Patent EP0712250A2 successfully refreshed from Google Patents.
EP0712250A2
Expired / Lapsed
EP
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Decode and encode systems and methods
Assignee: Sony Corp
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Filing: 1995-11-08
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Granted: —
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Expires: 2015-11-08
Abstract
Abstract In a data decoding technique, a system clock is generated on the basis of a time stamp contained in transmission data to be transmitted every packet, and the transmission data are decoded on the basis of the system clock. The transmission data are stored in a buffer memory (41) before a time stamp is extracted, and the packet storage amount of the transmission data stored in the buffer memory (41) is detected by a counter (43) to increase the read-out rate of the transmission data from the buffer memory (41) by a buffer control circuit (55) when the storage amount is larger than a predetermined reference value, and to reduce the read-out rate of the transmission data from the buffer memory (41) when the storage amount is smaller than the predetermined reference value.
Inventors
- 👤 Eisaburo Itakura
- 👤 Paul Hodgins
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:33
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0009; H04L1/0013; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/242; H04L1/0015; H04N21/231; H04N21/23106; H04N21/238; H04N21/23805; H04N21/40; H04N21/43; H04N21/4302; H04N21/4305; H04N21/44; H04N21/44004; H04N21/442; H04N21/44209
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
137 words
A decode system comprising: extraction means for extracting time information contained in transmission data; system clock generating means for generating a system clock serving as a criterion to process the transmission data; storing means for storing the transmission data supplied to said extraction means; detection means for detecting a storage amount of the transmission data in said storing means; and read-out control means for controlling a read-out rate of the transmission data from said storing means in accordance with the detection result of said detection means so that the read-out rate of the transmission data from said storing means is increased when the storage amount is larger than a predetermined reference value, and the read-out rate of the transmission data from said storing means is reduced when the storage amount is smaller than the predetermined reference value.
Claim 2
Dependent Claim
16 words
The decode system as claimed in claim 1, wherein the time information is a time stamp.
Claim 3
Dependent Claim
32 words
The decode system as claimed in claim 1 or 2, wherein said detection means has count means for counting the number of units of the transmission data stored in said storing means.
Claim 4
Dependent Claim
14 words
The decode system as claimed in claim 3, wherein the unit is a packet.
Claim 5
Dependent Claim
32 words
The decode system as claimed in claim 4, wherein said counter means increments a count value when a packet is stored, and decrements a count value when a packet is read out.
Claim 6
Dependent Claim
71 words
The decode system as claimed in claim 5, further comprising: timing signal generating means for generating a timing signal to sample the count value of said counting means; comparing means for comparing a predetermined reference value and the count value of said counting means when said timing signal generating means generates a timing signal; and reference value generating means for generating the reference value to be compared in said comparing means.
Claim 7
Dependent Claim
51 words
The decode system as claimed in claim 6, wherein said timing signal generating means comprises: a counter for counting a predetermined count clock; a comparator for comparing the count value of said counter and a predetermined reference count value; and reference count value generating means for generating the reference count value.
Claim 8
Dependent Claim
57 words
The decode system as claimed in claim 6, wherein said read-out control means comprises: setting means for setting a read-out rate of transmission data stored in said storing means; and converting means for converting the output of said comparing means to the read-out rate of the transmission data and outputting the read-out rate to said setting means.
Claim 9
Dependent Claim
61 words
The decode system as claimed in claim 8, wherein said setting means comprises: a counter for counting a predetermined count clock; a read-out rate setting circuit for setting a predetermined read-out rate in accordance with the output of said converting means; and a comparator for comparing the count value of said counter and the output of said read-out rate setting circuit.
Claim 10
Dependent Claim
118 words
A decode method in which a system clock is generated on the basis of a time stamp contained in transmission data to be transmitted every packet, and the transmission data are decoded on the basis of the system clock, comprising the steps of: storing the transmission data into a buffer memory before the time stamp is extracted; detecting a packet storage amount of the transmission data stored in the buffer memory; increasing the read-out rate of the transmission data from the buffer memory when the storage amount is larger than a predetermined reference value; and reducing the read-out rate of the transmission data from the buffer memory when the storage amount is smaller than the predetermined reference value.
Claim 11
Dependent Claim
67 words
An encode system comprising: encode means for encoding data at a variable bit rate; packetting means for adding time stamps to the encoded data to packet the data; calculating means for calculating the interval of the packet which is packeted by said packetting means; and transmission means for transmitting the packet packeted by said packetting means and interval data for the interval calculated by said calculating means.
Claim 12
Dependent Claim
82 words
A decode system comprising: storing means for storing data of a variable bit rate which is transmitted on a packet basis; interval data detection means for detecting interval data for the interval of packets which are transmitted together with data; and delay time control means for controlling a delay time from the time when the packet is stored in said storing means until the time when it is read out, in accordance with the detection result of said interval data detection means.
Claim 13
Dependent Claim
77 words
The decode system as claimed in claim 12, wherein said storing means comprises first storing means for storing plural packets and second storing means for storing a packet read out from said first storing means, and said delay time control means controls said first and second storing means so that the total time of the delay time of said first storing means and the delay time of said second storing means is equal to a predetermined time.
Claim 14
Dependent Claim
60 words
The decode system as claimed in claim 12, further comprising: storage amount detection means for detecting the amount of packets stored in said storing means; and output rate control means for controlling the output rate at which the packet is read out and output from said storing means, in accordance with the detecting result of said storage amount detection means.
Claim 15
Dependent Claim
60 words
The decode system as claimed in claim 13, further comprising: storage amount detection means for detecting the amount of packets stored in said storing means; and output rate control means for controlling the output rate at which the packet is read out and output from said storing means, in accordance with the detecting result of said storage amount detection means.
Claim 16
Dependent Claim
48 words
An encode method comprising the steps of: encoding data at a variable bit rate; adding time stamps to the encoded data to packet the data; calculating the interval of the packet of the encoded and packeted data; and transmitting interval data of the interval together with the packet.
Claim 17
Dependent Claim
97 words
A decode method comprising the steps of: storing into a memory data which are transmitted on a packet basis at a variable bit rate; extracting the interval data corresponding to the interval of the packet from the data to control the output rate at which the data stored in the memory are read out and output, in accordance with the extracted interval data; extracting the time stamp from the data output from the memory; generating a system clock with the extracted time stamp; and decoding the data output from the memory by using the generated system clock.
Claim 18
Dependent Claim
94 words
An encode system comprising: encode means for encoding data at a variable bit rate; generating means for generating time stamps to be added to the data; packetting means for adding the encoded data with the time stamps to packet the data; setting means for setting a data rate for packet transmission every predetermined section; calculating means for calculating a transmission interval of the packet in accordance with the data rate; and transmitting means for transmitting data rate data of the data rate and the packet at the transmission interval calculated by said calculating means.
Claim 19
Dependent Claim
64 words
An encode method comprising the steps of: encoding data at a variable bit rate; adding the encoded data with time stamps to packet the data; setting a data rate for packet transmission every predetermined section; calculating a packet transmission interval in accordance with the data rate; and transmitting the data rate data of the data rate and the packet at the calculated transmission interval.
Claim 20
Dependent Claim
65 words
An encode data recording device comprising: storing means for storing input data which are encoded at a variable bit rate and added with time stamps to be packeted and the data rate data of the data rate at which the packet is transmitted; and recording means for reading out the data stored in said storing means and recording the read-out data onto a recording medium.
Claim 21
Dependent Claim
58 words
An encode data recording method comprising the steps of: storing input data which are encoded at a variable bit rate and added with time stamps to be packeted and the data rate data of the data rate at which the packet is transmitted; and reading out the recorded data and recording the read-out data onto a recording medium.
Claim 22
Dependent Claim
102 words
An encode data transmission device comprising: read-out means for reading out data from a recording medium on which encoded data which are encoded at a variable bit rate and added with a time stamp to be packeted are recorded together with data rate data of a data rate at which the packet is transmitted; detection means for detecting the data rate data from the data; calculating means for calculating a packet transmission interval in accordance with the data rate data; and transmitting means for transmitting the packet together with the data rate data at the transmission interval calculated by said calculating means.
Claim 23
Dependent Claim
92 words
An encode data transmission method comprising the steps of: reading out data from a recording medium on which encoded data which are encoded at a variable bit rate and added with a time stamp to be packeted are recorded together with data rate data of a data rate at which the packet is transmitted; detecting the data rate data from the data; calculating means for calculating a packet transmission interval in accordance with the data rate data; and transmitting the packet together with the data rate data at the calculated transmission interval.
Claim 24
Dependent Claim
40 words
A recording medium on which encoded data which are encoded at a variable bit rate and added with a time stamp to be packeted are recorded with data rate data of a data rate at which the packet is transmitted.
References Cited (Backward Citations)
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