EP0942603A2
Expired / Lapsed
EP
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Video splicing apparatus and video splicing method
Assignee: Sony Corp
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Filing: 1999-03-09
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Granted: —
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Expires: 2019-03-09
Abstract
Abstract A video splicing apparatus is provided for receiving a transport stream including a plurality of packetized encoded video data streams, and for splicing the encoded video data streams to generate a spliced video data stream. The video splicing apparatus includes an input processor for disassembling each of the plurality of packetized encoded video data streams in the transport stream into a pseudo-elementary stream before packetization, and for storing the disassembled pseudo-elementary streams in predetermined storage. An analyzer is also provided for analyzing the amount of coded bits of two data streams of the pseudo-elementary streams stored in the storage that will be generated upon decoding upon receipt of the two data streams to be subjected to a splicing operation. A data processor is provided for reading the data streams to be subjected to the splicing operation from the storage, splicing the streams, and inserting a desired amount of additional data at a splice point based on the result of the analysis by said analyzer to produce a spliced video data stream and storing the spliced video data stream in the storage. An output processor is provided for determining output timing for the spliced video data stream based on the determined amount of coded bits, and outputting the spliced video data stream read from the storage based on the output timing.
Inventors
- 👤 Takuya Intellectual Property Department Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/234; H04N21/23424; H04N21/236; H04N21/23608; H04N21/23611; H04N21/24; H04N21/2401; H04N21/80; H04N21/85; H04N21/858; H04N7/00; H04N7/24; H04N7/52; H04N7/54
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
218 words
A video splicing apparatus for receiving a transport stream including a
plurality of packetized encoded video data streams, and for splicing said encoded video data
streams to generate a spliced video data stream, comprising: input processing means for disassembling each of said plurality of packetized
encoded video data streams in said transport stream into a pseudo-elementary stream before
packetization, and storing said disassembled pseudo-elementary streams in predetermined
storage means; analysis means for analyzing the amount of coded bits of two data
streams of said elementary streams stored in said storage means that would be generated upon
decoding upon receipt of the two data streams to be subjected to a splicing operation; data processing means for reading said data streams to be subjected to said
splicing operation from said storage means, splicing said streams, and inserting a desired
amount of additional data at a splice point based on the result of the analysis by said analysis
means to produce a spliced video data stream, and storing said spliced video data stream in said
storage means; and output processing means for determining output timing for said spliced video
data stream based on said amount of coded bits determined by said analysis means, and
outputting said spliced video data stream read from said storage means based on said
determined output timing.
Claim 2
Dependent Claim
61 words
The video splicing apparatus according to claim 1, wherein: said input processing means rearranges said respective encoded video data
streams in accordance with packet identification information while adding pointer information
to each of said encoded video data streams, and stores said encoded video data streams in said
storage means to disassemble said respective encoded video data streams into said pseudo-elementary
streams.
Claim 3
Dependent Claim
95 words
The video splicing apparatus according to claim 2, wherein: said input processing means comprises a plurality of tables having address
information arranged in accordance with the packet identification information corresponding to
storage locations of said storage means, and wherein said video splicing apparatus retrieves
address information corresponding to packet identification information of an input data stream
while referencing said plurality of tables in parallel, and rearranges said respective encoded
video data streams in accordance with the packet identification information and stores the
rearranged video data streams in said storage means based on said address information.
Claim 4
Dependent Claim
74 words
The video splicing apparatus according to any preceding claim, wherein: said data processing means inserts a desired number of blanking pictures and
stuffing bits as said additional data such that a buffer in a decoder that will receive and decode
the spliced data stream side does not overflow or underflow, based on the amount of data that
would be generated in said decoder for each of said data streams subjected to the splicing
operation.
Claim 5
Dependent Claim
32 words
The video splicing apparatus according to any preceding claim, wherein: said analysis means analyzes at least two or more video data streams to be
subjected to splicing in a time division manner.
Claim 6
Dependent Claim
44 words
The video splicing apparatus according to any preceding claim, wherein: said output processing means further includes time stamp adding means for
adding new time stamps such that said time stamps are continuous before and after said splice
point in said spliced video data stream.
Claim 7
Dependent Claim
34 words
The video splicing apparatus according to any preceding claim, wherein: said output processing means further includes program clock reference correcting
means for correcting a program clock reference in said output spliced video data stream.
Claim 8
Dependent Claim
47 words
The video splicing apparatus according to claim 7, wherein: said program clock reference correcting means corrects said program clock
reference based on a difference in time between said output timing after splicing and an output
timing that would be used if the data had not been spliced.
Claim 9
Dependent Claim
40 words
The video splicing apparatus according to any preceding claim, wherein: said input processing means stores an input time at which each packet of said
respective encoded video data streams was input associated with each packet of said encoded
data streams.
Claim 10
Dependent Claim
58 words
The video splicing apparatus according to claim 9, wherein: when said encoded video data streams not subjected to a splicing operation are
output together with said spliced video data stream, said output processing means specifies
output timing for said encoded video data stream not subjected to the splicing operation, said
output timing being related to said input time.
Claim 11
Dependent Claim
171 words
A video splicing method for receiving a transport stream including a
plurality of packetized encoded video data streams, and for splicing said encoded video data
streams to generate a spliced video data stream, comprising the steps of: disassembling each of said plurality of packetized encoded video data streams in
said transport stream into a pseudo-elementary stream before packetization; storing said disassembled pseudo-elementary streams; analyzing the amount of coded bits of two of said pseudo-elementary streams
that would be generated upon decoding upon receipt of the two data streams to be subjected to a
splicing operation; reading said data streams to be subjected to the splicing operation; splicing said data streams; inserting a desired amount of additional data at a splice point based on the result
of said analysis to produce a spliced video data stream, storing said spliced video data stream; determining output timing for said spliced video data stream based on said
determined amount of coded bits; and outputting said spliced video data stream based on said determined output timing.
Claim 12
Dependent Claim
49 words
The video splicing method according to claim 11, wherein: said respective encoded video data streams are rearranged in accordance with
packet identification information while adding pointer information to each of said encoded
video data streams, and said encoded video data streams are disassembled into-pseudo
elementary streams and are stored.
Claim 13
Dependent Claim
76 words
The video splicing method according to claim 12, further comprising the
steps of: providing a plurality of tables having address information corresponding to
storage locations of said encoded video data streams arranged in accordance with the packet
identification information; retrieving address information while referencing said plurality of tables in
parallel; rearranging said respective encoded video data streams in accordance with the
packet identification information and storing the rearranged video data streams based on said address information.
Claim 14
Dependent Claim
71 words
The video splicing method according to any of claims 11 to 13, further comprising
the step of: inserting a desired number of blanking pages and stuffing data such that a
buffer in a decoder that will receive and decode the spliced data stream side does not
overflow or underflow, based on the amount of data that would be generated in said
decoder for said data streams subjected to the splicing operation.
Claim 15
Dependent Claim
36 words
The video splicing method according to any of claims 11 to 14,
further comprising the step of: analyzing at least two or more video data streams to be subjected to
splicing in a time division manner.
Claim 16
Dependent Claim
46 words
The video splicing method according to any of claims 11 to 15,
further comprising the step of: adding new time stamps to said spliced video data stream such that said
time stamps are continuous before and after said splice point in said spliced video data
stream.
Claim 17
Dependent Claim
29 words
The video splicing method according to any of claims 11 to 16,
further comprising the step of: correcting a program clock reference in said output spliced video data
stream.
Claim 18
Dependent Claim
47 words
The video splicing method according to claim 17, wherein:
said program clock reference correcting step corrects said program clock reference
based on a difference in time between said output timing after splicing and an output
timing that would be used if the data had not been spliced.
Claim 19
Dependent Claim
43 words
The video splicing method according to any of claims 11 to 18,
further comprising the step of: storing an input time at which each packet of said respective encoded
video data streams was input associated with each packet of said encoded data streams.
Claim 20
Dependent Claim
50 words
The video splicing method according to claim 19, wherein: when said encoded video data streams not subjected to a splicing operation are
output together with said spliced video data stream, output timing for said encoded video data
stream not subjected to splicing is specified in accordance with said input time.
Claim 21
Dependent Claim
137 words
A splicing apparatus for splicing together a first coded video stream and a
second coded video stream, comprising; parser means for parsing a syntax of said first coded video stream and a syntax of
said second coded video stream; splice means for splicing said first coded video stream and said second coded
video stream at a splicing point to generate a spliced video stream; and control means for generating a splicing instruction to be supplied to said splice
means in accordance with a command from said parser means for controlling said splice means
based on said splicing instruction so as to insert dummy bits between said first coded video
stream and said second coded video stream in said spliced video stream so that a coding buffer
which stores said spliced video stream does not overflow or underflow.
Claim 22
Dependent Claim
46 words
The splicing apparatus according to claim 21, wherein: said parser means simulates a bit occupancy value of a codec buffer holding said
first coded stream and a bit occupancy of a codec buffer holding said second coded stream based
on the result from said parsing means.
Claim 23
Dependent Claim
45 words
The splicing apparatus according to claim 22, wherein: said control means controls said splice means so that said bit occupancy value of
said codec buffer holding said spliced video data stream equals said bit occupancy value of said
codec buffer holding said second coded stream.
Claim 24
Dependent Claim
22 words
The splicing apparatus according to claim 23 wherein: said dummy data comprises at least one of a blanking picture and stuffing bits.
Claim 25
Dependent Claim
51 words
The splicing apparatus according to claim 24, wherein: said control means calculates a number of said blanking pictures and amount
of said stuffing bits based on a bit occupancy value of a last picture of said first stream and a
bit occupancy value of a first picture of said second stream.
Claim 26
Dependent Claim
54 words
The splicing apparatus according to claim 25, wherein: said splice means inserts said blanking pictures in order to increase the bit
occupancy value of said codec buffer holding said spliced video stream, and stuffs said
stuffing bits in order to decrease the bit occupancy value of said codec buffer holding said
spliced video stream.
Claim 27
Dependent Claim
29 words
The splicing apparatus according to claim 26, wherein: said control means determines the amount of stuffing bits to be stuffed after
the number of said blanking pictures is determined.
Claim 28
Dependent Claim
47 words
The splicing apparatus according to claim 22, wherein: said control means controls said splice means so that variations in the
occupancy value of the codec buffer holding said spliced video stream agree with variations of
said occupancy value of said codec buffer holding said second coded stream.
Claim 29
Dependent Claim
50 words
The splicing apparatus according to claim 21, wherein: said control means revises time stamps of said spliced video stream so that
said time stamps of said second coded video stream within said spliced video stream are
continuous from time stamps of first coded video stream within said spliced video stream.
Claim 30
Dependent Claim
82 words
The splicing apparatus according to claim 21, further comprising:
memory means for storing said first coded stream and said second coded stream; wherein said control means adds pointer information to first and second coded
streams, wherein said pointer information indicates memory address of codec parameters of
said first and second coded streams stored in said memory means, and wherein said splicing
instruction is generated based on said codec parameters which are read out from said memory
means by using said pointer information.
Claim 31
Dependent Claim
143 words
A splicing apparatus for splicing together a first coded video stream and a
second coded video stream, comprising; parser means for parsing a syntax of said first coded video stream and a syntax of
said second coded video stream, splice means for switching said first coded video stream and said second coded
video stream at a splicing point to generate a spliced video stream; control means for controlling said splice means to insert a number of dummy bits
between said first coded video stream and said second coded video stream in said spliced video
stream so that a buffer occupancy of a buffer holding said second coded video stream in said
spliced video stream matches a buffer occupancy of said second coded video stream that would
be generated if said second coded video stream were not spliced to said first coded video
stream.
Claim 32
Dependent Claim
127 words
A splicing apparatus for splicing a first coded video stream and a second
coded video stream, comprising: parser means for parsing a syntax of said first coded video stream and a syntax of
said second coded video stream; splice means for switching said first coded video stream and said second coded
video stream at a splicing point to generate a spliced video stream; control means for controlling said splice means so that variations in a buffer
occupancy of the second coded video stream in said spliced video stream agree with variations
of a buffer occupancy that would be present as a result of an original second coded video stream
supplied to said splicing apparatus if said second coded video stream were not subjected to the
splicing operation.
References Cited (Backward Citations)
No citation records indexed.
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