Fri Oct 21 20:02:50 JST 1994
                                                                Sony

Dear Video Conformance AHG members,
Dear Bitstream Exchange AHG members,


This bitstream is created for the Video Conformance Testing AHG.
Parameters of the bitstream "sony-ct4" are the following:


Bitstream ID:  6.
Description:   Alternating top/bottom, ZZ/Alternative, Intra/Non-intra VLC 
               tables in I pictures, Field and Frame pictures, variable M/N,
               downloaded quantization weighting matrices
Profile and Level: Main
Description: Various syntax switches are toggled from frame-to-frame
Functional stage: Parser and control
Purpose: Sloppy decoders may not handle all scenarios.
Organizations: Sony
Parameters:     

	
	--- sony-ct4 ---
        Bitstream file          sony-ct4.bs
        Reconstructed frames    sony-ct4.pict
        Decoding trace          sony-ct4.trace ( Picture Layer Level)

	Bit rate:               4 Mbit/sec 
	Sampling dimensions:    720 x 480  24 Hz 
	Number of frames:	60 frames
	IDCT:                   double precision

        
        *frame format:

	4:2:0 frame ("display" order) 8 bit

	              width              
                +---------------+       
                |               |          
                |      Y0       | height
                |               |
                |  width/2      |
                +-------+-------+
                |  Cb0  | 
                |       |height/2
                +-------+
                |  Cr0  |height/2
                |       |
                +-------+-------+        
                |               |
                |      Y1       |
                |               |        
                |               |        
                +-------+-------+ 
                |       |



Please check that you can decode it.  Thank-you.

	Best regards,

	Katsumi Tahara
	Motoki Kato

                        ======================================
                        Phone   +81-3-5448-5605
                        Fax     +81-3-5448-5611
                        E-mail  tahara@av.crl.sony.co.jp
				mkato@av.crl.sony.co.jp

                        Image Processing Technology Department
                        Corporate Research Laboratories
                        Sony Corporation
                        Tokyo,Japan
                        ======================================