KR970067259A - Variable Bit Rate Data Format Device and Format Structure of Sectors accordingly - Google Patents

Abstract

The present invention relates to a data formatting device for synchronizing video data compressed at a variable bit rate and audio data compressed at a fixed bit rate at a predetermined rate and synchronizing them to a recording medium and a format structure of a sector thereof, The formatting apparatus includes a video I / F module for outputting coded video data, a VREN signal and a VRCK clock signal for specifying a valid period of the video data, an audio I / F module corresponding thereto, A video buffer memory for storing video data output from the video buffer memory; An audio buffer memory for storing audio data output from the audio I / F module; A VREN signal generator for providing a signal for reading video data stored in the video buffer memory, a video data counter for controlling the VREN signal generator to compute the number of video data of a variable bit rate, An ID data generator for generating ID data, and an audio data generator for generating a video data output from the video buffer memory and a predetermined audio buffer, And a multiplexer section for receiving the audio data output from the memory and selecting one channel. As described above, according to the present invention, the amount of additional hardware required for memory control is reduced, which has a great effect in terms of manufacturing cost. Particularly, the essential requirement of the A / V device has a great effect in realizing miniaturization.

Description

Variable Bit Rate Data Format Device and Format Structure of Sectors accordingly

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a diagram showing the overall structure of a data formatting apparatus according to the present invention. FIG. 2A is a detailed view of a video data counter shown in FIG. 2B is a detailed view of the multiplexer shown in FIG. 1, and FIG. 2C is a view of an apparatus for formatting data generated from the ID data generator shown in FIG. 1, FIG. 2E is a detailed diagram of the audio lead enable signal generating unit shown in FIG. 1; FIG. FIG. 3 is a diagram illustrating a structure of a sector according to the present invention. 4A is a detailed view of the structure of the 4-byte ID area shown in FIG. 4B is a detailed view of the ID area shown in FIG. 4A.

Claims (8)

A variable bit rate data formatting apparatus comprising: a video I / F module for outputting coded video data, a video signal write enable signal and a video signal clock signal for designating a valid period of the video data; An audio I / F module for outputting an encoded audio data, an audio signal write enable signal and an audio signal write clock signal for designating a valid period of audio data; A video buffer memory for storing video data output from the beading I / F module; A plurality of audio buffer memories for storing audio data output from the audio I / F module; A video enable signal generator for providing a signal for reading video data stored in the video buffer memory at a necessary timing; A video data counter section for controlling the video read enable signal generating section to adaptively calculate the number of video data of a variable bit rate; A plurality of audio lead-in enable signal generators each for providing a signal for reading audio data stored in the plurality of audio buffer memories at a necessary timing; An ID data generator for generating ID data; And a multiplexer unit for receiving the video data output from the video buffer memory and the audio data output from the predetermined audio buffer memory and selecting one channel, A sector format structure comprising 180 sectors, including a DUMMY area, a first audio data area, a second audio data area, and a video data area. 3. The apparatus of claim 2, wherein the DUMMY area is an area representing a format structure of a first sector to a third sector, wherein the current sector comprises a 4-byte ID area representing some information and a 4096-byte DUMMY area. Format structure 3. The apparatus of claim 2, wherein the first audio data area is a 4th, 5th, 7th, 11th, 13th and 14th setter format, A first audio signal area of 4032 bytes and a DUMMY area of 60 bytes. 3. The apparatus of claim 2, wherein the second audio data area is a region representing the format of the sixth, ninth, thirteenth, and fifteenth sectors, wherein the current sector includes a 4-byte ID area indicating 3454 bytes A second audio area, and a DUMMY area of 638 bytes. The video data area according to claim 2, wherein the video data area is an area representing the format of the fifteenth through eighteenth sectors, wherein the current sector includes a 4-byte ID area indicating some information, a 4062- And a DUMMY area. 6. The sector structure according to any one of claims 3 to 5, wherein the 4-byte ID area comprises a 2-byte data area and a 2-byte video data area The method of claim 7, wherein the 2-byte data area includes a 1-bit data bit set only in the DUMMY sector, a 1-bit start bit set in an audio sector generated first among 1 GOP, A start bit of the corresponding channel, a 1-bit video bit set in the video sector, a 3-bit channel bit set only in the audio data sector of the corresponding channel, and 6 or 7 frames of the audio sector are formatted, A 3-bit video type bit indicating a sector shape that occurs when the video data variable in 1 GOPT unit time is cut into one sector, and a 3-bit GOP bit The format structure of a sector ※ Note: It is disclosed by the contents of the first application.