Electrical computers and digital processing systems: multicomput – Remote data accessing – Accessing a remote server
Patent
1998-05-04
2000-12-05
Rinehart, Mark H.
Electrical computers and digital processing systems: multicomput
Remote data accessing
Accessing a remote server
709201, 709202, 709203, 709219, 709 1, 709103, 709106, 707103, 707104, 382232, 382235, G06F 1730
Patent
active
061579483
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a program reception/execution apparatus that receives and executes a transmitted machine program and to a program transmission apparatus for transmitting such a machine program, and in particular to a program reception/execution apparatus that receives and executes a transmitted machine program for performing control that relates to programs broadcast by a digital broadcasting system and to a program transmission apparatus for transmitting such a machine program.
2. Related Art
In recent years there have been rapid advances in techniques relating to the digitization of various kinds of information signals, such as audio and video. As a result, a great amount of research and development is being performed all over the world with the aim of achieving a system capable of acting both as a digital broadcasting system and digital communication system.
In the development of digital broadcasting systems, one of the most important issues is the compression processing of digitized image signals and audio signals. Standards such as Moving Picture Image Coding Experts Group (MPEG), Joint Photographic Coding Experts Group (JPEG) and H.261 have become established as the main techniques for compression processing for these kinds of data, although another technique known as ISO/IEC 13818 [ISO/IEC JTC (Joint Technical Committee)1/SC(Subcommittee)29/WG(Working Group)] has been proposed by the ISO (International Organization for Standardization) and the IEC (International Electrotechnical Commission). This technique is a broad technique that applies to broadcasting, communication, and storage media and is currently under review prior to becoming an international standard.
The technique known as ISO/IEC 13818 does not only apply to a data compression method, but also stipulates a method to be used for a control part for a digital broadcasting system where a broadcaster separately performs a compression process on digital images, audio, and other data that compose a program and multiplexes the compressed data into a bitstream, while a receiver apparatus selectively receives a desired program. It should be noted here that in this specification, the term "program" refers to a TV program or other such event which is broadcast, while the term "machine program" refers to a collection of one or more instructions which is conventionally known as a (computer) program.
The following is a description of the compression processing performed for digital image data and digital audio data and the multiplexing of the compressed data into a bitstream for communication purposes, based on the regulations of ISO/IEC 13818. This description will refer to FIG. 1, FIG. 2, and FIG. 3.
FIG. 1 is an overview of the components which perform the compression processing on the digital image data and digital audio data, and multiplex the compressed data into a bitstream.
After digital image data has been compressed by the image encoding circuit 1311 and converted into an image elementary stream ("image ES"), it is outputted to the packetizing circuit 1312 where it is divided into packet units to convert it into an image Packetized Elementary Stream (PES) that will form one frame. This packetized elementary stream is then supplied to the multiplexing circuit 1313. The digital audio data is compressed by the audio encoding circuit 1314 and so converted into an audio ES. This audio ES is supplied to the packetizing circuit 1315 where it is divided into packet units to convert it into an audio PES that will form one frame. The audio PES is also supplied to the multiplexing circuit 1313. The multiplexing circuit 1313 multiplexes the image PES and the audio PES according to time division multiplexing and so generates a multiplexed signal in packet units composed of 188 bytes that form a Transport Stream (TS).
In the multiplexed signal, both images and audio are divided up into one frame units, with these being composed of PES that have been appended with a header.
FIG. 2 show
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An Application of MPEDG-2 Systems to ISDB Transport System, by T.Kimura et al., ITE Technical Report, vol. 18, No. 28, May 1994.
Hirai Junichi
Inoue Shinji
Kakiuchi Takashi
Kozuka Masayuki
Kusumi Yuki
Le Hieu C.
Matsushita Electric - Industrial Co., Ltd.
Rinehart Mark H.
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