JP2001197387A - Receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a receiver suitable for efficiently taking out and accumulating a transport stream from the receiver when a program is viewed in a satellite digital broadcast where the plural transport streams are overlapped and are constituted of a frame. SOLUTION: Plural means separating the frame constitution of the transport streams from the multiplex transport streams decoded by a transmission line decoding means and selecting and outputting plural streams are installed. At least one output is expanded for viewing and plural other outputs are used for accumulation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver suitable for efficiently extracting, accumulating, and reproducing a transport stream from a receiver in a digital broadcast in which a plurality of transport streams are multiplexed to form a frame.

[0002]

2. Description of the Related Art In recent years, digital satellite broadcasting using a broadcasting satellite (BS) is being planned, and various services such as HDTV broadcasting and data broadcasting are being planned. The transmission system is "BS Digital Broadcasting System and Equipment", Vol. 52, no. 11, pages 24 to 28 (1
November 999). In digital satellite broadcasting using BS, independent transport streams are allocated to multiple operators, and information on multiple transport streams multiplexed by multiplexing transmission control signals onto broadcast waves, information on modulation schemes, etc. To the receiver. In data broadcasting, a service for storing data transmitted in a certain time zone and viewing the data broadcasting program at another time is planned. An example of a receiver having a built-in storage means is described in Nikkei Electronics' “Digital recording device using HDD is finally available for home use”, No. 73
1, page 46 (November 1998) in FIG.

FIG. 5 shows a general example of a BS digital satellite broadcast receiver having a built-in storage means. The figure shows the main part, and the display means and the input / output interface means of the modem / IC card are omitted. 1a and 1b are tuners, 2
a and 2b are transmission path decoding means, 3a and 3b are transport stream (TS) separation / selection means, 5a and 5b are descrambling (DS) / transport stream (TS) packet separation means, 6 is an external device. Disposed storage means, 8 is a digital compression decompression means (MPEG decoder), 9 is a display processing means, 10 is a built-in storage means,
11 is an external interface, 20 is a ROM memory, 21
Is a RAM memory, 22 is a control microcomputer, 100a and 10
0b is a high frequency input terminal, 101 is a transport stream input / output terminal, 201 is an audio output terminal, 202 is a video output terminal, and 300 is an input / output terminal of an external interface.

[0004] In the BS digital satellite broadcast receiver 7,
Digital modulation signals of 1 GHz band are inputted from an outdoor unit (not shown) from input terminals 100a and 100b, desired channels are selected by tuners 1a and 1b, respectively, and inputted to transmission path decoding means 2a and 2b. Transmission path decoding means 2a
And 2b are composed of digital PSK demodulation, error correction, inverse energy spreading, deinterleaving, etc., and decode a plurality of transport streams composed of frames from digitally modulated signals. A plurality of decoded transport streams are input to TS separation / selection 3a and 3b, and transport streams constituting one desired frame are selected and input to descrambling / TS packet separation means 5a and 5b. If it is scrambled, it is released and the transport stream packet is separated. In the packet separation of the transport stream, program information and compressed data of a desired program are selected. The currently viewed data is input to the MPEG decoder 8, and the other is input to the storage means 10. The MPEG decoder 8 digitally expands the video and audio information and outputs a video signal and an audio signal. The video signal is output to the video output terminal 202 after the display processing means 9 adds OSD and graphics to the video output. The data to be stored is stored in the storage unit 10
After that, the data is reproduced by the MPEG decoder 8 as desired. The external interface 11 and the input / output terminal 300 of the external interface are used for connection with the external storage means 6 for storing data.

[0005]

However, in the above-mentioned conventional example, only one transport stream is selectively output by TS separation / selection, so that only one transport stream is stored, and a plurality of channels are stored. There was a drawback that it was not compatible to view various storage-type programs to be performed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks, and in digital satellite broadcasting in which a plurality of transport streams are multiplexed, it is suitable for efficiently extracting and storing transport streams from a receiver and viewing stored programs. It provides a simple receiver.

[0007]

In order to achieve the above object, a receiver according to the present invention is provided with n sets of transmission path decoding means and n sets of transport stream separation / selection means. , Means for selecting m frames and separating and outputting the respective transport streams is provided. The separated first transport stream is for viewing, and the separated transport streams of other frames are stored in the storage means. A part of or the whole is stored, and a switch for selecting the first transport stream and the stored transport stream and inputting them to the packet separating means and the decompressing means is provided. Frame data and up to m stored data frames in other channels. It is possible to product. In the present invention, since the transport stream is stored before being separated into packet information, the amount of data to be stored is large, but all data included in the frame can be used. In addition, since a plurality of stored data are stored in parallel instead of being stored in a series, a plurality of stored data type broadcasts can be easily viewed.

Further, n sets of transmission path decoding means and n sets of transport stream separation / selection means are provided, and the transport stream separation / selection means selects m frames and separates and outputs the respective transport streams. A means for descrambling the corresponding transport stream and separating the packet information, and a switch for selecting one of the m sets of packet information to select a signal to be input to the MPEG decoder. Thus, one packet information is used for viewing, and the packet information obtained by separating the other frames is partially or wholly stored by the storage unit. This allows
It is possible to accumulate packet accumulation data of another frame in the channel being viewed and up to m packet accumulation data in the frame of the other channel. According to the present invention, since the storage stores information separated into packets from the transport stream, the amount of data to be stored can be reduced. In addition, since a plurality of stored data are stored in parallel instead of being stored in a series, a plurality of stored data type broadcasts can be easily viewed.

Further, n sets of transmission path decoding means and n sets of transport stream separation / selection means are provided, and the transport stream separation / selection means selects m frames and separates and outputs the respective transport streams. And means for selecting one transport stream output from each of the m transport streams and inputting them to the means for descrambling and demultiplexing packet information, respectively.
One is selected and input to the MPEG decoder. Part or all of the packet information is stored by the storage means. According to the present invention, since information separated into packets from a transport stream is stored, data to be stored can be reduced. Also, by providing m transport stream outputs and switches, the data to be stored can be switched more quickly.
According to the configuration in which the means for performing one descrambling and packet information separation is replaced with the storage means, the transport stream of the entire frame can be selectively stored, and the plurality of programs in the frame can be stored simultaneously with another program viewing. In addition, switching of data to be stored can be performed more quickly by a switch provided in the transport stream output.

According to the present invention, a suitable receiver can be realized in digital satellite broadcasting for receiving a storage type program in which a plurality of transport streams are multiplexed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention in which n and m are set to 2. FIG. 1 shows a main part, and omits display output means for displaying and outputting video, audio, and data to a user, and input / output interface means of a modem / IC card. 1a and 1b are tuners, 2a and 2b are transmission path decoding means, 3a and 3b are transport stream (TS) separation / selection means, 4 is a switch, 5 is a descramble / transport stream (TS) packet separation means. , 6 is an externally arranged storage means, 8 is a digital compression decompression means (MPEG decoder), 9 is a display processing means, 10 is a built-in storage means, 11 is an external interface, 12 is a buffer memory, and 20 is a ROM. Memory, 21 is a RAM memory, 22 is a control microcomputer, 100
a and 100b are high frequency input terminals, 101 is a transport stream input / output terminal, 201 is an audio output terminal, 202 is a video output terminal, and 300 is an input / output terminal of an external interface.

In the BS digital satellite broadcast receiver 7, a digital modulation signal of 1 GHz band is inputted from an outdoor unit (not shown) from input terminals 100a and 100b, and a tuner 1a.
At 1 and 1b, the desired channel is selected and input to the transmission path decoding means 2a and 2b. Transmission path decoding means 2a and 2
“b” is composed of digital PSK demodulation, error correction, inverse energy spreading, deinterleaving, and the like, and decodes a plurality of transport streams composed of frames from digitally modulated signals. A plurality of decoded transport streams are input to TS separation / selection 3a and 3b, and transport streams constituting desired two frames are selected and output. One transport stream is input to the descrambling / TS packet separation means 5a via the switch 4, and if it is scrambled, it is released to separate the packets of the transport stream. In the packet separation of the transport stream, program information and compressed data of a desired program are selected. The currently viewed data is input to the MPEG decoder 8, and the other is input to the storage means 10. The MPEG decoder 8 digitally expands the video and audio information and outputs a video signal and an audio signal. The video signal is output to the video output terminal 202 after the display processing means 9 adds OSD and graphics to the video output. The other one of the TS separation / selection 3a and the transport stream output of 3b are connected to the storage means 10 via the buffer memory 12. After being stored in the storage means 10, the transport stream is reproduced by the MPEG decoder 8 via the switch 4 as desired. The external interface 11 and the input / output terminal 300 of the external interface are used for connection with the external storage means 6 for storing data.

According to the present embodiment, the transport stream to be viewed can be viewed via the switch 4, and data of another transport stream in the channel being viewed and up to m data in the frame of the other channel can be viewed. Data can also be stored. In this embodiment,
Since the storage stores the transport stream before being separated into packet information, all the data contained in the frame can be used.Multiple stored data are stored in parallel instead of being stored in series. You can easily watch broadcasts of the stored data type.

FIG. 2 is a block diagram showing a digital satellite broadcast receiver according to another embodiment of the present invention. In the figure, the same numbers as those in the other figures indicate the same functional blocks. 5a, 5
Reference numerals b, 5c and 5d denote descrambling / transport stream (TS) packet separating means, and 15 denotes a switch. The outputs of the plurality of transport streams output from the TS separation / selection means 3a and 3b are input to descrambling / transport stream (TS) packet separation means 5a, 5b, 5c, and 5d, respectively, and if necessary, are demultiplexed. TS packets are separated by scrambling. The packet information of the descrambling / transport stream (TS) packet separating means 5a and 5c is input to the MPEG decoder 8 via the switch 15.

In this embodiment, one packet information is used for viewing, and the packet information obtained by separating the other frames is partially or entirely stored by the storage means. Then, the packet accumulation data of another frame in the channel being viewed and the maximum of 2
A maximum of three types of packet information of the packet storage data can be stored. In the present embodiment, since packet information is stored, the amount of data to be stored can be reduced. In addition, since a plurality of stored data are stored in parallel instead of being stored in a series, a plurality of stored data type broadcasts can be easily viewed.

FIG. 3 is a block diagram showing a digital satellite broadcast receiver according to another embodiment of the present invention. In the figure, the same numbers as those in the other figures indicate the same functional blocks. 5a, 5b
Is descramble / transport stream (TS)
, And 16, 16 a and 16 b are switches. The output of the plurality of transport streams output from the TS separation / selection means 3a and 3b is
One transport stream is selected in each of 6a and 16b, input to the descrambling / TS packet separation means 5a and 5b, respectively, and if necessary, descrambled to separate TS packets. The outputs of the scramble / TS packet separation means 5a and 5b are input to the MPEG decoder 8 via the switch 15.

In this embodiment, two types of stored data are selected by providing switches 16a and 16b on the outputs of a plurality of transport streams output from the TS separation / selection means 3a and 3b to select packet information. Selection of information to be stored in the storage means 10 can be performed by the tuner 1
a and 1b and TS separation / selection means 3a and 3b.

FIG. 4 is a block diagram showing a digital satellite broadcast receiver according to another embodiment of the present invention. In the figure, the same numbers as those in the other figures indicate the same functional blocks. Reference numeral 5 denotes a descrambling / transport stream (TS) packet separating unit, and reference numerals 16a and 16b denote switches. As for a plurality of transport streams output from the TS separation / selection means 3a and 3b, one transport stream is selected by the switches 16a and 16b, respectively.
These are inputted to the descrambling / TS packet separating means 5 and the storing means 10, respectively. The output of the switch 16a is input to a descrambling / transport stream (TS) 5, and if necessary, is descrambled and separated into TS packets before being input to the MPEG decoder 8. Switch 1
The output of 6b is input to the storage means 10, and the output of the selected transport stream can be stored.

In the present embodiment, switches 16a and 16b are provided on the outputs of a plurality of transport streams output from the TS separation / selection means 3a and 3b to select two types of stored data by selecting packet information. The transport stream to be stored in the storage unit 10 can be selected by the tuners 1a and 1b or the TS separation / selection unit 3.
This can be done faster than switching between a and 3b.

[0021]

According to the present invention, a plurality of means for separating and selecting a plurality of frame structures of a transport stream from a multiplexed transport stream decoded by a transmission path decoding means and outputting the selected frame structure are provided, and at least one output means is provided. Is expanded for viewing and the other multiple outputs are used for storage, so that even while watching the program, the transport stream of the storage type program can be distinguished between the same channel being watched and other channels. The effect of efficiently accumulating is obtained. Further, according to the present invention, it is possible to realize a receiver suitable for being incorporated in a television receiver, a VTR, and the like even in digital satellite broadcasting in which a plurality of transport streams are multiplexed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a digital satellite broadcast receiver according to one embodiment of the present invention.

FIG. 2 is a block diagram showing a digital satellite broadcast receiver according to another embodiment of the present invention.

FIG. 3 is a block diagram showing a digital satellite broadcast receiver according to another embodiment of the present invention.

FIG. 4 is a block diagram showing a digital satellite broadcast receiver according to another embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional CS digital satellite broadcast receiver.

[Explanation of symbols]

1 ... Tuner, 2 ... Transmission path decoding means, 3 ... Transport stream separation / selection means, 4, 15, 16 ... Transport stream selection switch, 5 ... Descramble /
Transport stream packet separating means, 6, 10
... Storage means, 8 MPEG decoder, 9 Display processing means, 11 External I / F, 12 Buffer, 20 RO
M, 21 RAM, 22 control microcomputer, 100 high frequency input terminal, 201 audio output terminal, 202 video output terminal, 300 external I / F terminal.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C025 BA25 BA27 DA01 DA04 5C063 AB05 AC01 AC05 CA12 CA23 CA31 DA01 5K028 AA00 BB05 CC05 DD01 DD02 EE03 EE08 FF11 KK03 KK23 SS15 SS17

Claims (8)

[Claims] 1. A digitally modulated wave composed of a plurality of multiplexed transport streams in which at least one of video, audio, and data is compressed is input to a tuner and processed by digital demodulation, FEC, deinterleaving, and the like. Means for performing transmission path decoding means and separation / selection means for a transport stream composed of frames; means for descrambling and packet information separation of the selected transport stream; and means for selecting a transport stream of compressed video, audio and data. In a receiver comprising packet separation means and decompression means, n sets of transmission path decoding means, n sets of transport stream separation and selection means, and m frames are selected to separate and output transport streams respectively. Means, and a storage means, The stream separation and the transport stream from which the other frames are separated are partially or wholly stored by the storage means, and the first transport stream and the stored transport stream are selected to select the packet separation means and the decompression means. 1. A receiver comprising means for inputting to a receiver. 2. A digitally modulated wave, which is formed by multiplexing a plurality of transport streams in which at least one of video, audio, and data is compressed, and is composed of a frame, is input to a tuner and performs processing by digital demodulation, FEC, deinterleaving, and the like. Means for performing transmission path decoding means and separation / selection means for a transport stream composed of frames; means for descrambling and packet information separation of the selected transport stream; and means for selecting a transport stream of compressed video, audio and data. In a receiver comprising packet separation means and decompression means, n sets of transmission path decoding means, n sets of transport stream separation and selection means, and m frames are selected to separate and output transport streams respectively. Means and corresponding transport streams Providing a means for separating the descramble of the stream and the packet information, comprising a storage means, and the descramble and the packet information separation output connected to the first transport stream output of each set are input,
Means for inputting the selected packet information to the decompression means, and descrambling and packet information of each set of other separated transport streams are input to the decompression means after being partially or entirely stored by the storage means. A receiver comprising means. 3. A digitally modulated wave composed of a plurality of multiplexed transport streams in which at least one of video, audio or data is compressed is inputted, and the tuner is processed by digital demodulation, FEC, deinterleaving, etc. Means for performing transmission path decoding means and separation / selection means for a transport stream composed of frames; means for descrambling and packet information separation of the selected transport stream; and means for selecting a transport stream of compressed video, audio and data. In a receiver comprising packet separation means and decompression means, n sets of transmission path decoding means, n sets of transport stream separation and selection means, and m frames are selected to separate and output transport streams respectively. Means and separate transports for each Means for descrambling n sets of trims to separate packet information, means for selecting and outputting n sets of packet information separation outputs to the decompression means, and storage means, at least data not input to the decompression means. A receiver characterized by comprising means for inputting to a decompression means after part or all of the packet information separated from the scrambled and packet information is stored by a storage means. 4. A digitally modulated wave, which is formed by multiplexing a plurality of transport streams in which at least one of video, audio or data is compressed, and which is formed into a frame, is input to a tuner and processed by digital demodulation, FEC, deinterleaving, and the like. Means for performing transmission path decoding means and separation / selection means for a transport stream composed of frames; means for descrambling and packet information separation of the selected transport stream; and means for selecting a transport stream of compressed video, audio and data. In a receiver comprising packet separation means and decompression means, n sets of transmission path decoding means, n sets of transport stream separation and selection means, and m frames are selected to separate and output transport streams respectively. Means and n sets of first transport stream outputs Means for descrambling the packet information and separating the packet information, and means for accumulating one of the remaining packet information, wherein at least the descrambling not input to the decompression means and the packet information separated from the packet information are stored in the storage means. A means for inputting to a decompression means after a part or the whole of the data is stored. 5. A receiver according to claim 1, wherein said storage means is storage means arranged outside said receiver via an external interface. 6. A receiver according to claim 1, wherein n of n sets of transmission path decoding means and n sets of transport stream separation / selection means is 2. 7. A receiver according to claim 1, wherein m of means for selecting m frames, separating and outputting each of the transport streams is two. 8. A receiver according to claim 1, further comprising display output means for displaying and outputting the video, audio and data decompressed by the decompression means.