribed number of packets including a packet ID identifying the type of data packet and packetizing the generated trick play data; specific packet inserting means for generating trick play packets by inserting a packet having a specific packet ID in the prescribed number of packets provided for the trick play frames output from the trick play data packet generating means for indicating the boundary of the trick play frames corresponding to the trick play data; and recording means for recording the trick play packets in trick play data recording areas at prescribed positions of tracks formed on a magnetic tape.
Claim 8
Dependent Claim
66 words
A data packet recording apparatus as claimed in claim 7, wherein the specific packet inserting means is comprised of a position detecting means for detecting a boundary position between a prescribed number of packets provided for the trick play frames; and multiplexing means for arranging a packet having a specific packet ID at a prescribed position for the boundary position detected by the position detecting means.
Claim 9
Dependent Claim
58 words
A data packet recording apparatus as claimed in claim 8, wherein the multiplexing means is comprised of a storage means for storing the packet having the specific packet ID separated from the input data packet train; and reading means for reading packets stored in the storage means according to the boundary position detected by the position detecting means.
Claim 10
Dependent Claim
38 words
A data packet recording apparatus as claimed in claim 8, wherein the multiplexing means arranges a packet having a specific packet ID immediately before or immediately after the prescribed number of packets provided for the trick play frames.
Claim 11
Dependent Claim
34 words
A data packet recording apparatus as claimed in claim 7, wherein the recording means records the same trick play packets in the number of trick play data recording areas responding to playback speed multiple.
Claim 12
Dependent Claim
31 words
A data packet recording apparatus as claimed in claim 7, wherein the packet having the specific packet ID is a transport data packet at the 0th PID in the MPEG standard.
Claim 13
Dependent Claim
75 words
A data packet reproducing apparatus for playing back the magnetic tape recorded by the data packet recording apparatus as claimed in claim 7, comprising: specific packet detecting means for detecting the packet having the specific packet ID from the reproduced data which is obtained by playing back the magnetic tape; and rearranging means for rearranging the reproduced data in packets based on the detection by the specific packet detecting means in the fast reverse playback.
Claim 14
Dependent Claim
69 words
A data packet reproducing apparatus as claimed in claim 13, wherein the specific packet detecting means is comprised of: top position detecting means for detecting the top of every packet from the reproduced data; and identification means for identifying the packet ID inserting position of each packet based on the top position detected by the top position detecting means and identifying whether the packet has the specific packet ID.
Claim 15
Dependent Claim
34 words
A data packet reproducing apparatus as claimed in claim 14, wherein the top position detecting means detects the top of each packet based on a sync byte positioned at the top of the packet.
Claim 16
Dependent Claim
24 words
A data packet reproducing apparatus as claimed in claim 14, wherein the packet ID is a PID of the MPEG standard transport data packet.
Claim 17
Dependent Claim
63 words
A data packet reproducing apparatus as claimed in claim 13, wherein the rearranging means has a storage means which stores reproduced data in packets, rearranges a series of the reverse trick play frames based on the detection by the specific packet detecting means and outputs a prescribed number of packets provided for the trick play frames to arrange them in the recorded order.
References Cited (Backward Citations)
No citation records indexed.
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