Data transmitter, data transmitting method, data receiver, infor

Details Data transmitter, data transmitting method, data receiver, infor Data transmitter, data transmitting method, data receiver, infor

1997-08-11

2000-04-04

Garber, Wendy

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 5, 360 60, H04N 591

Patent

active

060471034

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to an information recording medium for recording an information signal representing at least one of program data, audio information, and video information, data transmitting device/method for retrieving the information signal from the information recording medium, a data receiving device for reproducing a video signal from the retrieved video digital data, and an information processing apparatus including the data transmitting device and the data receiving device.


BACKGROUND ART

A CD-ROM (compact disc read only memory) is known as an information recording medium for program data, audio information, and video information. Such a CD-ROM has an information capacity of 540 MB and is widely used as a distribution medium for program data, audio information, and video information. Information recorded in the CD-ROM is retrieved and processed by a personal computer incorporating a CD-ROM drive, for example.
In recent years, with the enhancement in the processing environments of audio information and video information on personal computers, audio information and video information stored in a CD-ROM can be directly output on a personal computer. When video information is stored in a CD-ROM, it is necessary to conduct digital compression to the video information and to store the compressed video information in the CD-ROM, since the video information has a large amount of data. An MPEG1 (moving picture experts group 1) method, for example, is used as a method for compressing video information where the transfer rate of CD-ROMs of 1.2 Mbps is available. The MPEG1 method employs interframe compression as its main compression principle. Video information is a moving picture composed of still pictures called "several ten frames per second". In the interframe compression, sufficient data for reproducing a still picture is prepared for one frame every several frames. For the remaining frames, only data representing the difference from the frame provided with sufficient data is prepared, thus to compress the required data amount.
In the MPEG1 method, in reality, audio information which is mixed in video information is also compressed together with the video information, generating digital data called an MPEG system stream. It is therefore difficult to unconditionally distinguish the video information from the audio information in the digital data. Such data including video information and audio information as well as information required for reproducing the data mixed therein is often called data having an audio and video (AV) data configuration or AV data. Herein, such data including video information and audio information mixed therein is referred to as "AV data".
In the MPEG1 method, the horizontal resolution of images is on the order of 250 lines. This is not sufficiently high for applications requiring high-quality images such as movie applications. A laser disc (LD) having a horizontal resolution of 430 lines has conventionally been used as a medium for storing such applications requiring high-quality images. The LD however stores video information in an analog form. In recent years, a digital video disk (DVD) has been proposed as a new optical disk which stores data in a digital form so as to be processed by personal computers and has a level of resolution required for movie application. The DVD has an information capacity eight times or more of that of the CD-ROM and realizes a data transmission rate five times or more of that of the CD-ROM. The DVD employs a MPEG2 method as the method for compressing video information which realizes a horizontal resolution of 450 lines or more to obtain high-quality moving pictures required for movie applications.
Hereinbelow, a personal computer incorporating a CD-ROM drive as a conventional information processing apparatus will be described with reference to FIGS. 30 and 31, where AV data stored in the CD-ROM is directly reproduced and output by the personal computer itself.
FIG. 31 is a view showing a configuration of a convention

REFERENCES:
patent: 5475756 (1995-12-01), Merritt
patent: 5574787 (1996-11-01), Ryan
patent: 5694381 (1997-12-01), Sako
patent: 5710674 (1998-01-01), Takei et al.
patent: 5724475 (1998-03-01), Kirsten
patent: 5778142 (1998-07-01), Taira et al.

Affiliated with

Also associated with

Rating

Data transmitter, data transmitting method, data receiver, infor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data transmitter, data transmitting method, data receiver, infor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data transmitter, data transmitting method, data receiver, infor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-372723